81 results on '"Zhibing Zhan"'
Search Results
2. Manipulation of charge transfer and transport in plasmonic-ferroelectric hybrids for photoelectrochemical applications
- Author
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Zhijie Wang, Dawei Cao, Liaoyong Wen, Rui Xu, Manuel Obergfell, Yan Mi, Zhibing Zhan, Nasori Nasori, Jure Demsar, and Yong Lei
- Subjects
Science - Abstract
Photoelectrochemical systems based on plasmonics require control of band bending at the interface as well as transport of hot carriers. Here, Wang et al. employ a ferroelectric material, Pb(Zr,Ti)O3, with gold on ITO to capture hot electrons from the metal and manipulate the photoexcited charges for energy conversion.
- Published
- 2016
- Full Text
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3. Robust mold fabricated by femtosecond laser pulses for continuous thermal imprinting of superhydrophobic surfaces
- Author
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Zhibing Zhan, Erik M Garcell, and Chunlei Guo
- Subjects
superhydrophobic ,thermoplastic imprinting ,polymer ,pulsed-laser ablation ,Materials of engineering and construction. Mechanics of materials ,TA401-492 ,Chemical technology ,TP1-1185 - Abstract
Superhydrophobic surfaces rely on a large number of surface micro/nano structures to increase the roughness of a material. Producing such structures is possible through a multitude of relatively slow methods; however, economic and large scale production of superhydrophobic surfaces require using a fast process on a cheap substrate. Here, we used femtosecond laser processing to fabricate micro and nanostructures on tungsten carbide that we use as a mold to thermally imprint polypropylene sheets. The fabricated tungsten carbide mold was used to imprint more than twenty superhydrophobic polypropylene sheets before mold contamination reduces the surface contact angle below 150°. Using Toluene solution, the mold is subsequently capable of being cleaned of contamination from polypropylene residue and reused for further imprinting. Ninety thermoplastic imprints were conducted using a single tungsten carbide mold with only minimal structural degradation apparent on the micro/nano structured surface.
- Published
- 2019
- Full Text
- View/download PDF
4. Eco-Friendly Fungal Chitosan-Silica Dual-Shell Microcapsules with Tailored Mechanical and Barrier Properties for Potential Consumer Product Applications
- Author
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Daniele Baiocco, Mohammed Al-Sharabi, Benjamin T. Lobel, Olivier J. Cayre, Alexander F. Routh, and Zhibing Zhang
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Chemistry ,QD1-999 - Published
- 2024
- Full Text
- View/download PDF
5. Solar-trackable super-wicking black metal panel for photothermal water sanitation
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Zilong Li, Matthew Madsen, Mohamed ElKabbash, Subhash C. Singh, Jihua Zhang, Zhibing Zhan, Chunlei Guo, Xiaohan Li, Sohail A. Jalil, and Bhabesh Regmi
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Geography, Planning and Development ,Evaporation ,chemistry.chemical_element ,02 engineering and technology ,Management, Monitoring, Policy and Law ,Solar irradiance ,Solar tracker ,Clogging ,03 medical and health sciences ,Aluminium ,Process engineering ,030304 developmental biology ,Nature and Landscape Conservation ,0303 health sciences ,Global and Planetary Change ,Water transport ,Ecology ,Renewable Energy, Sustainability and the Environment ,business.industry ,Photovoltaic system ,Enthalpy of vaporization ,021001 nanoscience & nanotechnology ,Urban Studies ,chemistry ,Environmental science ,0210 nano-technology ,business ,Food Science - Abstract
Solar-based water sanitation is an environmentally friendly process for obtaining clean water that requires efficient light-to-heat-to-vapour generation. Solar-driven interfacial evaporation has potential, but the inability to control interfacial evaporators for solar tracking limits efficiency at large solar zenith angles and when using optical concentration. Furthermore, clogging affects the efficiency of the device. Here, we create a super-wicking and super-light-absorbing (SWSA) aluminium surface for efficient solar-based water sanitation. The measured evaporation rate exceeds that of an ideal device operating at 100% efficiency, which we hypothesize resulted from a reduced enthalpy of vaporization within the microcapillaries. Limited solar absorber–water contact for water transport minimizes heat losses to bulk water and maximizes heat localization at the SWSA surface. The device can be mounted at any angle on a floating platform to optimize incident solar irradiance and can readily be integrated with commercial solar-thermal systems. With a design that is analogous to bifacial photovoltaic solar panels, we show a 150% increase in efficiency compared with a single-sided SWSA. Given the open capillary channels, the device surface can be easily cleaned and reused. Using the SWSA surface to purify contaminated water, we show a decrease in the level of contaminants to well below the WHO and EPA standards for drinkable water. Solar-driven interfacial evaporation can be a sustainable process to obtain clean water but device efficiency and simplicity need improving. This study presents a super-wicking and super-light-absorbing aluminium surface with increased efficiency, a simple structure and strong performance.
- Published
- 2020
6. Highly Floatable Superhydrophobic Metallic Assembly for Aquatic Applications
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Jinluo Cheng, Mohamed ElKabbash, Subhash C. Singh, Chunlei Guo, Jihua Zhang, and Zhibing Zhan
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trapped air ,Buoyancy ,Materials science ,femtosecond laser ablation ,Nanotechnology ,02 engineering and technology ,highly floatable assembly ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,7. Clean energy ,01 natural sciences ,Femtosecond laser ablation ,Trapped air ,0104 chemical sciences ,Drag ,engineering ,superhydrophobic surface ,General Materials Science ,aquatic application ,0210 nano-technology ,Research Article - Abstract
Water-repellent superhydrophobic (SH) surfaces promise a wide range of applications, from increased buoyancy to drag reduction, but their practical use is limited. This comes from the fact that an SH surface will start to lose its efficiency once it is forced into water or damaged by mechanical abrasion. Here, we circumvent these two most challenging obstacles and demonstrate a highly floatable multifaced SH metallic assembly inspired by the diving bell spiders and fire ant assemblies. We study and optimize, both theoretically and experimentally, the floating properties of the design. The assembly shows an unprecedented floating ability; it can float back to the surface even after being forced to submerge under water for months. More strikingly, the assembly maintains its floating ability even after severe damage and piercing in stark contrast to conventional watercrafts and aquatic devices. The potential use of the SH floating metallic assembly ranges from floating devices and electronic equipment protection to highly floatable ships and vessels.
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- 2019
7. Femtosecond-Laser-Produced Underwater 'Superpolymphobic' Nanorippled Surfaces: Repelling Liquid Polymers in Water for Applications of Controlling Polymer Shape and Adhesion
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Subhash C. Singh, Mohamed EIKabbash, Chunlei Guo, Jiale Yong, Feng Chen, and Zhibing Zhan
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chemistry.chemical_classification ,Microlens ,underwater superpolymphobicity ,Materials science ,Polydimethylsiloxane ,Microfluidics ,Polymer ,Adhesion ,three-level microstructure ,Article ,polymer repellence ,Contact angle ,chemistry.chemical_compound ,chemistry ,Superhydrophilicity ,femtosecond laser ,Femtosecond ,General Materials Science ,Composite material ,superhydrophilicity - Abstract
A femtosecond (fs)-laser-processed surface that repels liquid polymer in water is reported in this paper. We define this phenomenon as the "superpolymphobicity". Three-level microstructures (including microgrooves, micromountains/microholes between the microgrooves, and nanoripples on the whole surface) were directly created on the stainless steel surface via fs laser processing. A liquid polydimethylsiloxane (PDMS) droplet on the textured surface had the contact angle of 156 ± 3° and contact angle hysteresis less than 4° in water, indicating excellent underwater superpolymphobicity of the fs-laser-induced hierarchical microstructures. The contact between the resultant superhydrophilic hierarchical microstructures and the submerged liquid PDMS droplet is verified at the underwater Cassie state. The underwater superpolymphobicity enables to design the shape of cured PDMS and selectively avoid the adhesion at the PDMS/substrate interface, different from the previously reported superwettabilities. As the examples, the microlens array and microfluidics system were prepared based on the laser-induced underwater superpolymphobic microstructures.
