339,523 results
Search Results
2. Machine Learning in High Energy Physics Community White Paper
- Author
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Albertsson, K, Altoe, P, Anderson, D, Andrews, M, Araque Espinosa, JP, Aurisano, A, Basara, L, Bevan, A, Bhimji, W, Bonacorsi, D, Calafiura, P, Campanelli, M, Capps, L, Carminati, F, Carrazza, S, Childers, T, Coniavitis, E, Cranmer, K, David, C, Davis, D, Duarte, J, Erdmann, M, Eschle, J, Farbin, A, Feickert, M, Castro, NF, Fitzpatrick, C, Floris, M, Forti, A, Garra-Tico, J, Gemmler, J, Girone, M, Glaysher, P, Gleyzer, S, Gligorov, V, Golling, T, Graw, J, Gray, L, Greenwood, D, Hacker, T, Harvey, J, Hegner, B, Heinrich, L, Hooberman, B, Junggeburth, J, Kagan, M, Kane, M, Kanishchev, K, Karpiński, P, Kassabov, Z, Kaul, G, Kcira, D, Keck, T, Klimentov, A, Kowalkowski, J, Kreczko, L, Kurepin, A, Kutschke, R, Kuznetsov, V, Köhler, N, Lakomov, I, Lannon, K, Lassnig, M, Limosani, A, Louppe, G, Mangu, A, Mato, P, Meinhard, H, Menasce, D, Moneta, L, Moortgat, S, Narain, M, Neubauer, M, Newman, H, Pabst, H, Paganini, M, Paulini, M, Perdue, G, Perez, U, Picazio, A, Pivarski, J, Prosper, H, Psihas, F, Radovic, A, Reece, R, Rinkevicius, A, Rodrigues, E, Rorie, J, Rousseau, D, Sauers, A, Schramm, S, Schwartzman, A, Severini, H, Seyfert, P, Siroky, F, Skazytkin, K, Sokoloff, M, Stewart, G, Stienen, B, and Stockdale, I
- Subjects
physics.comp-ph ,cs.LG ,hep-ex ,stat.ML ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Condensed Matter Physics ,Other Physical Sciences ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics - Abstract
Machine learning is an important applied research area in particle physics, beginning with applications to high-level physics analysis in the 1990s and 2000s, followed by an explosion of applications in particle and event identification and reconstruction in the 2010s. In this document we discuss promising future research and development areas in machine learning in particle physics with a roadmap for their implementation, software and hardware resource requirements, collaborative initiatives with the data science community, academia and industry, and training the particle physics community in data science. The main objective of the document is to connect and motivate these areas of research and development with the physics drivers of the High-Luminosity Large Hadron Collider and future neutrino experiments and identify the resource needs for their implementation. Additionally we identify areas where collaboration with external communities will be of great benefit.
- Published
- 2018
3. Laser-Induced, Green and Biocompatible Paper-Based Devices for Circular Electronics
- Author
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Giuseppe Cantarella, Mallikarjun Madagalam, Ignacio Merino, Christian Ebner, Manuela Ciocca, Andrea Polo, Pietro Ibba, Paolo Bettotti, Ahmad Mukhtar, Bajramshahe Shkodra, AKM Sarwar Inam, Alexander J. Johnson, Arash Pouryazdan, Matteo Paganini, Raphael Tiziani, Tanja Mimmo, Stefano Cesco, Niko Münzenrieder, Luisa Petti, Nitzan Cohen, and Paolo Lugli
- Subjects
Biomaterials ,papers ,circular and sustainable electronics ,green electronics ,laser-induced electronics ,Electrochemistry ,flexible electronics ,healthcare ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials - Published
- 2023
4. Peroxidase-Like Activity of Silver Nanoparticles Loaded Filter Paper and its Potential Application for Sensing
- Author
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Kuda Feke and Melisew Tadele Alula
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Filter paper ,Thiocyanate ,Chemistry ,Nanochemistry ,General Chemistry ,Condensed Matter Physics ,Biochemistry ,Silver nanoparticle ,Catalysis ,Nanomaterials ,symbols.namesake ,chemistry.chemical_compound ,symbols ,General Materials Science ,Raman spectroscopy ,Hydrogen peroxide ,Nuclear chemistry - Abstract
Nanozymes are nanomaterials that possess intrinsic enzyme mimicking activity. In this study, the application of silver nanoparticles coated filter paper (AgNPs/FP) that exhibits a peroxidase-like catalytic activity as a potential sensor is reported. A simple chemical reduction method was used to produce AgNPs/FP. The formation of the particles on filter paper were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and surface-enhanced Raman spectroscopy (SERS). In the presence of hydrogen peroxide, AgNPs/FP oxidized the colorless o-phenylenediamine (OPD) and 3,3′,5,5′-tetramethylbenzidine (TMB) solutions to a yellow colored 2,3-diaminophenazine (DAP) and deep blue colored oxidized TMB (oxTMB), respectively. In the presence of thiocyanate, however, the peroxidase-like activity was inhibited in a concentration dependent manner. This makes the AgNPs/FP a promising catalyst and employed for colorimetric detection of thiocyanate via inhibition of the peroxidase-like activity. The application can be further extended to other environmentally and biologically important analytes.
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- 2021
5. Mechanical performance of nano-silica modified insulating paper with mechanical-thermal synergy
- Author
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Yongjin Yu, Xu Kong, and Changyun Li
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Materials science ,Mechanics of Materials ,Mechanical Engineering ,Thermal ,Nano ,Electrical insulation paper ,Electrical and Electronic Engineering ,Composite material ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials - Abstract
In this paper, the mechanical properties of nano-silica modified insulating paper under the combined action of mechanical vibration and temperature conditions are studied. Unmodified and nano-silica modified cellulose insulating paper with 2 wt% and 4 wt% were prepared, respectively, and a series of mechanical-thermal synergy experiments were carried out. With the same mechanical stress and temperature, and with the same aging duration of 144 h (6d), the tensile strength of modified insulating paper with 4 wt% nano-silica, increased 0.99 kN/m and 0.55 kN/m, respectively, compared with those of the unmodified and the 2 wt% nano-silica modified insulating paper. The experiments indicate that the nano-silica modification can effectively improve the mechanical properties of insulating paper. In this work, the modified mechanism of nano-silica is analyzed from the interface effect of modified polymer and the quantum effect of the modified polymer interface two aspects. It is shown that the interface formed in the modified insulating paper can transfer the mechanical stress acted on the insulating paper and prevent the cracks formed in the aging process of the test sample from further expansion, while the quantum effect discretizes the electron energy level, which can restrict the motion of the molecular chain segment to some extent. The conclusion can be used for reference to improve the performance of insulating paper.
