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1,006 results on '"Pan, Caofeng"'

204. Single-mode lasing of CsPbBr3 perovskite NWs enabled by the Vernier effect

Author

Li, Fangtao, primary, Jiang, Mingming, additional, Cheng, Yang, additional, Zhang, Yufei, additional, Yang, Zheng, additional, Peng, Yiyao, additional, Ma, Wenda, additional, Chen, Qiushuo, additional, Wang, Chunfeng, additional, Liu, Kaihui, additional, Wang, Rongming, additional, Lu, Junfeng, additional, and Pan, Caofeng, additional

Published
2021
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206. Strain‐Insensitive Self‐Powered Tactile Sensor Arrays Based on Intrinsically Stretchable and Patternable Ultrathin Conformal Wrinkled Graphene‐Elastomer Composite.

Author

He, Jiang, Zhou, Runhui, Zhang, Yufei, Gao, Wenchao, Chen, Tao, Mai, Wenjie, and Pan, Caofeng

Subjects
SENSOR arrays, TACTILE sensors, WRINKLE patterns, ELECTRONIC equipment, HUMAN mechanics, PRESSURE sensors, DEFORMATIONS (Mechanics)
Abstract

Tissue‐like intrinsically stretchable electronics have attracted ever‐increasing study attention in recent years as they can form intimate interfaces with skin, endowing devices monitoring tactile and physiological signals with the negligibly constraining movement of the human body. However, harsh mechanical deformation inevitably leads to degradation of or even destroys the electronic properties of the devices. Strain‐insensitive self‐powered triboelectric tactile sensor arrays based on wafer‐scale patterned and intrinsically stretchable nanoscale thin conformal wrinkled graphene‐elastomer composite material are demonstrated here. By regulating the wrinkle structure of the composite, the stretchability performance of the material can be optimized. The fabrication process of the composite can be readily incorporated into photolithography and shadow mask techniques without high temperature, annealing, etching, or organic solvents operating. An intrinsically stretchable semitransparent pressure sensor array is created, which can be stretched to 100% strain without visible signals output degradation. The theoretical modeling points out that the unique conformal wrinkle structure is the key element that attributes to the strain‐insensitive property of the device. This work offers an alternative approach for the design of novel graphene‐based strain‐insensitive stretchable soft electronic devices. [ABSTRACT FROM AUTHOR]

Published
2022
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207. Significance of Flexible Substrates for Wearable and Implantable Devices: Recent Advances and Perspectives.

Author

Hassan, Muhammad, Abbas, Ghulam, Li, Ning, Afzal, Annum, Haider, Zeeshan, Ahmed, Saad, Xu, Xiuru, Pan, Caofeng, and Peng, Zhengchun

Subjects
FLEXIBLE electronics, ELECTRONIC equipment, ENGINEERING design, FLEXIBLE display systems, ENERGY storage, ARTIFICIAL implants
Abstract

In the past decade, flexible electronics have attracted significant research attention due to their distinct features and emerging applications in numerous fields such as, flexible displays, implantable sensors, and energy storage systems, among other applications. Due to the development of flexible electronics, this paper details the substrates employed to produce flexible electronic devices, given that substrates generally govern the overall device properties. The increase in research attention can be attributed to the use of films as flexible substrates, which enable the implementation of numerous design strategies and engineering methodologies, thus leading to extensive advances in the manufacturing quality and prospect of flexible electronics in various applications. This paper provides a comprehensive review of the significance of substrates in flexible wearable electronics over the past decade, such as, the substrate properties requirements, processing classification, important flexible devices, and applications, including sensing, energy storage, and other electronic devices. [ABSTRACT FROM AUTHOR]

Published
2022
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217. High‐Performance Optoelectronics: Lateral 2D WSe 2 p–n Homojunction Formed by Efficient Charge‐Carrier‐Type Modulation for High‐Performance Optoelectronics (Adv. Mater. 9/2020)

Author

Sun, Jiacheng, primary, Wang, Yuyan, additional, Guo, Shaoqiang, additional, Wan, Bensong, additional, Dong, Lianqing, additional, Gu, Youdi, additional, Song, Cheng, additional, Pan, Caofeng, additional, Zhang, Qinghua, additional, Gu, Lin, additional, Pan, Feng, additional, and Zhang, Junying, additional

Published
2020
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224. Biologically Inspired Stretchable, Multifunctional, and 3D Electronic Skin by Strain Visualization and Triboelectric Pressure Sensing.

Author

Li, Jing, Yuan, Zuqing, Han, Xun, Wang, Chunfeng, Huo, Zhihao, Lu, Qiuchun, Xiong, Meiling, Ma, Xiaole, Gao, Wenchao, and Pan, Caofeng

Subjects
TENSILE strength, ANISOTROPY, FLUORESCENCE, DIELECTRIC devices, ELASTICITY
Abstract

Electronic skins have been developed for sensing vertical pressure and tensile strain individually. Here, a stretchable, multifunctional, and 3D electronic skin (SMTE) is fabricated to imitate the squid's natural structure to achieve strain visualization and pressure sensing at the same time. The SMTE consists of an anisotropic and elastic light shutter to tune the natural color or fluorescence, which converts the in‐plane strain to the visual changes in color and intensity. The shutter also works as an elastic dielectric layer for vertical pressure sensing based on the principle of a single‐electrode triboelectric nanogenerator. The performance of the SMTE is demonstrated by integrating it on a model hand as a tactile sensor for touch, bending, and gesture interpretation, which has potential applications in human–machine interaction, soft robots, and artificial intelligence. [ABSTRACT FROM AUTHOR]