- Published
- 2019
8. Hierarchical micro/nanostructured TiO2/Ag substrates based on femtosecond laser structuring: A facile route for enhanced SERS performance and location predictability
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Subhash C. Singh, Wei Xin, Zhibing Zhan, Jinlong Lu, Ting Huang, Jianjun Yang, Chunlei Guo, and Zhi Yu
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Materials science ,Nanostructure ,General Physics and Astronomy ,Nanotechnology ,Ag nanoparticles ,02 engineering and technology ,Surfaces and Interfaces ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Microstructure ,Laser ,01 natural sciences ,0104 chemical sciences ,Surfaces, Coatings and Films ,law.invention ,symbols.namesake ,Signal strength ,law ,Femtosecond ,Laser structuring ,symbols ,0210 nano-technology ,Raman scattering - Abstract
Hierarchical micro/nanostructured TiO2/Ag substrates for surface-enhanced Raman scattering (SERS) application are fabricated by depositing Ag nanoparticles on the surface of TiO2 hierarchical micro/nanostructures, which are formed by combining femtosecond laser structuring with scalable hydrothermal treatment. Our results show that the morphology of hierarchical micro/nano TiO2/Ag architectures can significantly influence SERS performance. Compare with one-dimensional TiO2/Ag nanostructures hydrothermally fabricated on laser untreated Ti surface, a four-fold enhancement is shown in the SERS signal with excellent reproducibility. Most importantly, enhancement is significantly stronger in the valleys of our microstructures than on the hills due to geometrical orientation of nanostructures on the surface of the microstructure. The site predictability for SERS enhancement is one of the major roadblock for SERS applications. Present study provides an effective way to enhance the site predictability for optimal SERS in addition to a significant enhancement in signal strength.
- Published
- 2019
9. Reducing Adhesion for Dispensing Tiny Water/Oil Droplets and Gas Bubbles by Femtosecond Laser-Treated Needle Nozzles: Superhydrophobicity, Superoleophobicity, and Superaerophobicity
- Author
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Jinglan Huo, Jiale Yong, Subhash C. Singh, Zhibing Zhan, Chunlei Guo, and Feng Chen
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Materials science ,Renewable Energy, Sustainability and the Environment ,Nozzle ,Energy Engineering and Power Technology ,02 engineering and technology ,Adhesion ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Laser ,01 natural sciences ,0104 chemical sciences ,law.invention ,Biomaterials ,law ,Oil droplet ,Femtosecond ,Materials Chemistry ,Composite material ,0210 nano-technology - Published
- 2018
10. Multipronged heat-exchanger based on femtosecond laser-nano/microstructured Aluminum for thermoelectric heat scavengers
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Zihao Li, Chunlei Guo, Mohamed ElKabbash, Jihua Zhang, Zhibing Zhan, Subhash C. Singh, and Sohail A. Jalil
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Materials science ,Radiative cooling ,Passive cooling ,02 engineering and technology ,Heat sink ,010402 general chemistry ,01 natural sciences ,Article ,Nano ,Heat exchanger ,Thermoelectric effect ,Micro/nanostructuring ,Emissivity ,General Materials Science ,Electrical and Electronic Engineering ,Renewable Energy, Sustainability and the Environment ,business.industry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Heat-sink ,Thermoelectric generator ,Optoelectronics ,0210 nano-technology ,business ,Thermoelectric generators - Abstract
Femtosecond (fs) laser processing can significantly alter the optical, thermal, mechanical, and electrical properties of materials. Here, we show that fs-laser processing transforms aluminum (Al) to a highly efficient and multipronged heat exchanger. By optimizing the formed surface nano- and microstructures, we increase the Al emissivity and surface area by 700% and 300%, respectively. Accordingly, we show that fs-laser treated Al (fs-Al) increases the radiative and convective cooling power of fs-Al by 2100% and 300%, respectively, at 200 °C. As a direct application, we use fs-Al as a heat sink for a thermoelectric generator (TEG) and demonstrate a 280% increase in the TEG output power compared to a TEG with an untreated Al heat exchanger at 200 °C. The multipronged enhancement in fs-Al heat exchange properties lead to an increase in the TEG output power over a wide temperature (T) range (T>50°C). Conversely, a simple radiative cooling heat exchanger increases the TEG output power within a limited temperature range (T>150°C). We investigate the laser processing parameters necessary to maximize the spectral emissivity and surface area of fs-Al. Fs-Al promises to be a widely used and compact heat exchanger for passive cooling of computers and data centers as well as to increase the efficiency of TEGs incorporated in sensors and handheld electronics., Graphical abstract Image 1, Highlights • We produced a novel heat-exchanger by creating nano/micro surface structures on Al via femtosecond laser processing. • We increased the Al emissivity, surface area, radiative and convective cooling by 700%, 300%, 2100% and 300% respectively. • We demonstrated a 280% increase in the TEG output power compared with an untreated Al heat exchanger at 200 °C.
- Published
- 2020
11. Femtosecond Laser-Structured Underwater 'Superpolymphobic' Surfaces
- Author
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Chunlei Guo, Feng Chen, Zhibing Zhan, Subhash C. Singh, and Jiale Yong
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Materials science ,Polydimethylsiloxane ,business.industry ,Laser treatment ,02 engineering and technology ,Surfaces and Interfaces ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Laser ,01 natural sciences ,0104 chemical sciences ,law.invention ,chemistry.chemical_compound ,chemistry ,law ,Femtosecond ,Electrochemistry ,Optoelectronics ,General Materials Science ,Underwater ,0210 nano-technology ,business ,Spectroscopy - Abstract
[Image: see text] In this work, the surfaces that repel liquid polydimethylsiloxane (PDMS) droplets in water were created by femtosecond laser treatment. We define this superwetting phenomenon as underwater “superpolymphobicity”. The resultant underwater superpolymphobic silicon surface shows a contact angle of 159 ± 1° and a sliding angle of 1.5 ± 0.5° to liquid PDMS droplets in water. This underwater superpolymphobicity can be achieved on a wide range of hydrophilic materials, including semiconductors, glass, and metals. The adhesion between the liquid polymer and a solid substrate is effectively prevented by the underwater superpolymphobic microstructures. The underwater superpolymphobicity will have a great significance in designing the adhesion between the polymer and a solid substrate, controlling the shape of the cured polymer materials, as well as nearly all the applications based on the polymer materials.
- Published
- 2019
12. Fluorescence enhanced lab-on-a-chip patterned using a hybrid technique of femtosecond laser direct writing and anodized aluminum oxide porous nanostructuring
- Author
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Zhi Yu, Jinluo Cheng, Xin Zheng, Yuhao Lei, Chunlei Guo, Bin Wang, Jun Xing, Weili Yu, and Zhibing Zhan
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Materials science ,Anodizing ,Nanoporous ,business.industry ,General Engineering ,Oxide ,Bioengineering ,General Chemistry ,Lab-on-a-chip ,Laser ,Atomic and Molecular Physics, and Optics ,law.invention ,Rhodamine 6G ,chemistry.chemical_compound ,chemistry ,law ,Femtosecond ,Optoelectronics ,General Materials Science ,business ,Lithography - Abstract
In this paper, we demonstrate a simple yet effective hybrid method to fabricate lab-on-a-chip devices on aluminum (Al) foil. Instead of using conventional photoresists and lithography methods, an array of square units is first produced by femtosecond laser direct writing, followed by generating highly ordered anodized aluminum oxide (AAO) nanoporous structures within each unit. The AAO treated area becomes hydrophilic. Next, we functionalize the surrounding area outside the square units to superhydrophobic by electrochemical deposition and further chemical modification. This hydrophilic and hydrophobic pattern allows us to confine the liquid samples to be detected within the hydrophilic AAO detection area. We use rhodamine 6G (R6G) as a probe, and obtain a fluorescence intensity enhancement from R6G by 70 times over a flat surface. This leads to the detection sensitivity of R6G molecules to a concentration as low as 10−17 mol L−1. By mixing R6G with RhB molecules, the fluorescence emission bands shift significantly due to the addition of RhB molecules, showing a significantly improved spectral resolution compared to traditional fluorescence spectrometers for liquid samples. This phenomenon can be attributed to the energy transfer between R6G and RhB under laser excitation, which was enhanced by the AAO nanostructures. The array-based LOC device demonstrated in this paper is simple and convenient to fabricate, has low sample consumption and dramatically enhances the fluorescence yield with improved spectral resolution.