- Published
- 2021
6. Incineration of Pulp and Paper Mill Waste in Supercritical Water Using Methane as a Co-Fuel
- Author
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M. Ya. Sokol, A. V. Shishkin, Anatoly A. Vostrikov, D. O. Artamonov, and Oxana N. Fedyaeva
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Environmental Engineering ,Waste management ,business.industry ,Pulp (paper) ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Paper mill ,engineering.material ,Condensed Matter Physics ,Oxygen ,Supercritical fluid ,Methane ,Volumetric flow rate ,Incineration ,chemistry.chemical_compound ,chemistry ,Modeling and Simulation ,Empirical formula ,engineering ,Environmental science ,business - Abstract
The paper presents a research on the disposal of the toxic waste of pulp and paper mill (sludge-lignin with the empirical formula CH1.51N0.05S0.03Cl0.01O0.54through its oxidation in supercritical water-oxygen fluid, including the case of using methane as a co-fuel. The experiments were carried out with a flow reactor of original design at a pressure of 25 MPa, temperature gradient along the vertical axis (from top to bottom: 390–600°C), and variation in the flow rate of the sludge-lignin (with the addition of NaOH, 1.6 wt %), oxygen, and methane. The experiments yielded data on the content of phenols in the water and the composition of the gaseous products collected at the outlet of the reactor versus the oxygen excess ratio. From these data, as well as the time dependences of the reactor wall temperature and the power of the ohmic heaters, it follows that using distributed supply of methane to compensate for the energy for heating of the reagents is preferable as compared with local inlet of methane to the upper part of the reactor. It has been shown that the addition of methane makes it possible to reduce the oxygen excess required for complete oxidation of the organic components of sludge-lignin.
- Published
- 2021
7. Aligned Co3O4–CoOOH heterostructure nanosheet arrays grown on carbon paper with oxygen vacancies for enhanced and robust oxygen evolution
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Bing Zhang and Liang Yan
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Materials science ,business.product_category ,Renewable Energy, Sustainability and the Environment ,Rational design ,Oxygen evolution ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Nanotechnology ,Heterojunction ,Condensed Matter Physics ,Oxygen ,Metal ,Fuel Technology ,chemistry ,visual_art ,visual_art.visual_art_medium ,Carbon paper ,business ,Nanosheet - Abstract
Developing efficient and stable non-noble metal oxygen evolution reaction (OER) electrocatalysts for sustainable overall water-splitting is extremely desirable but still a great challenge. Herein, we developed a facile strategy to fabricate Co3O4–CoOOH heterostructure nanosheet arrays with oxygen vacancies grown on carbon paper (Co3O4–CoOOH/CP). Benefiting from the unique 3D architecture, large surface area, synergistic effects between Co3O4, CoOOH and oxygen vacancies, the obtained self-supporting Co3O4–CoOOH/CP presents excellent electrocatalytic OER activity (low overpotentials of 245 and 390 mV at 10 and 100 mA cm−2) and robust long-term stability in alkaline condition. The present strategy provides the opportunities for the future rational design and discovery of high-performance non-noble metal based electrocatalysts for advanced water oxidation and beyond.
- Published
- 2021
8. Enhanced Conductivity and Flexibility in Reduced Graphene Oxide Paper by Combined Chemical-Thermal Reduction
- Author
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Kai Gao, Jiale Yang, Honglie Shen, Yan Yang, Xueming Ren, and Zehui Wang
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Materials science ,Graphene ,Scanning electron microscope ,Oxide ,Conductivity ,Nanoindentation ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,law.invention ,chemistry.chemical_compound ,chemistry ,law ,Electrical resistivity and conductivity ,Materials Chemistry ,Electrical and Electronic Engineering ,Composite material ,Thin film ,Graphene oxide paper - Abstract
Free-standing reduced graphene oxide (rGO) papers were prepared by chemical reduction, thermal reduction and combined chemical-thermal reduction, respectively. Four-point probe and nanoindentation experiments were conducted to investigate the electrical and mechanical properties of rGO papers. The rGO paper prepared by soaking in L-ascorbic acid and thermal annealing in argon at 1000 °C (labeled rGO-AsA-T) showed superior electrical and mechanical properties when compared with rGO papers prepared merely by chemical reduction or thermal reduction. The as-prepared rGO-AsA-T paper exhibited an electrical conductivity of 5.7 × 104 S/m, showing an increase of 90% compared to that in the thermally annealed rGO paper and nearly 40 times that of rGO paper reduced by L-ascorbic acid. It was also found that the rGO-AsA-T paper had the lowest elastic modulus of 288 MPa, showing enhanced flexibility. The nearly free voids in rGO-AsA-T paper proved by scanning electron microscopy (SEM) were due to the capillary action in chemical reduction and were significant in improving the electrical conductivity and flexibility of the paper. The rGO-AsA-T paper with high conductivity and flexibility has a promising application in flexible electronics.
- Published
- 2021
9. Three Birds with One Stone: Preventive Protection of Paper Materials by ZnO-PHMB and UV-531 Composite Systems
- Author
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Yapei Wang, Dahai Zhang, Qianhao Pan, Xiaogang Zhang, and Minghao Jia
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Materials science ,Ultraviolet Rays ,Composite number ,Surfaces and Interfaces ,Condensed Matter Physics ,Pulp and paper industry ,Folding endurance ,Anti-Bacterial Agents ,Electrochemistry ,Ultraviolet light ,Humans ,Nanoparticles ,General Materials Science ,Zinc Oxide ,Spectroscopy ,Antibacterial agent - Abstract
As the most frequently used archival materials for painting and recording, paper lays the groundwork for the development of prosperous human civilization. However, its susceptibility to three primary factors including external ultraviolet light, increased acidity, and biological pathogens in long-term storage shortens the longevity of paper. Therefore, the protection of paper-based cultural relics is extremely urgent. Inspired by the three adverse factors affecting the protection of cultural relics, we herein propose to combine the ultraviolet absorber 2-hydroxy-4-(octyloxy)benzophenone (UV-531) and alkaline zinc oxide (ZnO) nanoparticles innovatively into the antibacterial agent polyhexamethylene biguanidine hydrochloride (PHMB) to realize the strategy of three birds with one stone for relics protection. This study illustrates that the tensile strength and the folding endurance of different test papers are guaranteed by coating them with the composite reagents, and molds including Mucor, Trichoderma, and Aspergillus niger are effectually sterilized. In addition, a hand-painted Chinese ink-wash painting with beautiful flowers is chosen as the object for simulating cultural relics protection, and negligible color fading is observed in aging experiments. From the perspective of effectiveness, simplicity, and economy, this strategy sheds light on preservative protection of paper-based relics in long-term storage.