Published
2022
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225. Research and application of flexible wearable electronics based on nanogenerator in touch sensor

Author

Pan Caofeng, Wang Chuang, and Bao Rong-Rong

Subjects
business.industry, Computer science, Electrical engineering, Nanogenerator, General Physics and Astronomy, business, Wearable technology
Abstract

With the advance of the fourth industrial revolution, a wave of emerging industries and interdisciplinary research is breaking out, such as the Internet of Things, megadata, humanoid robots and artificial intelligence.The rapid development of these functional electronic devices is changing the way people communicate with each other and their surroundings, thus integrating our world into an intelligent information network. The applications of flexible wearable electronic devices in intelligent robots, health and medical monitoring and other fields have attracted great attention. Following the human skin, the device can respond to external stimuli and should also have stretchability and self-healing properties. In practical applications, a large network of sensors is needed to connect with humans or robots, so the supply of energy is crucial. Several forms of green and renewable energy have been searched for, such as magnetic energy, solar energy, thermal energy, mechanical energy and microbial chemical energy. However, high cost, limitations in the choice of materials, and other disadvantages have become serious bottlenecks.The advent of nanogenerator brings a novel and effective solution to the above problems. Here in this work, the triboelectronic nanogenerator (TENG) and the piezoelectric generator (PENG) are taken as two representative objectives, which are, respectively, based on the triboelectronic effect and piezoelectronic effect to realize the collection of mechanical energy, and each of them can be used as a self-power sensor, which can generate electrical signals, respond to environmental stimuli, and need no power supply any more.The optimization and design of nanogenerator is always a key factor to improve its performance and wide application. At present, the methods commonly adopted in optimization schemes mainly include material selection, design and optimization of structural layer and electrode. The selection of materials should be based on low cost, stretchability, transparency, stability and biocompatibility. Firstly, for the optimization of structural layer, there are mainly two ways of designing the materials, one is the microstructure of the material surface, and the other is the functionalization of materials.The performance of the nanogenerator is proportional to the charge density of the contact surface. The square of the charge density is the main parameter to quantify the performance of the nanogenerator. Therefore, increasing the charge generation has been the main strategy to improve the output power. The microstructure of materials can be realized by means of colloidal arrays, soft lithography, block copolymer components and surface nanomaterial manufacturing. The same materials can be functionalized by ion doping, plasma treatment, electrical polarization, laser induction, and the formation of nanocomposites. In practical application, more attention is paid to the electrode with excellent performance which can simplify device structure, improve device performance and expand application field. The design of the electrode more focuses on the features such as flexibility, stretchability, high transparency and excellent electrical conductivity. The touch sensors based on TENG and PENG such as pressure sensors, strain sensors, pressure distribution sensors and slip sensors have shown excellent performances in application. Self-powered pressure sensors are used most widely because they are highly sensitive to and can detect the subtle pressure changes such as respiratory or arterial pulse-related changes. Strain sensors can detect signals produced by the body during mechanical movements, such as walking and joint movements. Pressure distribution sensor and slip distribution sensor play a key role in touch screen and smart prosthesis and so on.In this article, first, we introduce the mechanism of TENG and PENG, and summarize the way of performing the optimization design of the nanogenerators. Then, we discuss the self-powered sensors based on the nanogenerators such as stress, strain and distribution and slip sensors by combining the marerials and the design of device. Finally, the problems and challenges of the tactile sensor based on the nanogenerators are discussed, and the future development is prospected.

Published
2021

227. Reversible Conversion between Schottky and Ohmic Contacts for Highly Sensitive, Multifunctional Biosensors

Author

Zhao, Luming, primary, Li, Hu, additional, Meng, Jianping, additional, Wang, Aurelia Chi, additional, Tan, Puchuan, additional, Zou, Yang, additional, Yuan, Zuqing, additional, Lu, Junfeng, additional, Pan, Caofeng, additional, Fan, Yubo, additional, Zhang, Yaming, additional, Zhang, Yan, additional, Wang, Zhong Lin, additional, and Li, Zhou, additional

Published
2019
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236. Fiber-Integrated Reversibly Wavelength-Tunable Nanowire Laser Based on Nanocavity Mode Coupling

Author

Zhuge, Ming-Hua, primary, Yang, Zongyin, additional, Zhang, Jianpei, additional, Zheng, Yazhi, additional, Song, Qinghai, additional, Pang, Chenlei, additional, Liu, Xu, additional, Ullah, Salman, additional, Pan, Caofeng, additional, Raghavan, Nagarajan, additional, Zhang, Xing-Hong, additional, Li, Haifeng, additional, Ma, Yaoguang, additional, Yang, Qing, additional, and Hasan, Tawfique, additional

Published
2019
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238. Wavelength‐Tunable Micro/Nanolasers

Author

Zhuge, Ming‐Hua, primary, Pan, Caofeng, additional, Zheng, Yazhi, additional, Tang, Jianbin, additional, Ullah, Salman, additional, Ma, Yaoguang, additional, and Yang, Qing, additional

Published
2019
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246. Controllable Growth of Aligned Monocrystalline CsPbBr 3 Microwire Arrays for Piezoelectric‐Induced Dynamic Modulation of Single‐Mode Lasing

Author

Yang, Zheng, primary, Lu, Junfeng, additional, ZhuGe, Minghua, additional, Cheng, Yang, additional, Hu, Jufang, additional, Li, Fangtao, additional, Qiao, Shuang, additional, Zhang, Yufei, additional, Hu, Guofeng, additional, Yang, Qing, additional, Peng, Dengfeng, additional, Liu, Kaihui, additional, and Pan, Caofeng, additional

Published
2019
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