- Published
- 2019
13. Microfluidic Channels Fabrication Based on Underwater Superpolymphobic Microgrooves Produced by Femtosecond Laser Direct Writing
- Author
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Feng Chen, Jiale Yong, Subhash C. Singh, Zhibing Zhan, and Chunlei Guo
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underwater superpolymphobicity ,Fabrication ,Nanostructure ,Materials science ,Polymers and Plastics ,Polydimethylsiloxane ,Laser scanning ,business.industry ,Process Chemistry and Technology ,Organic Chemistry ,Microfluidics ,Article ,Contact angle ,chemistry.chemical_compound ,chemistry ,femtosecond laser ,PDMS ,Femtosecond ,Optoelectronics ,microfluidic systems ,microfluidic channels ,business ,Layer (electronics) - Abstract
A strategy is proposed here to fabricate microfluidic channels based on underwater superpolymphobic microgrooves with nanoscale rough surface structure on glass surface produced by femtosecond (fs) laser processing. The fs laser-induced micro/nanostructure on glass surface can repel liquid polydimethylsiloxane (PDMS) underwater, with the contact angle (CA) of 155.5 ± 2.5° and CA hysteresis of 2.7 ± 1.5° to a liquid PDMS droplet. Such a phenomenon is defined as the underwater "superpolymphobicity". Microchannels as well as microfluidic systems are easily prepared and formed between the underwater superpolymphobic microgroove-textured glass substrate and the cured PDMS layer. Because the tracks of the laser scanning lines are programmable, arbitrary-shaped microchannels and complex microfluidic systems can be potentially designed and prepared through fs laser direct writing technology. The concept of "underwater superpolymphobicity" presented here offers us a new strategy for selectively avoiding the adhesion at the polymer/substrate interface and controlling the shape of cured polymers; none of these applications can find analogues in previously reported superwetting materials.
- Published
- 2019
14. Retraction dynamics of a water droplet impacting onto a microgrooved hydrophobic surface at different velocities and surface temperatures
- Author
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Jinkee Lee, Jeong-Hyun Kim, Yee Li Fan, Zhibing Zhan, and Chunlei Guo
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Fluid Flow and Transfer Processes ,Surface (mathematics) ,Materials science ,Mechanical Engineering ,Flow (psychology) ,Dynamics (mechanics) ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,010305 fluids & plasmas ,0103 physical sciences ,Perpendicular ,Dewetting ,Wetting ,Composite material ,0210 nano-technology ,Anisotropy ,Groove (music) - Abstract
A grooved hydrophobic structure is one of the most commonly adopted surface structures inspired by nature, such as rice leaves and butterfly wings, to achieve anisotropic wetting/dewetting. The retraction dynamics of a liquid droplet after impact on a solid surface is less explored than its counterpart, the spreading dynamics, even though it is equally crucial for determining the performance in actual applications. Therefore, in this study, the effects of groove orientation, impact velocity, and surface temperature on the retraction dynamics of a water droplet were investigated through high-speed imaging. The impact velocity and surface temperature were systematically changed while keeping the size of the grooved structures the same. As the impact velocity of the droplet was increased, the enhanced spreading along the groove structures delayed the initiation of droplet retraction. This resulted in anisotropic shapes of the droplet during retraction. During the early stage of droplet retraction, the retraction rate of the droplet was found to be independent of both the groove orientation and impact velocity. The anisotropic retraction of the droplet was also observed by increasing the surface temperature. At a high surface temperature (250°C), there was significant reduction in the retraction rate (~20%) in the direction perpendicular to the grooves, resulting in the formation of an ellipsoidal droplet. It is proposed that the oscillating vapour flow underneath the droplet caused by the groove structures is responsible for the temperature-induced anisotropic retraction.
- Published
- 2021
15. Research on and Application of Feature Recognition and Intelligent Retrieval Method for Multi-Component Alloy Powder Injection Molding Gear Based on Partition Templates
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Yan Kong, Xiaoyi Cui, Zhibing Zhang, and Yuqi Liu
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multi-alloy gear ,MIM ,forming process ,automatic identification ,intelligent retrieval ,Mining engineering. Metallurgy ,TN1-997 - Abstract
The forming process of multi-alloy gears by metal powder injection molding is tedious, and the current design process mainly depends on the experience of designers, which seriously affects the product development cycle and forming quality. In order to solve the problem of the gear feature expression being missing, which hinders the automatic retrieval of similar parts in the analogical design process, a feature recognition and intelligent retrieval method for a multi-alloy powder injection molding gear based on partition templates is proposed in this paper. The partition templates of the gear are defined, and gear digitization is completed by using the automatic recognition algorithm. Searching for similar gear parts in the knowledge base, designers can analogically design the forming process for new parts according to the mature process of the parts in the knowledge base. The automatic identification and intelligent retrieval system developed according to this method has been implemented in two MIM (metal injection molding) product manufacturing enterprises. Case studies and industrial applications have proved the effectiveness of the system, the efficiency of identification and retrieval has been improved by more than 97%, and the number of mold tests has been reduced by 60%.
- Published
- 2024
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16. Superwicking Black Metal Surface for Solar-Thermal Water Sanitation
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Subhash C. Singh, Sohail A. Jalil, Matthew Madsen, Mohamed ElKabbash, Jihua Zhang, Zhibing Zhan, Xiaohan Li, Chunlei Guo, Zilong Li, and Bhabesh Regmi
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Sanitation ,business.industry ,Irradiance ,Thermal water ,Environmental engineering ,Condensed Matter Physics ,Solar energy ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Water scarcity ,Wastewater ,Work (electrical) ,Environmental science ,Electrical and Electronic Engineering ,business - Abstract
Wastewater recycling could be part of an environmentally feasible solution to an increasing global water crisis. In a recent work, we made a push toward that end, introducing a super-wicking, super-light-absorbing solar trackable panel for water sanitation.
- Published
- 2020
17. Debiased ambient vibrations optical coherence elastography to profile cell, organoid and tissue mechanical properties
- Author
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Jonathan H. Mason, Lu Luo, Yvonne Reinwald, Matteo Taffetani, Amelia Hallas-Potts, C. Simon Herrington, Vlastimil Srsen, Chih-Jen Lin, Inês A. Barroso, Zhihua Zhang, Zhibing Zhang, Anita K. Ghag, Ying Yang, Sarah Waters, Alicia J. El Haj, and Pierre O. Bagnaninchi
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Biology (General) ,QH301-705.5 - Abstract
Abstract The role of the mechanical environment in defining tissue function, development and growth has been shown to be fundamental. Assessment of the changes in stiffness of tissue matrices at multiple scales has relied mostly on invasive and often specialist equipment such as AFM or mechanical testing devices poorly suited to the cell culture workflow.In this paper, we have developed a unbiased passive optical coherence elastography method, exploiting ambient vibrations in the sample that enables real-time noninvasive quantitative profiling of cells and tissues. We demonstrate a robust method that decouples optical scattering and mechanical properties by actively compensating for scattering associated noise bias and reducing variance. The efficiency for the method to retrieve ground truth is validated in silico and in vitro, and exemplified for key applications such as time course mechanical profiling of bone and cartilage spheroids, tissue engineering cancer models, tissue repair models and single cell. Our method is readily implementable with any commercial optical coherence tomography system without any hardware modifications, and thus offers a breakthrough in on-line tissue mechanical assessment of spatial mechanical properties for organoids, soft tissues and tissue engineering.
- Published
- 2023
- Full Text
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18. Enhancing thermoelectric output power via radiative cooling with nanoporous alumina
- Author
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Subhash C. Singh, Zhibing Zhan, Mohamed ElKabbash, Zihao Li, Chunlei Guo, Jihua Zhang, Xiaoyun Li, and James Rutledge
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Materials science ,Radiative cooling ,Renewable Energy, Sustainability and the Environment ,Nanoporous ,business.industry ,Passive cooling ,02 engineering and technology ,Heat sink ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Thermal conduction ,7. Clean energy ,01 natural sciences ,0104 chemical sciences ,Thermoelectric generator ,13. Climate action ,Heat transfer ,Thermoelectric effect ,Optoelectronics ,General Materials Science ,Electrical and Electronic Engineering ,0210 nano-technology ,business - Abstract
In this work, we demonstrate an enhanced thermoelectric output power using nanoporous alumina grown on aluminum (Al) surfaces. The improved power is due to enhanced thermal emissivity and passive radiative cooling associated with nanoporous alumina. We show that a careful balance between conduction, convection, and radiation heat transfer processes leads to optimal passive cooling for 30–40 μm thick alumina layers, while the nanopore size has a negligible effect. By growing a conformal alumina layer on an Al heatsink surface, the output power of a commercial thermoelectric generator (TEG) showed about 55%–70% increase for temperature range of 150 − 250 °C compared to using an untreated Al heatsink. With minimal footprint and no additional energy input, our passive cooling optimization method is a simple and facile way to enhance the TEG output power and can be extended to other applications that utilize Al heatsinks, e.g., computers, cell-phones, and refrigerators.