- Published
- 2021
10. Surfactant-assisted green liquor dregs pretreatment to enhance the digestibility of paper mill sludge
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Prabashni Lekha, Daneal C.S. Rorke, Gueguim E.B. Kana, and Bruce Sithole
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Renewable Energy, Sustainability and the Environment ,business.industry ,Chemistry ,Pulp (paper) ,Energy Engineering and Power Technology ,Paper mill ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Pulp and paper industry ,01 natural sciences ,0104 chemical sciences ,Fuel Technology ,Kraft process ,engineering ,Green liquor ,Fermentation ,Response surface methodology ,0210 nano-technology ,business ,Hydrogen production ,Waste disposal - Abstract
This study optimizes a novel surfactant-assisted green liquor dregs (GLD) pretreatment of paper mill sludge (PMS), both of which are wastes from the kraft pulping industry, using a combined Response Surface Methodology (RSM) design. Optimized conditions give a maximal reducing sugar release of 16.38 g/L. A substantial reduction in heavy metals aluminum, chromium, cobalt, arsenic, lead, and copper after pretreatment illustrates the enhancement of substrate digestibility by reducing toxic elements. Separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) for hydrogen production are assessed. SSF produced a hydrogen yield of 3.72 mL/g, displaying a 36.26% increase from pretreated PMS compared to SHF. These findings provide insights into possible methods of reducing process duration, energy input, and costs incurred with waste disposal within the paper industry. Furthermore, improved hydrogen yield using an SSF process demonstrates the potential beneficiation of pulp and paper GLD and PMS wastes.
- Published
- 2021
11. Structural and Optical Characteristics of Flexible Optically Rewritable Electronic Paper
- Author
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Aleksey Kudreyko and Vladimir Chigrinov
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Inorganic Chemistry ,General Chemical Engineering ,General Materials Science ,nematic liquid crystals ,optically rewritable electronic paper ,photoalignment ,imaging technologies ,flexible substrates ,Condensed Matter Physics - Abstract
A comprehensive theory of light-reflective characteristics and experimental technique of liquid crystal layer thickness control for flexible optically rewritable electronic paper is presented. Cylindrical pillars were used to control the gap between flexible substrates. The introduced prototype of optically rewritable electronic paper has shown very promising performance. In this regard, we report theoretical results of structural photosensitive alignment of nematic liquid crystals on flexible substrate. The focus of theoretical study is on understanding the self-assembled complex structure, governed by the interplay between surface anchoring and liquid crystal elasticity. Mueller matrix spectroscopic ellipsometry was used to study light-reflecting characteristics and polarization properties of the twisted nematic film.
- Published
- 2022
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12. Multi-scale model for time-dependent degradation of historic paper artefacts
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Parsa Sadr, A., Bosco, E., Suiker, A.S.J., and Applied Mechanics and Design
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Cellulose fibres ,Historic paper ,Mechanics of Materials ,Applied Mathematics ,Mechanical Engineering ,Modeling and Simulation ,SDG 13 – Klimaatactie ,SDG 13 - Climate Action ,General Materials Science ,Chemo-mechanical degradation ,Indoor climate conditions ,Condensed Matter Physics ,Asymptotic homogenization - Abstract
The degradation of paper is due to complex physical and chemical processes that occur as the paper ages, and is enhanced by environmental factors, such as the temperature and relative humidity, and by intrinsic parameters, such as the acidity of the paper. The literature reports that a large percentage of historic documents, manuscripts, and paper objects in museums, libraries and collections is susceptible to degradation phenomena, which may ultimately affect their integrity and longevity. This contribution presents a novel computational model to predict the degradation and lifetime of historic paper. The approach is based on: i) a multi-physics modelling framework, which considers the relevant chemical and mechanical degradation processes and the influence by the ambient environmental conditions, and ii) a multi-scale description, which includes the effect of the intrinsic hierarchical structure of paper, from the fibre- and fibrous network levels to the effective macro-scale, paper sheet level. The paper fibres constructing the fibrous network are characterized by an age-dependent, chemo-mechanical constitutive behaviour. In particular, an evolution equation describes the reduction of the degree of polymerization of cellulose as a function of time and the specific environmental conditions, which in turn is used for determining the fibre tensile strength. The fibre stresses induced by hygro-expansion and hygro-contraction under a change in relative humidity are computed using a coupled hygro-mechanical model, and lead to brittle damage once the fibre tensile strength is reached. Accordingly, the chemical degradation of individual fibres affects the local damage development and stress distribution in the fibrous network, and thereby governs the material response at the paper sheet scale. Asymptotic homogenization is used to calculate the effective hygro-mechanical properties of the fibrous network. A set of numerical simulations is performed to predict the time-dependent degradation of historic paper under a range of temperature, relative humidity and acidity conditions. From these results, isochrone degradation maps are constructed that illustrate the expected lifetime of historic paper as a function of the ambient climate conditions and the acidity of the paper. Further, a practical, analytical degradation function is derived that can be used for a fast estimation of the time-dependent stiffness degradation of paper. The outcome of this work may help conservators to determine the optimal indoor climate conditions in museums, archives and libraries for limiting or delaying time-dependent degradation of historic paper artefacts.
- Published
- 2022
13. Solubility analysis of nano particles, cellulose crystalline region and cellulose molecule, and the impact study of crystalline region on properties of cellulose insulating paper
- Author
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Xuelian Wu, Xu Li, and Shengkun Wei
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Materials science ,General Chemical Engineering ,Electrical insulation paper ,Nanoparticle ,Impact study ,General Chemistry ,Condensed Matter Physics ,chemistry.chemical_compound ,Molecular dynamics ,chemistry ,Chemical engineering ,Modeling and Simulation ,Molecule ,General Materials Science ,Cellulose ,Solubility ,Information Systems - Abstract
For the first time, molecular dynamics simulation was used to analyse the solubility of five kinds of nanoparticles (SiO2, ZnO, Al2O3, Fe2O3, TiO2), cellulose crystalline region and cellulose molec...
- Published
- 2021
14. Optimization of image writer modes for optically rewritable electronic paper
- Author
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Vladimir G. Chigrinov and Aleksey Kudreyko
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Materials science ,business.industry ,law ,Liquid crystal ,Optoelectronics ,General Materials Science ,General Chemistry ,Electronic paper ,Condensed Matter Physics ,business ,law.invention ,Image (mathematics) - Abstract
Time-limited exposure of electrode-free optically rewritable electronic paper is essential for applications, but performance characteristics can be modest. In this study we investigate whether imag...
- Published
- 2021
15. Performance efficiency of MIPOH polymers as organic filler on cellulose pulp waste to form cellulosic paper sheets with biological evaluation and computational studies
- Author
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Ehab E. Abu-El Magd and Asmaa M. Fahim
- Subjects
chemistry.chemical_classification ,Acrylate ,Materials science ,Polymers and Plastics ,Pulp (paper) ,Molecularly imprinted polymer ,02 engineering and technology ,General Chemistry ,Polymer ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,Cellulose fiber ,Monomer ,chemistry ,Chemical engineering ,Materials Chemistry ,engineering ,Thermal stability ,0210 nano-technology ,Ethylene glycol - Abstract
In this elucidation, we synthesized novel molecularly imprinted polymers (MIPOH1-4) that were used as organic fillers on bagasse pulp to form cellulosic paper sheets, the formation of MIPOH1-4 from the reaction of enaminone 3 with methyl methacrylate monomer in the presence of ethylene glycol dimethyl acrylate and 2,2’-azobisisobutyronitrile. The obtained MIPOH1-4 was confirmed via FT-IR and SEM with different pore sizes. And we noticed that the increase of template 3 increases the hydrogen bond between monomer and template and gave sponge surface of MIPOH4. Furthermore, the computational energies of the template with different monomers utilize DFT/B3LYP/6-31G (d) level to know the stability of polymers and hydrogen bonding between them. So that we applied that in paper manufacture through the adsorption of MIPOH4 as an organic filler on bagasse pulp to form novel cellulosic paper sheets with different concentrations and these sheets which characteristic through FT-IR, SEM, sizing test, tensile strength, and elucidation their antimicrobial activity with theoretical and docking studies. The MIPOH4 and cellulosic paper sheets showed the thermal stability and high tendency of sizability of these paper sheets and concluded the interaction between cellulose fibers of pulp with MIPOH polymer with physical hydrogen bonding.
- Published
- 2021
16. Characterization of paper mill sludge as a renewable feedstock for sustainable hydrogen and biofuels production
- Author
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Muhammad Tawalbeh, Tareq Salameh, Alex S. Rajangam, Malek Alkasrawi, and Amani Al-Othman
- Subjects
Energy Engineering and Power Technology ,02 engineering and technology ,engineering.material ,Raw material ,010402 general chemistry ,01 natural sciences ,chemistry.chemical_compound ,Cellulose ,Renewable Energy, Sustainability and the Environment ,business.industry ,Pulp (paper) ,Paper mill ,Renewable fuels ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Pulp and paper industry ,0104 chemical sciences ,Cellulose fiber ,Fuel Technology ,chemistry ,Kraft process ,Biofuel ,engineering ,Environmental science ,0210 nano-technology ,business - Abstract
Paper and pulp mills generate substantial quantities of cellulose-rich sludge materials that are disposed in landfills at a large scale. For sustainability purposes, sludge materials can be bioprocessed to produce renewable fuels and useful chemicals. The enzymatic hydrolysis of cellulose is the process bottleneck that affects the conversion economics directly by using zero-cost raw materials. In order to study and optimize the process, the characteristics of the sludge raw materials should be first evaluated. In this work, sludge samples were obtained from paper mills located at different locations in Wisconsin and Minnesota. Part of the sludge samples was washed (de-ashed) with hydrochloric acid while the other part remained unwashed. The samples were subjected to multiple spectroscopic analyses techniques to evaluate the morphological properties of cellulose fibers and to estimate the total structural carbohydrate content. The results showed that the de-ashing process changed some fiber characteristics and cellulose crystallinity structure in all sludge samples. Sludge sample A (obtained from Kraft pulp and recycled paper mill region) showed a high percentage of fiber, with crystalline cellulose, compared to the other two sludge samples suggesting that sludge A is a valuable source to make value-added products. Aspen Plus mass and energy calculations performed in view of the ‘zero’ cost and the reliable supply of sludge raw materials producing 2 mol H2/mol glucose. Moreover, the results showed that extracting crystalline cellulose from these sludge samples is more profitable than crystalline cellulose made from the other lignocellulosic feedstocks. The results reported here showed that the utilization of these sludge materials would be an economically attractive and promising alternative for the production of hydrogen.