- Published
- 2019
19. Facile Transferring of Wafer-Scale Ultrathin Alumina Membranes onto Substrates for Nanostructure Patterning
- Author
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Samar Tarish, Zhibing Zhan, Yong Lei, Ranjith Vellacheria, Ahmed Al-Haddad, and Chengliang Wang
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Fabrication ,Nanostructure ,Materials science ,General Engineering ,Nanowire ,General Physics and Astronomy ,Nanoparticle ,Nanotechnology ,02 engineering and technology ,Substrate (printing) ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Nanopore ,chemistry.chemical_compound ,Nanomesh ,chemistry ,General Materials Science ,Wafer ,0210 nano-technology - Abstract
Ordered nanostructure arrays have attracted intensive attention because of their various applications. However, it is still a great challenge to achieve ordered nanostructure patterning over a large area (such as wafer-scale) by a technique that allows high throughput, large pattern area and low equipment costs. Here, through a unique design of the fabrication and transferring processes, we achieve a facile transferring of wafer-scale ultrathin alumina membranes (UTAMs) onto substrates without any twisting, folding, cracking and contamination. The most important in our method is fixing the UTAM onto the wafer-scale substrate before removing the backside Al and alumina barrier layer. It is also demonstrated that the thickness and surface smoothing of UTAMs play crucial roles in this transferring process. By using these perfectly transferred UTAMs as masks, various nanostructure patterning including nanoparticle, nanopore (nanomesh) and nanowire arrays are fabricated on wafer-scale substrates with tunable and uniform dimension. Because there are no requirements for UTAMs, substrates and materials to be deposited, the method presented here shall provide a cost-effective platform for the fabrication of ordered nanostructures on large substrates for various applications in nanotechnology.
- Published
- 2015
20. Highly Controllable Surface Plasmon Resonance Property by Heights of Ordered Nanoparticle Arrays Fabricated via a Nonlithographic Route
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Yong Lei, Huaping Zhao, Yan Mi, Rui Xu, and Zhibing Zhan
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Materials science ,business.industry ,Physics::Medical Physics ,General Engineering ,Finite-difference time-domain method ,Physics::Optics ,General Physics and Astronomy ,Nanoparticle ,engineering.material ,Dipole ,Optics ,Coating ,engineering ,Optoelectronics ,General Materials Science ,Surface plasmon resonance ,Multipole expansion ,business ,Plasmon ,Excitation - Abstract
Perfectly ordered nanoparticle arrays are fabricated on large-area substrates (cm(2)) via a cost-effective nonlithographic route. Different surface plasmon resonance (SPR) modes focus consequently on their own positions due to the identical shape and uniform size and distance of these plasmonic metallic nanoparticles (Ag and Au). On the basis of this and FDTD (finite-difference time-domain) simulation, this work reveals the variation of all SPR parameters (position, intensity, width, and mode) with nanoparticle heights, which demonstrates that the effect of heights are different in various stages. On increasing the heights, the major dipole SPR mode precisely blue-shifts from the near-infrared to the visible region with intensity strengthening, a peak narrowing effect, and multipole modes excitation in the UV-vis range. The intensity of multipole modes can be manipulated to be equal to or even greater than the major dipole SPR mode. After coating conformal TiO2 shells on these nanoparticle arrays by atomic layer deposition, the strengthening of the SPR modes with increasing the heights results in the multiplying of the photocurrent (from ∼2.5 to a maximum 90 μA cm(-2)) in this plasmonic-metal-semiconductor-incorporated system. This simple but effective adjustment for all SPR parameters provides guidance for the future design of plasmonic metallic nanostructures, which is significant for SPR applications.
- Published
- 2015
21. Research progress in ZnO single-crystal: growth, scientific understanding, and device applications
- Author
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Yonghao Wang, Kai Ding, Wenwen Lin, Xian Wang, Jiye Zhang, Zhibing Zhan, Qinghong Zheng, Fengbo Yan, Dagui Chen, Feng Huang, Peiwen Lv, and Zhang Lin
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Multidisciplinary ,Fabrication ,Conceptual approach ,Semiconductor ,Single crystal growth ,Chemistry ,business.industry ,Doping ,Photocatalysis ,Nanotechnology ,Magnetic semiconductor ,business ,Single crystal - Abstract
Zinc oxide, a wide band-gap semiconductor, has shown extensive potential applications in high-efficiency semiconductor photoelectronic devices, semiconductor photocatalysis, and diluted magnetic semiconductors. Due to the undisputed lattice integrity, ZnO single crystals are essential for the fabrication of high-quality ZnO-based photoelectronic devices, and also believed to be ideal research subjects for understanding the underlying mechanisms of semiconductor photocatalysis and diluted magnetic semiconductors. This review, which is organized in two main parts, introduces the recent progress in growth, basic characterization, and device development of ZnO single crystals, and some related works in our group. The first part begins from the growth of ZnO single crystal, and summarizes the fundamental and applied investigations based on ZnO single crystals. These works are composed of the fabrication of homoepitaxial ZnO-based photoelectronic devices, the research on the photocatalysis mechanism, and dilute magnetic mechanism. The second part describes the fabrication of highly thermostable n-type ZnO with high mobility and high electron concentration through intentional doping. More importantly, in this part, a conceptual approach for fabricating highly thermostable p-type ZnO materials with high mobility through an integrated three-step treatment is proposed on the basis of the preliminary research.
- Published
- 2014
22. Creating Superhydrophobic Polymer Surfaces with Superstrong Resistance to Harsh Cleaning and Mechanical Abrasion Fabricated by Scalable One‐Step Thermal‐Imprinting
- Author
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Zihao Li, Erik M. Garcell, Mohamed ElKabbash, Xiaoyun Li, Chunlei Guo, Subhash C. Singh, and Zhibing Zhan
- Subjects
chemistry.chemical_classification ,Materials science ,Mechanical Engineering ,One-Step ,Nanotechnology ,02 engineering and technology ,Polymer ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Mechanical abrasion ,0104 chemical sciences ,chemistry ,Mechanics of Materials ,Thermal ,0210 nano-technology ,Imprinting (organizational theory) - Published
- 2019
23. Creation of enhanced transmission for clear and frosted glass through facile surface texturing
- Author
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Zhibing Zhan, Dongkai Chu, Subhash C. Singh, Xiaoyan Sun, Chunlei Guo, and Ji’an Duan
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Materials science ,Scanning electron microscope ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Hydrothermal circulation ,Electronic, Optical and Magnetic Materials ,010309 optics ,Ammonium hydroxide ,chemistry.chemical_compound ,Soda lime ,chemistry ,0103 physical sciences ,Transmittance ,Surface modification ,Composite material ,0210 nano-technology ,Frosted glass ,Refractive index - Abstract
In this study, we present a facile method to enhance the transmittance of soda lime glasses through hydrothermal processing. By adjusting the treated parameters, we obtain two types of glass with enhanced transmission: one frosted glass and one clear glass. Our results show that after surface modification with ammonium hydroxide solution, the transmittance of the frosted glass reach more than 95%. Scanning electron microscopy studies reveal that the treated surface is covered with irregular micro-craters. On the other hand, the treated clear glass is covered with extensive nanoflakes structure. We achieve a maximum of 5.4% transmittance enhancement for the clear glass over a wide wavelength range, to 96.7% for normal incidence.
- Published
- 2019
24. Superamphiphobic Surfaces with Controllable Adhesion Fabricated by Femtosecond Laser Bessel Beam on PTFE
- Author
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Subhash C. Singh, Zhibing Zhan, Xiaoyan Sun, Ji’an Duan, Jiale Yong, Chunlei Guo, and Dongkai Chu
- Subjects
Polytetrafluoroethylene ,Materials science ,business.industry ,Mechanical Engineering ,Adhesion ,Laser ,law.invention ,chemistry.chemical_compound ,chemistry ,Mechanics of Materials ,law ,Femtosecond ,Bessel beam ,Optoelectronics ,business - Published
- 2019
25. Maskless laser nano-lithography of glass through sequential activation of multi-threshold ablation
- Author
-
Chunlei Guo, Anatoliy Y. Vorobyev, Subhash C. Singh, Jianjun Yang, Erik M. Garcell, Billy Lam, Yizhuo He, Zhibing Zhan, and Jihua Zhang
- Subjects
010302 applied physics ,Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Laser ,01 natural sciences ,Fluence ,law.invention ,Controllability ,Nanolithography ,law ,0103 physical sciences ,Nano ,Optoelectronics ,Irradiation ,0210 nano-technology ,business ,Ultrashort pulse ,Lithography - Abstract
Controllable nanofabrication is at the very foundation of nano-science and nano-technology. Today, ultrafast laser writing has been broadly adopted for micro-fabrication because of its ability to make precise and rapid processing of almost all types of materials in an ambient environment. However, direct laser writing is typically unsuitable for high-quality 2D nano-patterning. In this work, we introduce a maskless laser nano-lithographic technique that allows us to create regular 2D periodic nanopatterns on glass. Glass is a particularly challenging material since it does not absorb light readily. Our strategy starts with a glass sample being coated with a thin layer of metal, and then irradiated with a series of pulse bursts at progressively increasing fluence levels. This process allows us to sequentially activate a series of tailored physical processes that lead to the formation of regular 2D periodic nanopatterns on glass. The formation mechanism of this nano-patterning is also simulated numerically and further corroborated by a series of control experiments. We also show controllability in forming various shapes and sizes of nanopatterns through tailored fluence doses. Our technique provides a high-speed and low-cost method for glass nanofabrication.
- Published
- 2019
26. Femtosecond-Laser-Produced Underwater "Superpolymphobic" Nanorippled Surfaces: Repelling Liquid Polymers in Water for Applications of Controlling Polymer Shape and Adhesion.
- Author
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Jiale Yong, Singh, Subhash C., Zhibing Zhan, Mohamed EIKabbash, Feng Chen, and Chunlei Guo
- Published
- 2019
- Full Text
- View/download PDF
27. Effective approach to strengthen plasmon resonance localized on top surfaces of Ag nanoparticles and application in surface-enhanced Raman spectroscopy
- Author
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Yong Lei, Xianzheng Zheng, Qun Fu, Minghong Wu, Zhibing Zhan, and Rui Xu
- Subjects
Materials science ,Mechanical Engineering ,Bioengineering ,Nanotechnology ,02 engineering and technology ,General Chemistry ,Surface-enhanced Raman spectroscopy ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,symbols.namesake ,Adsorption ,Mechanics of Materials ,Excited state ,symbols ,Molecule ,General Materials Science ,Thermal stability ,Electrical and Electronic Engineering ,Surface plasmon resonance ,0210 nano-technology ,Raman spectroscopy ,Plasmon - Abstract
The spatial distribution of localized surface plasmon resonance (LSPR) plays a key role in many plasmonic applications. Based on the thermal stability of alumina templates, this work reports a novel approach to manipulate the distribution of LSPR and exhibits its significance for an important plasmonic application, the surface-enhanced Raman spectroscopy (SERS). A suitable thermal annealing sharpens the edges in top surfaces (far from the substrates) of Ag nanoparticles, which significantly strengthens the distal mode (DM) with the LSPR excited on the top surfaces. Because the top surface is the major place to adsorb probe molecules, this manipulation greatly improves the detection sensitivity of SERS. Our research provides a new way to improve the sensitivity of SERS, which also indicates that great care has to be taken on special LSPR mode which is largely responsible for a certain plasmonic application (e.g., the DM for SERS although it is not the major mode).
- Published
- 2016
28. Photocatalytic Bactericidal Mechanism of Nanoscale TiO2 Films on Escherichia coli
- Author
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Aiying Pang, Wu Zhicheng, Danmei Pan, Yonghao Wang, Zhibing Zhan, Dagui Chen, and Zhang Lin
- Subjects
Materials science ,Biomedical Engineering ,Nanoparticle ,Bioengineering ,Nanotechnology ,General Chemistry ,Sputter deposition ,Condensed Matter Physics ,medicine.disease_cause ,Chemical engineering ,Specific surface area ,Screen printing ,Microscopy ,medicine ,Photocatalysis ,General Materials Science ,Thin film ,Escherichia coli - Abstract
Two kinds of nanoscale TiO2 films were prepared by magnetron sputtering and screen printing methods, respectively. Results show that both phase composition and specific surface area of the film affect the photocatalytic bactericidal efficiency. Time-series in situ atomic force microscopy (AFM) observation were further used to characterize the cellular responses of Escherichia coli (E. coli) in photocatalytic process. Some nanosized patches were found on the bacterial surface in the forepart of photocatalytic reaction. It suggested that the photocatalytic attack induced the self-protection of bacteria at first. Subsequently, some cracks on the surface and the enlargement of cell body indicated that the cell wall was damaged and lost its structure supporting function, and it eventually led to the death of bacteria.
- Published
- 2011
29. Strategy for Preparing Al-Doped ZnO Thin Film with High Mobility and High Stability
- Author
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Danmei Pan, Jiye Zhang, Zhibing Zhan, Zhang Lin, Jin Huang, Feng Huang, and Qinghong Zheng
- Subjects
Electron mobility ,Annealing (metallurgy) ,business.industry ,Doping ,chemistry.chemical_element ,Mineralogy ,General Chemistry ,Zinc ,Condensed Matter Physics ,Epitaxy ,Semiconductor ,chemistry ,Chemical engineering ,General Materials Science ,Thermal stability ,Thin film ,business - Abstract
Ideal Al-doped ZnO (AZO) thin films should have high carrier mobility and carrier concentration, as well as high thermal and chemical stability. To achieve these properties, ZnO should be heavily doped with Al and perfectly crystallized. Through analyzing the possible valence state of the elements and local lattice structures of AZO films during the gas-phase deposition process, we find that the current gas-phase deposition method may encounter an intrinsic obstacle that heavy doping of Al, high thermal stability, and high mobility (perfect crystallinity) cannot be achieved simultaneously. However, based on the understanding that an AZO thin film prepared in oxidizing atmosphere is actually accompanied with a high concentration of zinc vacancy, we propose a strategy to obtain an AZO film with ideal characteristics. Under an oxidizing atmosphere, a heavily doped AZO film with a high concentration of zinc vacancy is prepared using a gas-phase deposition method. Then a zinc vapor annealing treatment is emplo...
- Published
- 2010
30. Subsolidus phase relations in the ZnO–P2O5–WO3 system
- Author
-
Yongjing Wang, Zhang Lin, Weizhen Liu, Zhibing Zhan, Dagui Chen, Hong Yangping, Shungao Yin, Jingkui Liang, and Feng Huang
- Subjects
Diffraction ,Ternary numeral system ,Materials science ,Mechanical Engineering ,Metals and Alloys ,Analytical chemistry ,chemistry.chemical_element ,Mineralogy ,Zinc ,chemistry.chemical_compound ,chemistry ,Mechanics of Materials ,Ternary compound ,Differential thermal analysis ,Materials Chemistry ,Eutectic system ,Phase diagram - Abstract
The subsolidus phase relations of the ZnO–P 2 O 5 –WO 3 ternary system were investigated by means of X-ray diffraction (XRD). No ternary compound was found in this ternary system, while five binary compounds were obtained and six compatibility triangles were determined. The phase diagram of pseudobinary system Zn 3 (PO 4 ) 2 –ZnWO 4 was also constructed through XRD and differential thermal analysis (DTA) methods, which forms eutectic system with eutectic temperature about 990 °C. The corresponding eutectic component is 30 mol% ZnWO 4 and 70 mol% Zn 3 (PO 4 ) 2 .
- Published
- 2010
31. Subsolidus phase relationships in the system ZnO–V2O5–WO3 research on suitable flux for ZnO crystal growth
- Author
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Dagui Chen, Xianzhi Chen, Jingkui Liang, Fengbo Yan, Peiwen Lv, Feng Huang, Bin Li, and Zhibing Zhan
- Subjects
Diffraction ,Materials science ,Ternary numeral system ,Mechanical Engineering ,Metals and Alloys ,Analytical chemistry ,Crystal growth ,Crystallography ,Mechanics of Materials ,Phase (matter) ,Differential thermal analysis ,Materials Chemistry ,Single crystal ,Phase diagram ,Eutectic system - Abstract
The subsolidus phase relations of the ternary system ZnO–V 2 O 5 –WO 3 was investigated by means of X-ray diffraction (XRD) analysis. The phase relations had been constructed. Five binary compounds, five tie lines and six three-phase regions were determined in this system. The possible component regions for ZnO single crystal flux growth were discussed. The phase diagram of Zn 4 V 2 O 9 –ZnWO 4 pseudo-binary system from 740 °C to 1300 °C was also determined through XRD and differential thermal analysis (DTA) methods. DTA results indicated this system was a eutectic system, and the eutectic temperature was 880 °C and eutectic point component was 78 mol% Zn 4 V 2 O 9 and 22 mol% ZnWO 4 . The compounds composed of 78 mol% Zn 4 V 2 O 9 and 22 mol% ZnWO 4 might be suitable flux for ZnO crystal growth.