- Published
- 2021
17. Fire-Resistant Paper Based on Ultralong Hydroxyapatite Nanowires
- Author
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Ying-Jie, Zhu
- Subjects
General Engineering ,General Materials Science ,Condensed Matter Physics - Published
- 2023
18. Research on Deacidification and Reinforcement of Archives Paper with Calcium Carbonate Nanoparticles/Modified Hydroxypropyl Cellulose
- Author
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Shu-Jing Yang, Hang-Qi Wang, Shu-Guo Liu, Cui-Hua Sun, Lei Zheng, Peng-Bao Shi, Hai-Lin Cong, and Bing Yu
- Subjects
Control and Systems Engineering ,Materials Chemistry ,Ceramics and Composites ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials - Published
- 2023
19. Near-Field Wireless Sensing of Plastics and Papers Using Frugal Peel-Off Passive Tag
- Author
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Abhishek Kumar Jha, Adam Lamecki, Roberto Gómez-García, and Michal Mrozowski
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Radiation ,Electrical and Electronic Engineering ,Condensed Matter Physics - Published
- 2023
20. IMS2023 Paper Competitions
- Author
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Holger Maune, Michael Roberg, Freek van Straaten, R. Neil Braithwaite, Jonas Urbonas, and Paolo de Falco
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Radiation ,Electrical and Electronic Engineering ,Condensed Matter Physics - Published
- 2023
21. Research on aging behavior of university archives paper with artificial acidification
- Author
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Shu-Jing Yang, Hang-Qi Wang, Peng-Bao Shi, Cui-Hua Sun, Hai-Lin Cong, Lei Zheng, Shu-Guo Liu, and Bing Yu
- Subjects
Condensed Matter Physics ,Electronic, Optical and Magnetic Materials - Published
- 2023
22. Application and enhancement effect of nano-ZnO film preparation technology in the protection of paper artwork
- Author
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Wanli Gu
- Subjects
Condensed Matter Physics ,Electronic, Optical and Magnetic Materials - Published
- 2023
23. Optimization and design of bending‐insensitive paper‐based LC wireless passive sensors
- Author
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Zhihong Fan, Guoxuan Qin, Shihui Yu, Helei Dong, and Lin Yang
- Subjects
Materials science ,business.industry ,Screen printing ,Electronic engineering ,Wireless ,Paper based ,Bending ,Electrical and Electronic Engineering ,Condensed Matter Physics ,business ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials - Published
- 2021
24. Coherency between thermal and electrical transport of partly reduced graphene paper
- Author
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Xinwei Wang, Huan Lin, Jianshu Gao, Yanan Yue, Danmei Xie, and Hamidreza Zobeiri
- Subjects
Materials science ,Condensed matter physics ,Annealing (metallurgy) ,Phonon ,Orders of magnitude (temperature) ,02 engineering and technology ,General Chemistry ,Electron ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Thermal diffusivity ,01 natural sciences ,0104 chemical sciences ,Electrical resistivity and conductivity ,General Materials Science ,0210 nano-technology ,Joule heating ,Graphene oxide paper - Abstract
By continuously varying the structure of graphene oxide paper (PRGP) using Joule heating annealing, we are able to tune its electrical conductivity (σ) and thermal diffusivity (α) in a very wide range: more than three orders of magnitude for σ (186–503009 S/m) and 10-fold for α (8.31 × 10−7 m2/s to 9.31 × 10−6 m2/s). Excellent coherency-linear relationship between σ and α is discovered although they are sustained by different carriers: electrons and phonons. Such coherency exists over two sections: σ > 2 × 104 S/m, and 103
- Published
- 2021
25. Transient deformation and swelling of paper by aqueous co-solvent solutions
- Author
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C.-L. Wong, S. Wang, S. Karimnejad, M. G. Wijburg, H. Mansouri, A. A. Darhuber, Fluids and Flows, EIRES, and Micro- and Nanoscale Flows (Darhuber)
- Subjects
General Chemistry ,Condensed Matter Physics - Abstract
Inkjet printing inks frequently contain polar liquids of low volatility such as glycerol or poly(ethylene glycols) in addition to the main solvent water. The deposition of these liquids on paper sheets induces swelling of the cellulose fibers, which leads to an overall, anisotropic deformation of the sheet. We characterized the corresponding strain components by means of a grid projection method and white light interferometry. For pure water, most of the hydroexpansion strain vanishes again after drying is complete. However, for aqueous solutions of non-volatile co-solvents, a large fraction of the deformation persists after the water has evaporated. Because swelling occurs only after liquid enters the cellulose fibers, monitoring the dynamics of expansion provides insight into the pore-fiber distribution of co-solvents. The corresponding timescales of pore-fiber transport strongly depend on the co-solvent concentration, as a sufficient quantity of water is needed to plasticize the fiber walls.
- Published
- 2023
26. A g-C3N4-coated paper-based separator for sodium metal batteries
- Author
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Hao Zheng, Yongchao Liu, Yi Sun, Jian Ma, Xin Liang, Xin Yao, Longjun Wu, and Hongfa Xiang
- Subjects
Battery (electricity) ,Coated paper ,Materials science ,Graphitic carbon nitride ,Separator (oil production) ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Electrochemistry ,01 natural sciences ,Energy storage ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,General Materials Science ,Thermal stability ,Electrical and Electronic Engineering ,0210 nano-technology - Abstract
A paper-based membrane coated by graphitic carbon nitride (g-C3N4) is prepared via a dip-coating method and used as a separator for sodium metal batteries with merits of low cost and environment-friendliness. Introduction of g-C3N4 effectively improves the ionic conductivity and the structural stability of the separator. Compared with traditional polyethylene separators and Al2O3-coated separators, the g-C3N4-coated separators show better electrolyte wettability, thermal stability, and electrochemical stability. Therefore, Na||Na3V2(PO4)3 battery using the g-C3N4-coated separator exhibits better cycling stability and higher rate capability. These results prove that the g-C3N4-coated paper-based separator is expected to become the next generation of low-cost and high-safety separator in sodium metal batteries.
- Published
- 2021
27. Nano‐MgO prepared via templating on biodegradable filter paper
- Author
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Yu Jiang, Hukui Chen, Jie Huang, Zhijun He, Xiaxia Mu, and Hongli Jiang
- Subjects
Materials science ,Filter paper ,Chemical technology ,Nano ,Biomedical Engineering ,TA401-492 ,General Materials Science ,Bioengineering ,Nanotechnology ,TP1-1185 ,Condensed Matter Physics ,Materials of engineering and construction. Mechanics of materials - Abstract
Nano‐MgO was successfully fabricated by a facile, inexpensive, and environment‐friendly synthetic method using filter paper as a bio‐template. The influence of the concentration of raw material Mg(CH3COO)2·4H2O on the textural properties of nano‐MgO was investigated, and the as‐prepared nano‐MgO was characterized by X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive X‐ray analysis, thermo gravimetric analysis, Fourier transform infrared spectroscopy. The results of the experiment show the synthetic MgO fibres are composed of 20 nm tiny particles with a surface area of 68.28 m2/g and a pore width of 13 nm. When the concentration of Mg(CH3COO)2·4H2O solution was 0.03 mol/L, the product MgO copied the micro‐morphology of the filter paper. In addition, the photocatalytic activity of the prepared sample was investigated, and the results showed that the nano‐MgO prepared by this method has a higher catalytic activity than that prepared without a template.