- Published
- 2009
32. Subsolidus phase relations in the system ZnO–B2O3–V2O5
- Author
-
Zhibing Zhan, Dagui Chen, Peiwen Lv, Demin Liu, Fengbo Yan, Xianzhi Chen, and Feng Huang
- Subjects
Mechanics of Materials ,Mechanical Engineering ,Materials Chemistry ,Metals and Alloys - Published
- 2009
33. DNALI1 interacts with the MEIG1/PACRG complex within the manchette and is required for proper sperm flagellum assembly in mice
- Author
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Yi Tian Yap, Wei Li, Qian Huang, Qi Zhou, David Zhang, Yi Sheng, Ljljiana Mladenovic-Lucas, Siu-Pok Yee, Kyle E Orwig, James G Granneman, David C Williams Jr, Rex A Hess, Aminata Toure, and Zhibing Zhang
- Subjects
DNALI1 ,manchette ,cargo transport ,spermatogenesis ,Medicine ,Science ,Biology (General) ,QH301-705.5 - Abstract
The manchette is a transient and unique structure present in elongating spermatids and required for proper differentiation of the germ cells during spermatogenesis. Previous work indicated that the MEIG1/PACRG complex locates in the manchette and is involved in the transport of cargos, such as SPAG16L, to build the sperm flagellum. Here, using co-immunoprecipitation and pull-down approaches in various cell systems, we established that DNALI1, an axonemal component originally cloned from Chlamydomonas reinhardtii, recruits and stabilizes PACRG and we confirm in vivo, the co-localization of DNALI1 and PACRG in the manchette by immunofluorescence of elongating murine spermatids. We next generated mice with a specific deficiency of DNALI1 in male germ cells, and observed a dramatic reduction of the sperm cells, which results in male infertility. In addition, we observed that the majority of the sperm cells exhibited abnormal morphology including misshapen heads, bent tails, enlarged midpiece, discontinuous accessory structure, emphasizing the importance of DNALI1 in sperm differentiation. Examination of testis histology confirmed impaired spermiogenesis in the mutant mice. Importantly, while testicular levels of MEIG1, PACRG, and SPAG16L proteins were unchanged in the Dnali1 mutant mice, their localization within the manchette was greatly affected, indicating that DNALI1 is required for the formation of the MEIG1/PACRG complex within the manchette. Interestingly, in contrast to MEIG1 and PACRG-deficient mice, the DNALI1-deficient mice also showed impaired sperm spermiation/individualization, suggesting additional functions beyond its involvement in the manchette structure. Overall, our work identifies DNALI1 as a protein required for sperm development.
- Published
- 2023
- Full Text
- View/download PDF
34. Highly Reproducible and Sensitive SERS Substrates with Ag Inter-Nanoparticle Gaps of 5 nm Fabricated by Ultrathin Aluminum Mask Technique
- Author
-
Minghong Wu, Xianzheng Zheng, Yong Lei, Zhibing Zhan, Rui Xu, Qun Fu, and Jinxia Dou
- Subjects
Reproducibility ,Fabrication ,Materials science ,Nanoparticle ,chemistry.chemical_element ,Nanotechnology ,Substrate (electronics) ,Rhodamine 6G ,symbols.namesake ,chemistry.chemical_compound ,chemistry ,Aluminium ,symbols ,Molecule ,General Materials Science ,Raman scattering - Abstract
Applicable surface enhanced Raman scattering (SERS) active substrates require high enhancement factor (EF), excellent spatial reproducibility, and low-cost fabrication method on a large area. Although several SERS substrates with high EF and relative standard deviation (RSD) of signal less than 5% were reported, reliable fabrication for large area SERS substrates with both high sensitivity and high reproducibility via low-cost routes remains a challenge. Here, we report a facile and cost-effective fabrication process for large-scale SERS substrate with Ag inter-nanoparticle (NP) gaps of 5 nm based on ultrathin alumina mask (UTAM) surface pattern technique. Such closely packed Ag NP arrays with high density of electromagnetic field enhancement ("hot spots") on large area exhibit high SERS activity and excellent reproducibility, simultaneously. Rhodamine 6G molecules with concentration of 1 × 10(-7) M are used to determine the SERS performance, and an EF of ∼10(9) is obtained. It should be noted that we obtain RSDs about 2% from 10 random spots on an area of 1 cm(2), which implies the highly reproducible signals. Finite-difference time-domain simulations further suggest that the enhanced electric field originates from the narrow gap, which agrees well with the experimental results. The low value of RSD and the high EF of SERS signals indicate that the as-prepared substrate may be promising for highly sensitive and uniform SERS detection.
- Published
- 2015
35. Whole-Exome Sequencing Identifies the VHL Mutation (c.262T > C, p.Try88Arg) in Non-Obstructive Azoospermia-Associated Cystic Renal Cell Carcinoma
- Author
-
Yonghong Man, Xuejun Shang, Chunyu Liu, Wei Zhang, Qian Huang, Suheng Ma, Rita Shiang, Feng Zhang, Ling Zhang, and Zhibing Zhang
- Subjects
renal cell carcinoma ,von Hippel-Lindau syndrome ,non-obstructive azoospermia ,VHL ,pVHL ,microtubule ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Von Hippel-Lindau (VHL) genes are intimately involved in renal cell carcinoma (RCC), including clear cell RCC (ccRCC) pathogenesis. However, the contribution of pathogenic VHL mutations to ccRCC remains poorly understood. We report a xanthoderm with non-obstructive azoospermia (NOA)-associated cystic ccRCC, and the missense VHL mutation (c.262T > C, p.Try88Arg). In a 34-year-old patient, a urologic physical examination identified hard epididymis, and imaging tests revealed deferens-associated NOA, as well as multi-organ hydatid cysts, including bilateral epididymal cysts, bilateral testicular cysts, bilateral renal cysts, and pancreatic cysts. Five years later, ccRCC was developed based on clinical and radiologic evidence. Two different prediction models of protein structure and multiple sequence alignment across species were applied to assess the pathological effects of the VHL mutation. The reliability of the assessment in silico was determined by both the cellular location and protein levels of the mutant products, using IF and Western blot, respectively. Our study shows that the missense VHL mutation (c.262T > C, p.Try88Arg) plays a deleterious role in pVHL functions, as predicted by multiple sequence alignment across species. While a structural analysis identified no significant structural alterations in pVHL, the detrimental effects of this mutation were determined by exogenous expression, evidenced by a markedly different spatial distribution and reduced expression of mutant pVHL. This is the first report of the VHL gene mutation (c.475T > C, p.Try88Arg) in a xanthoderm.
- Published
- 2022
- Full Text
- View/download PDF
36. Exposure to dithiocarbamate fungicide maneb in vitro and in vivo: Neuronal apoptosis and underlying mechanisms
- Author
-
Chaoyang Liu, Zehua Liu, Yanyan Fang, Zizhuo Liao, Zhibing Zhang, Xin Yuan, Ting Yu, Yunying Yang, Min Xiong, Xingyu Zhang, Guoxin Zhang, Lanxia Meng, and Zhentao Zhang
- Subjects
Maneb ,Neurotoxicity ,Mitochondrial dysfunction ,Apoptosis ,Parkinson’s disease ,Environmental sciences ,GE1-350 - Abstract
Maneb, a widely-used dithiocarbamate fungicide, remains in the environment and exerts adverse health effects. Epidemiological evidence shows that maneb exposure is associated with a higher risk of Parkinson’s disease (PD), one of the most common neurodegenerative diseases. However, the molecular mechanisms underlying maneb-induced neurotoxicity remain unclear. Here we investigated the toxic effects and the underlying mechanisms of maneb on the degeneration of dopaminergic cells and α-synuclein in A53T transgenic mice. In SH-SY5Y cells, exposure to maneb reduces cell viability, triggers neuronal apoptosis, induces mitochondrial dysfunction, and generates reactive oxidative species (ROS) in a dose-dependent manner. Furthermore, Western blot analysis found that the mitochondrial apoptosis pathway (Bcl-2, Bax, cytochrome c, activated caspase-3) and the PKA/CREB signaling pathway (PKA, PDE10A, CREB, p-CREB) were changed by maneb both in vitro and in vivo. In addition, the activation of the mitochondrial apoptosis pathway induced by maneb was attenuated by activating PKA. Therefore, these results suggest that the PKA/CREB signaling pathway is involved in maneb-induced apoptosis. This study provides novel insights into maneb-induced neurotoxicity and the underlying mechanisms, which may serve as a guide for further toxicological assessment and standard application of maneb.
- Published
- 2023
- Full Text
- View/download PDF
37. Sub-100-nm nanoparticle arrays with perfect ordering and tunable and uniform dimensions fabricated by combining nanoimprinting with ultrathin alumina membrane technique
- Author
-
Zhibing Zhan and Yong Lei
- Subjects
Fabrication ,Nanostructure ,Template ,Membrane ,Materials science ,General Engineering ,General Physics and Astronomy ,Organic layer ,Nanoparticle ,General Materials Science ,Nanotechnology ,FOIL method ,Reusability - Abstract
This work reports a nonlithographic nanopatterning approach to fabricate perfectly ordered nanoparticle arrays with tunable and uniform dimensions from about 30 to 80 nm and strict periods of 100 nm in a square lattice on large-area substrates by combining nanoimprinting with ultrathin alumina membrane technique. There is no requirement of any organic layer to support an ultrathin membrane in our novel route, which totally addressed the problems of nonuniform pores in prepatterned alumina templates and contamination during sample preparation, and thus is indispensable for our fabrication of ideally regular nanoparticle arrays on various kinds of substrates (such as flexible plastic). The effect of imprinted pressure on the prepatterning of Al foil was also studied in order to ensure the reusability of the precious imprinting stamps. This simple but efficient method provides a cost-effective platform for the fabrication of perfectly ordered nanostructures on substrates for various applications in nanotechnology.
- Published
- 2014
38. Sperm-associated antigen 6 (Spag6) mutation leads to vestibular dysfunction in mice
- Author
-
Xiaofei Li, Daogong Zhang, Lei Xu, Wenwen Liu, Na Zhang, Jerome F. Strauss, III, Zhibing Zhang, and Haibo Wang
- Subjects
Sperm-associated antigen 6 ,Vestibular dysfunction ,Apoptosis ,Hair cells ,Scarpa's ganglion cells ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Spag6 encodes an axoneme central apparatus protein that is required for normal flagellar and cilia motility. Recent findings suggest that Spag6 plays a role in hearing and planar cell polarity (PCP) in the cochlea of the inner ear. However, a role for Spag6 in the vestibule has not yet been explored. In the present study, the function of Spag6 in the vestibule of the inner ear was examined using Spag6-deficient mice. Our results demonstrate a vestibular disorder in the Spag6 mutants, associated with abnormal ultrastructures of vestibular hair cells and Scarpa's ganglion cells, including swollen stereocilia, decreased crista in mitochondria and swollen Scarpa's ganglion cells. Immunostaining data suggests existence of caspase-dependent apoptosis in vestibular sensory epithelium and Scarpa's ganglion cells. Our observations reveal new functions for Spag6 in vestibular function and apoptosis in the mouse vestibule.
- Published
- 2021
- Full Text
- View/download PDF
39. Concurrent production of glycyrrhetic acid 3-O-mono-β-d-glucuronide and lignocellulolytic enzymes by solid-state fermentation of a plant endophytic Chaetomium globosum
- Author
-
Boliang Gao, Yiwen Xiao, Qian Zhang, Junru Sun, Zhibing Zhang, and Du Zhu
- Subjects
Glycyrrhetic acid 3-O-mono-β-d-glucuronide ,Chaetomium globosum DX-THS3 ,Solid-state fermentation ,Lignocelluloses-degrading enzymes ,Technology ,Chemical technology ,TP1-1185 ,Biotechnology ,TP248.13-248.65 - Abstract
Abstract Glycyrrhetic acid 3-O-mono-β-d-glucuronide (GAMG) as an important derivative of glycyrrhizin (GL) shows stronger biological activities and higher sweetness than GL. The biotransformation process is considered as an efficient strategy for GAMG production, due to its mild reaction, high production efficiency and environmentally friendly status. In this study, licorice straw was used for the first time as a medium for GAMG and lignocellulosic enzyme production via solid-state fermentation (SSF) of endophytic fungus Chaetomium globosum DX-THS3. The fermentation conditions including particle size, temperature, seed age, inoculum size, and moisture of substrate were optimized. Furthermore, additional nitrogen sources and carbon sources were screened for GAMG production by C. globosum DX-THS3 of SSF. Under optimal fermentation conditions, the percent conversion of glycyrrhizin reached 90% in 15 days, whereas the control needed 35 days to achieve the same result. The productivity of optimization (P = 2.1 mg/g/day) was 2.33-fold that of non-optimization (P = 0.9 mg/g/day). Meanwhile, high activities of filter paper enzyme (FPase) (245.80 U/g), carboxymethyl cellulase (CMCase) (33.67 U/g), xylanase (83.44 U/g), and β-glucuronidase activity (271.42 U/g) were obtained faster than those in the control during SSF. Our study provides a novel and efficient strategy for GAMG production and indicates C. globosum DX-THS3 as a potential producer of lignocellulolytic enzymes.
- Published
- 2021
- Full Text
- View/download PDF
40. Photocatalytic bactericidal mechanism of nanoscale TiO2 films on Escherichia coli
- Author
-
Danmei, Pan, Zhibing, Zhan, Dagui, Chen, Zhicheng, Wu, Aiying, Pang, Yonghao, Wang, and Zhang, Lin
- Subjects
Titanium ,X-Ray Diffraction ,Photochemistry ,Escherichia coli ,Metal Nanoparticles ,Microscopy, Atomic Force ,Catalysis - Abstract
Two kinds of nanoscale TiO2 films were prepared by magnetron sputtering and screen printing methods, respectively. Results show that both phase composition and specific surface area of the film affect the photocatalytic bactericidal efficiency. Time-series in situ atomic force microscopy (AFM) observation were further used to characterize the cellular responses of Escherichia coli (E. coli) in photocatalytic process. Some nanosized patches were found on the bacterial surface in the forepart of photocatalytic reaction. It suggested that the photocatalytic attack induced the self-protection of bacteria at first. Subsequently, some cracks on the surface and the enlargement of cell body indicated that the cell wall was damaged and lost its structure supporting function, and it eventually led to the death of bacteria.
- Published
- 2011
41. ChemInform Abstract: Subsolidus Phase Relationships in the System ZnO-V2O5-WO3Research on Suitable Flux for ZnO Crystal Growth
- Author
-
Fengbo Yan, Dagui Chen, Bin Li, Zhibing Zhan, Peiwen Lv, Jingkui Liang, Feng Huang, and Xianzhi Chen
- Subjects
Diffraction ,Ternary numeral system ,Chemistry ,Phase (matter) ,Differential thermal analysis ,Analytical chemistry ,Crystal growth ,General Medicine ,Single crystal ,Phase diagram ,Eutectic system - Abstract
The subsolidus phase relations of the ternary system ZnO–V 2 O 5 –WO 3 was investigated by means of X-ray diffraction (XRD) analysis. The phase relations had been constructed. Five binary compounds, five tie lines and six three-phase regions were determined in this system. The possible component regions for ZnO single crystal flux growth were discussed. The phase diagram of Zn 4 V 2 O 9 –ZnWO 4 pseudo-binary system from 740 °C to 1300 °C was also determined through XRD and differential thermal analysis (DTA) methods. DTA results indicated this system was a eutectic system, and the eutectic temperature was 880 °C and eutectic point component was 78 mol% Zn 4 V 2 O 9 and 22 mol% ZnWO 4 . The compounds composed of 78 mol% Zn 4 V 2 O 9 and 22 mol% ZnWO 4 might be suitable flux for ZnO crystal growth.
- Published
- 2009
42. ChemInform Abstract: Subsolidus Phase Relations in the System ZnO-B2O3-V2O5
- Author
-
Zhibing Zhan, Demin Liu, Fengbo Yan, Peiwen Lv, Dagui Chen, Feng Huang, and Xianzhi Chen
- Subjects
Chemistry ,Phase (matter) ,Thermodynamics ,General Medicine - Published
- 2009
43. Taguchi and ANOVA analysis for the optimization of the microencapsulation of a volatile phase change material
- Author
-
Abdullah Naseer Mustapha, Yan Zhang, Zhibing Zhang, Yulong Ding, Qingchun Yuan, and Yongliang Li
- Subjects
ANOVA analysis ,Taguchi ,Microencapsulation ,Volatile organic compounds ,Phase change materials ,Process optimization ,Mining engineering. Metallurgy ,TN1-997 - Abstract
The microencapsulation of volatile phase change materials is an important and challenging area for low-temperature thermal energy storage. Our previous studies have effectively addressed the challenge of long-term volatile core retention and also indicated that the quality of the obtained poly(urea-formaldehyde) microcapsules is highly affected by various process parameters, including reaction temperature, initial pH, reaction time, and homogenization speed. In this paper, the Taguchi orthogonal array has been employed to optimise controllable process parameters to identify the most synergistic combination, in order to maximise the payload, yield, and encapsulation efficiency. The Taguchi signal-to-noise ratio results substantiated that the most efficient combination of parameters was 3 h reaction time, pH 3.5, 55 °C reaction temperature, and 1200 rpm homogenization speed. With this combination of parameters, microcapsules with superbly high payload of 95.2%, as well as a yield of 30.5% and encapsulation efficiency of 71.1% were amalgamated. In addition, Analysis of Variance (ANOVA) was also utilised to demonstrate the mean response magnitudes (% contribution) of each of the four controllable process parameters, in terms of contribution for the payload, yield, and encapsulation efficiency. Overall, it was indicated that the temperature is the most influential parameter at 83.1% contribution, followed by pH at 6.8%, reaction time at 5.2%, and homogenization speed at 4.9%. Such findings in this work postulate the fundamental insights into maximising the output of the formulation conditions, which in turn is aimed to minimise the time and cost of production of the microcapsules.