- Published
- 2021
28. Study on flame retardancy of ammonium polyphosphate/montmorillonite nanocompound coated cellulose paper and its application as surface flame retarded treatment for polypropylene
- Author
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Mingzhu Zhou, Jianwei Hao, Jun Xing, Deqi Yi, and Peifan Qin
- Subjects
Polypropylene ,Coated paper ,Materials science ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Fire performance ,010406 physical chemistry ,0104 chemical sciences ,chemistry.chemical_compound ,Montmorillonite ,Chemical engineering ,chemistry ,Cone calorimeter ,Thermal stability ,Physical and Theoretical Chemistry ,0210 nano-technology ,Ammonium polyphosphate ,Fire retardant - Abstract
Natural cellulose paper is flame retarded using ammonium polyphosphate/montmorillonite (APP/MMT) nanocompound through coating method. Their morphologies are assessed by scanning electron microscopy, chemical components by energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy, chemical structure by Fourier transform infrared, thermal stability by thermo-gravimetric analysis and fire retardancy by 45° horizontal burning test. The results show that the thermal stability and flame retardancy of coated paper samples are enhanced obviously, and all samples are self-extinguishing during the tests due to the char formation reaction between APP/MMT and cellulose. Then the treated paper, AM-18.3, as surface flame retardant treatment for low specific surface area (SSA) polypropylene (PP) specimens (PP@AM-18.3) also is investigated using cone calorimeter. Compared with two controlled samples, PP@AM-18.3 shows significantly increased time to ignition, the lowest fire growth index and highest fire performance index. This may give a new flame retarded approach for low SSA polymer materials with little amount flame retardants.
- Published
- 2021
29. Graphene-Paper-Based Electrodes on Plastic and Textile Supports as New Platforms for Amperometric Biosensing
- Author
-
Chiara Zanardi, Emanuele Treossi, Fabrizio Poletti, L. Favaretto, Barbara Zanfrognini, Alessandra Scidà, Manuela Melucci, Vitaliy Parkula, Vincenzo Palermo, and Alessandro Kovtun
- Subjects
electrochemical platforms ,Textile ,Materials science ,business.industry ,graphene paper ,Nanotechnology ,electrochemical biosensors ,flexible electronics ,smart fabrics ,Condensed Matter Physics ,Flexible electronics ,Amperometry ,Electronic, Optical and Magnetic Materials ,Biomaterials ,Electrode ,Electrochemistry ,Electrochemical biosensor ,Settore CHIM/01 - Chimica Analitica ,business ,Biosensor ,Graphene oxide paper - Abstract
The possibility of exfoliating graphite into graphene sheets allows the researchers to produce a material, termed "graphene paper" (G-paper), conductive as graphite but more flexible and processable. G-paper is already used for electronic applications, like conductors, antennas, and heaters, outperforming metal conductors thanks to its high flexibility, lightness, chemical stability, and compatibility with polymeric substrates. Here, the effectiveness in the use of G-paper for the realization of electrodes on flexible plastic substrates and textiles, and their applicability as amperometric sensors are demonstrated. The performance of these devices is compared with commercial platforms made of carbon-based inks, finding that they outperform commercial devices in sensing nicotinamide adenine dinucleotide (NADH), a key molecule for enzymatic biosensing; the electrodes can achieve state-of-the-art sensitivity (107.2 ?A mm cm) and limit of detection (0.6 × 10 m) with no need of additional functionalization. Thanks to this property, the stable deposition of a suitable enzyme, namely lactate dehydrogenase, on the electrode surface is used as a proof of concept of the applicability of this new platform for the realization of a biosensor. The possibility of having a single material suitable for antennas, electronics, and now sensing opens new opportunities for smart fabrics in wearable electronic applications.
- Published
- 2022
30. Thermal synthesis of Pt nanoparticles on carbon paper supports
- Author
-
Molina Puerto, Javier, Valero-Gómez, A., and Bosch, F.
- Subjects
Fuel Technology ,Renewable Energy, Sustainability and the Environment ,Nanoparticles ,Thermal synthesis ,Energy Engineering and Power Technology ,Electrocatalyst ,Condensed Matter Physics ,Platinum ,QUIMICA FISICA - Abstract
[EN] A thermal method of synthesis and fixation of Pt nanoparticles (Pt NPs) on carbon paper is proposed in this paper. Carbon paper was coated with H2PtCl6 by simple immersion in an ethanol solution containing the Pt precursor. Thereafter, H2PtCl6 was decomposed in inert atmosphere into Pt NPs by applying a temperature of 600 °C. Formed Pt NPs were able to oxidize the surrounding carbon fiber surface. This local thermal oxidation of carbon promoted the generation of nano-roughness and Pt NPs were embedded in the carbon fiber, thus favoring their fixation on carbon paper. Pt load can be easily controlled by the number of coating processes applied. The proposed method combines the advantage of achieving small size nanoparticles (5¿10 nm) with enhanced fixation of Pt NPs when compared with electrochemical synthesis. The optimal number of coatings applied was three, which produced a complete coverage of carbon paper surface (with a Pt load of 0.18 mg cm¿2)., This work was supported by the Instituto Valenciano de Competitividad Empresarial (IVACE) (project references IMDECA/2016/50, IMDEEA/2017/116, IMDEEA/2018/26) and European Union (FEDER funds). Electron Microscopy Service of the UPV (Universitat Politecnica de Val encia) is gratefully acknowledged for help with FESEM and EDX characterization.
- Published
- 2022
31. Surface Degradation of Oil-Immersed Nomex Paper Caused by Partial Discharge of High-Frequency Voltage
- Author
-
Xiaonan Li, Wenxu Zhang, Hong Wang, Xiping Ma, Hongliang Zhang, Kangle Li, Tong Qin, Kai Liu, Yan Yang, and Guangning Wu
- Subjects
Materials Chemistry ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials - Abstract
The oil-paper insulation of high-frequency (HF) transformers frequently withstands high-frequency over-voltages at frequencies of several kHz and above. This leads to the occurrence of partial discharge (PD), which causes premature insulation failure in HF transformers. In order to investigate the effect of PD under high-frequency stresses on oil-impregnated Nomex paper, this paper analyzes the surface morphology, bond-broken types of the molecular chain, and product types formed for oil paper after PD degradation. Then, the damage mechanism of oil-immersed Nomex paper between high-frequency and AC stress is explored. The experimental results show that the branches of creepage do not exist in the oil-paper insulation during the entire discharge process under high-frequency stresses, and that their damage degree is higher than that of AC stress. This is mainly because the benzene ring of oil-impregnated Nomex paper is destroyed and opened caused by high-energy particles, the heating effect in HF discharge, and the bulk effect. These results help to improve the design theory of insulation structures and to develop PD-resistant insulation materials in HF transformers.
- Published
- 2022
32. A Study on Waste Paper Reinforced Recycled Polypropylene Biocomposite
- Author
-
Jevgenijs Jaunslavietis, Jurijs Ozolins, Martins Kalnins, Galia Shulga, Brigita Neiberte, Anrijs Verovkins, and Talrits Betkers
- Subjects
Mechanics of Materials ,Mechanical Engineering ,General Materials Science ,Condensed Matter Physics - Abstract
The growing global request to make green materials nowadays expresses in reducing environmental problems and obtaining biomaterials with high-performed properties. Aside from being carbon neutral, the use of biomass for obtaining green materials contributes to energy security and climate change mitigation. The aim of the work was to fabricate and study a recycled polypropylene-based composite filled with recycled waste paper obtained by the acid hydrolysis of de-inked newsprint. It has been found that, with increasing the content of the recycled paper microparticles in the bio-composite, its mechanical and wetting properties deteriorated. The presence of maleic anhydride grafted polypropylene as a compatibilizer increased the homogeneity of the structure of the bio-composite, which improved its mechanical properties and decreased its ability to be wetted with water.
- Published
- 2022
33. Low-Gradient Magnetophoresis of Nanospheres and Nanorods through a Single Layer of Paper
- Author
-
James Kah Chun Law, Wei Ming Ng, Wai Hong Chong, Qingsi Li, Lei Zhang, Fitri Khoerunnisa, and JitKang Lim
- Subjects
Electrochemistry ,General Materials Science ,Surfaces and Interfaces ,Condensed Matter Physics ,Spectroscopy - Published
- 2023
34. Hierarchical construction of CNT networks in aramid papers for high-efficiency microwave absorption
- Author
-
You Wu, Li Chen, Yixuan Han, Panbo Liu, Haihong Xu, Guanze Yu, Yingying Wang, Tao Wen, Wenbo Ju, and Junwei Gu
- Subjects
General Materials Science ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics - Published
- 2023
35. Immobilization of Saccharomyces cerevisiae for application in paper-based microfluidic fuel cell
- Author
-
A.D. García-Villagómez, J. Galindo-de-la-Rosa, A. Dector, A. Álvarez, J.A. Rodríguez-Morales, J.M. Olivares-Ramírez, N. Arjona, A.U. Chávez-Ramírez, and V. Vallejo-Becerra
- Subjects
Fuel Technology ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Condensed Matter Physics - Published
- 2023
36. A Novel Triboelectric Nanogenerator Based on Chitosan-Cotton-Paper Film for Biomechanical Energy Harvesting and Grip Force Motion Sensing
- Author
-
Wenning Ren and Lei Xia
- Subjects
Materials Chemistry ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials - Published
- 2023
37. Electrodeposited platinum with various morphologies on carbon paper as efficient and durable self-supporting electrode for methanol and ammonia oxidation reactions
- Author
-
Weiqi Zhang, Xingchen Wang, Meihui Tan, Huiyuan Liu, Qiang Ma, Qian Xu, Bruno G. Pollet, and Huaneng Su
- Subjects
Fuel Technology ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Condensed Matter Physics - Published
- 2023
38. Optical Neural Networks for Holographic Image Recognition (Invited Paper)
- Author
-
Yiming Feng, Junru Niu, Yiyun Zhang, Yixuan Li, Hongsheng Chen, and Haoliang Qian
- Subjects
Radiation ,Electrical and Electronic Engineering ,Condensed Matter Physics - Published
- 2023
39. Rapid and sensitive detection of neotame in instant grain beverages by paper‐based silver nanoparticles substrates
- Author
-
Mingming Han, Weiwei Wei, Hongmei Lu, and Zhimin Zhang
- Subjects
Detection limit ,Materials science ,Filter paper ,Biomedical Engineering ,Analytical chemistry ,Substrate (chemistry) ,Nanoparticle ,Bioengineering ,02 engineering and technology ,Repeatability ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Artificial Sweetener ,Silver nanoparticle ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Neotame ,General Materials Science ,0210 nano-technology - Abstract
Neotame is an artificial sweetener with increasing consumption in recent years, excessive intake of it may bring potential health risk. In this work, a rapid method was developed to detect neotame in instant grain beverages, which was based on surface-enhanced Raman scattering (SERS) technique and filter paper-based silver nanoparticles (AgNPs@FP) substrates. The designed substrate exhibits good SERS activity with an enhancement factor of 105 because of the synergistic effect of the concentrated silver nanoparticles and filter paper. Meanwhile, the stability and repeatability of this fabricated substrate have been investigated with the relative standard deviation of 6.1%. In addition, it shows an excellent linear relationship (R 2 = 0.997) between the SERS signal and the logarithm concentration of neotame with a wide concentration range (0.05–5 g/kg) in the quantitative analysis. The limit of detection of neotame can be as low as 0.01 g/kg in instant grain beverages, which is below the maximum allowable addition level for neotame in instant grain beverages set in China (GB2760-2014, 0.16 g/kg). The proposed method has great potential for the identification and quantification of neotame in food safety applications with high sensitivity.
- Published
- 2020
40. Utilizing Heterostructured Porous Particles to Improve Traditional Paper Chromatography for Spontaneous Protein Separation
- Author
-
Xu Cheng, Yuemeng Yang, Yongyang Song, Li-Ping Xu, and Shutao Wang
- Subjects
Chromatography, Paper ,Electrochemistry ,Nanofibers ,General Materials Science ,Surfaces and Interfaces ,Condensed Matter Physics ,Porosity ,Spectroscopy ,Chromatography, High Pressure Liquid - Abstract
Chromatography is a classical technique for protein separation. However, the chromatography column is filled with tightly packed separation materials and requires an additional pressurizing pump to propel the flow of fluidic samples, largely restraining their applications. Here, we combine heterostructured porous particles with paper strips, realizing spontaneous separation of similarly sized proteins. The interconnected nanofibrous structure and good hydrophility of paper strips enable the spontaneous flow of the liquid sample, and the heterostructured porous particles provide versatile tools for protein separation via electrostatic interaction. The fabricated paper strips are inexpensive, user-friendly, and disposable and exhibit good separation performance. This work may offer a new avenue for fabricating on-site bioseparation tools and purifying various biomacromolecules.