- Published
- 2021
- Full Text
- View/download PDF
44. Assisting scalable diagnosis automatically via CT images in the combat against COVID-19
- Author
-
Bohan Liu, Pan Liu, Lutao Dai, Yanlin Yang, Peng Xie, Yiqing Tan, Jicheng Du, Wei Shan, Chenghui Zhao, Qin Zhong, Xixiang Lin, Xizhou Guan, Ning Xing, Yuhui Sun, Wenjun Wang, Zhibing Zhang, Xia Fu, Yanqing Fan, Meifang Li, Na Zhang, Lin Li, Yaou Liu, Lin Xu, Jingbo Du, Zhenhua Zhao, Xuelong Hu, Weipeng Fan, Rongpin Wang, Chongchong Wu, Yongkang Nie, Liuquan Cheng, Lin Ma, Zongren Li, Qian Jia, Minchao Liu, Huayuan Guo, Gao Huang, Haipeng Shen, Liang Zhang, Peifang Zhang, Gang Guo, Hao Li, Weimin An, Jianxin Zhou, and Kunlun He
- Subjects
Medicine ,Science - Abstract
Abstract The pandemic of Coronavirus Disease 2019 (COVID-19) is causing enormous loss of life globally. Prompt case identification is critical. The reference method is the real-time reverse transcription PCR (RT-PCR) assay, whose limitations may curb its prompt large-scale application. COVID-19 manifests with chest computed tomography (CT) abnormalities, some even before the onset of symptoms. We tested the hypothesis that the application of deep learning (DL) to 3D CT images could help identify COVID-19 infections. Using data from 920 COVID-19 and 1,073 non-COVID-19 pneumonia patients, we developed a modified DenseNet-264 model, COVIDNet, to classify CT images to either class. When tested on an independent set of 233 COVID-19 and 289 non-COVID-19 pneumonia patients, COVIDNet achieved an accuracy rate of 94.3% and an area under the curve of 0.98. As of March 23, 2020, the COVIDNet system had been used 11,966 times with a sensitivity of 91.12% and a specificity of 88.50% in six hospitals with PCR confirmation. Application of DL to CT images may improve both efficiency and capacity of case detection and long-term surveillance.
- Published
- 2021
- Full Text
- View/download PDF
45. Viscoelastic Properties of Polymeric Microneedles Determined by Micromanipulation Measurements and Mathematical Modelling
- Author
-
Zhihua Zhang, Guangsheng Du, Xun Sun, and Zhibing Zhang
- Subjects
single microneedles ,micromanipulation ,mechanical strength ,viscoelastic analysis ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Microneedles, including dissolvable ones made from biocompatible and biodegradable materials, have been widely studied and can potentially be used for transdermal drug delivery, disease diagnosis (sampling), skin care, etc. Characterizing their mechanical properties is essential, as being mechanically strong enough to pierce the skin barrier is one of the most fundamental and crucial requirements for them. The micromanipulation technique was based on compressing single microparticles between two flat surfaces to obtain force and displacement data simultaneously. Two mathematical models had already been developed to calculate the rupture stress and apparent Young’s modulus, which can identify variations of these parameters in single microneedles within a microneedle patch. In this study, a new model has been developed to determine the viscoelasticity of single microneedles made of hyaluronic acid (HA) with a molecular weight of 300 kDa loaded with lidocaine by using the micromanipulation technique to gather experimental data. The modelling results from the micromanipulation measurements suggest that the microneedles were viscoelastic and their mechanical behaviour was strain-rate dependent, which implies that the penetration efficiency of viscoelastic microneedles can be improved by increasing their piercing speed into the skin.
- Published
- 2023
- Full Text
- View/download PDF
46. Degenerating Plasmonic Modes to Enhance the Performance of Surface Plasmon Resonance for Application in Solar Energy Conversion
- Author
-
Yong Lei, Zhibing Zhan, Rui Xu, Fabian Grote, and Zhijie Wang
- Subjects
Materials science ,Renewable Energy, Sustainability and the Environment ,business.industry ,Surface plasmon ,Solar energy conversion ,Optoelectronics ,General Materials Science ,Plasmonic solar cell ,Surface plasmon resonance ,business ,Refractive index ,Plasmon ,Localized surface plasmon - Published
- 2015
47. Salt Effect on the Isobaric Vapor–Liquid Equilibrium Study of Binary Mixtures H2O–NMP (N‑Methyl-2-pyrrolidone)
- Author
-
Baorong Wang, Hongliang Qian, Ziya Gao, Xiankun Wu, Guoqiang Yang, Zheng Zhou, Feng Zhang, and Zhibing Zhang
- Subjects
Chemistry ,QD1-999 - Published
- 2020
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48. Computed tomography colonography versus colonoscopy for detection of colorectal cancer: a diagnostic performance study
- Author
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Junping sha, Jun chen, Xuguang lv, Shaoxin liu, Ruihong chen, and Zhibing zhang
- Subjects
Colonoscopy ,Colorectal cancer ,Computed tomographic colonography ,Surgical pathology ,Suspicious polyps ,Medical technology ,R855-855.5 - Abstract
Abstract Background Colonoscopy is the reference standard for the detection of colorectal cancer but it is an invasive technique and has the risk of bowel perforation and bleeding. Unlike colonoscopy, sedation is not required in computed tomography colonography and requires additional reassurance endoscopy. The objectives of the study were to compare the diagnostic performance of computed tomography colonography against colonoscopy for a diagnosis of colorectal cancer. Methods Data regarding any polyp ≥10 mm diameter (ø) and
- Published
- 2020
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49. Relationship between the Young’s Moduli of Whole Microcapsules and Their Shell Material Established by Micromanipulation Measurements Based on Diametric Compression between Two Parallel Surfaces and Numerical Modelling
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Daniele Baiocco, Zhihua Zhang, Yanping He, and Zhibing Zhang
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plant-based ,non-synthetic ,microcapsules ,micromanipulation ,intrinsic mechanical properties ,apparent elastic modulus ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
Micromanipulation is a powerful technique to measure the mechanical properties of microparticles including microcapsules. For microparticles with a homogenous structure, their apparent Young’s modulus can be determined from the force versus displacement data fitted by the classical Hertz model. Microcapsules can consist of a liquid core surrounded by a solid shell. Two Young’s modulus values can be defined, i.e., the one is that determined using the Hertz model and another is the intrinsic Young’s modulus of the shell material, which can be calculated from finite element analysis (FEA). In this study, the two Young’s modulus values of microplastic-free plant-based microcapsules with a core of perfume oil (hexyl salicylate) were calculated using the aforementioned approaches. The apparent Young’s modulus value of the whole microcapsules determined by the classical Hertz model was found to be EA = 0.095 ± 0.014 GPa by treating each individual microcapsule as a homogeneous solid spherical particle. The previously obtained simulation results from FEA were utilised to fit the micromanipulation data of individual core–shell microcapsules, enabling to determine their unique shell thickness to radius ratio (h/r)FEA = 0.132 ± 0.009 and the intrinsic Young’s modulus of their shell (EFEA = 1.02 ± 0.13 GPa). Moreover, a novel theoretical relationship between the two Young’s modulus values has been derived. It is found that the ratio of the two Young’s module values (EA/EFEA) is only a function on the ratio of the shell thickness to radius (h/r) of the individual microcapsule, which can be fitted by a third-degree polynomial function of h/r. Such relationship has proven applicable to a broad spectrum of microcapsules (i.e., non-synthetic, synthetic, and double coated shells) regardless of their shell chemistry.
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- 2023
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50. Research on the Prediction Problem of Satellite Mission Schedulability Based on Bi-LSTM Model
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Guohui Zhang, Xinhong Li, Xun Wang, Zhibing Zhang, Gangxuan Hu, Yanyan Li, and Rui Zhang
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satellite intelligent mission planning ,schedulability prediction ,recurrent neural network ,Bi-LSTM ,Motor vehicles. Aeronautics. Astronautics ,TL1-4050 - Abstract
The realization of microsatellite intelligent mission planning is the current research focus in the field of satellite planning, and mission schedulability prediction is the basis of this research. Aiming at the influence of the sequence tasks before and after the task sequence to be predicted, we propose an online schedulability prediction model of satellite tasks based on bidirectional long short-term memory (Bi-LSTM) on the basis of describing and establishing the satellite task planning and solving model. The model is trained using satellite offline mission planning data as learning samples. In the experiment, the prediction effect of the model is excellent, with a recall rate of 93.17% and a precision rate of 92.59%, which proves that the model can be effectively applied to predict the schedulability of satellite tasks.
- Published
- 2022
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