- Published
- 2022
41. Manufacturing Free-Standing Graphene Oxide/Carbon Nanotube Hybrid Papers and Improving Electrical Conductivity by a Mild Annealing Treatment
- Author
-
R.A. Oliveira, J.P. Nascimento, M. H. A. Zanin, L. F. P. Santos, B. Ribeiro, A. Guimarães, E. C. Botelho, and M. L. Costa
- Subjects
electrical conductivity ,Mechanics of Materials ,Mechanical Engineering ,graphene paper ,graphene oxide ,General Materials Science ,multi-walled carbon nanotubes ,Condensed Matter Physics ,carbon nanomaterials - Abstract
The present work aims to evaluate the manufacturing processes of free-standing graphene oxide (GO)/reduced graphene oxide(rGO)/carbon nanotube (MWCNT) papers-like and the effect on electrical conductivities after annealing treatment. The pure GO and the hybrid papers were obtained by vacuum filtration and submitted to mild thermal annealing at 400 °C under an argon atmosphere. Analyses comparing the carbon paper-like materials before and after thermal treatment were done by thermogravimetric analysis (TGA), Raman spectroscopy, scanning electron microscopy (SEM), and electrical conductivity measurements. The characterization results show the annealing process effect on the morphology of paper materials. The GO papers and the hybrid (GO/rGO/MWCNT) exhibited good free-standing structure properties. The SEM results suggest the formation of gas void due to the thermal treatment. TGA and Raman results showed the thermal reduction and restoration of the carbon sp2 network of the graphene oxide induced by thermal treatment. The thermal treatment was responsible for changing the almost insulator characteristic of free-standing pure GO paper, achieving an electrical conductivity of 752 S/m, and improving 45% of the free-standing hybrid carbon nanomaterials papers (GO/rGO/MWCNT) electrical conductivity, achieving the value of 1020 S/m.
- Published
- 2022
42. High Weight-Specific Power Density of Thin-Film Amorphous Silicon Solar Cells on Graphene Papers
- Author
-
Liyou Yang, Xin Zhang, Linfeng Lu, Jinrong Cheng, Min Yin, Guqiao Ding, Dongdong Li, Chi Zhang, Shuangying Cao, and Peng Wang
- Subjects
Amorphous silicon ,Materials science ,Graphene paper ,02 engineering and technology ,Substrate (electronics) ,010402 general chemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,law ,Thermal ,lcsh:TA401-492 ,General Materials Science ,Thin film ,Power density ,Graphene oxide paper ,Nano Express ,Graphene ,business.industry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Cadmium telluride photovoltaics ,0104 chemical sciences ,chemistry ,Optoelectronics ,Thin-film solar cells ,lcsh:Materials of engineering and construction. Mechanics of materials ,Flexibility ,0210 nano-technology ,business ,Weight-specific power density - Abstract
Flexible thin-film solar cells with high weight-specific power density are highly desired in the emerging portable/wearable electronic devices, solar-powered vehicles, etc. The conventional flexible metallic or plastic substrates are encountered either overweight or thermal and mechanical mismatch with deposited films. In this work, we proposed a novel substrate for flexible solar cells based on graphene paper, which possesses the advantages of being lightweight and having a high-temperature tolerance and high mechanical flexibility. Thin-film amorphous silicon (a-Si:H) solar cells were constructed on such graphene paper, whose power density is 4.5 times higher than that on plastic polyimide substrates. In addition, the a-Si:H solar cells present notable flexibility whose power conversion efficiencies show little degradation when the solar cells are bent to a radius as small as 14 mm for more than 100 times. The application of this unique flexible substrate can be extended to CuInGaSe and CdTe solar cells and other thin-film devices requiring high-temperature processing.
- Published
- 2019
43. Pencil-on-Paper Humidity Sensor Treated with NaCl Solution for Health Monitoring and Skin Characterization
- Author
-
Guangyu Niu, Zihan Wang, Ye Xue, Jiayi Yan, Ankan Dutta, Xue Chen, Ya Wang, Chaosai Liu, Shuaijie Du, Langang Guo, Peng Zhou, Huanyu Cheng, and Li Yang
- Subjects
Mechanical Engineering ,General Materials Science ,Bioengineering ,General Chemistry ,Condensed Matter Physics - Abstract
Although flexible humidity sensors are essential for human health monitoring, it is still challenging to achieve high sensitivity and easy disposal with simple, low-cost fabrication processes. This study presents the design and fabrication of highly reliable hand-drawn interdigital electrodes from pencil-on-paper treated with NaCl solution for highly sensitive hydration sensors working over a wide range of relative humidity (RH) levels from 5.6% to 90%. The applications of the resulting flexible humidity sensor go beyond the monitoring of respiratory rate and proximity to characterizations of human skin types and evaluations of skin barrier functions through insensible sweat measurements. The sensor array can also be integrated with a diaper to result in smart diapers to alert for an early diaper change. The design and fabrication strategies presented in this work could also be leveraged for the development of wearable, self-powered, and recyclable sensors and actuators in the future.
- Published
- 2022
44. Fabrication of paper-based analytical devices using a PLA 3D-printed stencil for electrochemical determination of chloroquine and escitalopram
- Author
-
Ivana Cesarino, Rafael Plana Simões, Martin K. L. Silva, Guilherme dos Santos Sousa, and Universidade Estadual Paulista (UNESP)
- Subjects
Detection limit ,Materials science ,Fabrication ,3D-printing ,Short Communication ,Nanotechnology ,Chloroquine ,Electrochemical paper-based analytical devices (ePADs) ,Condensed Matter Physics ,Stencil ,Dielectric spectroscopy ,Conductive ink ,Escitalopram ,Electrode ,Electrochemistry ,General Materials Science ,Differential pulse voltammetry ,Electrical and Electronic Engineering ,Cyclic voltammetry - Abstract
Made available in DSpace on 2022-04-28T19:46:55Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-02-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) In recent years, the use of prescribed and non-prescribed drugs has increased. Therefore, advances in new technologies and sensors for detecting molecules in natural environments are required. In this work, a 3D-printed polylactic acid stencil is used to fabricate paper-based analytical devices (ePADs). Herein, we report the use of carbon-based lab-manufactured conductive ink for the fabrication of sensors towards the detection of chloroquine and escitalopram. For each batch, eight ePADs were successfully fabricated. Firstly, the fabricated sensors were evaluated morphologically by scanning electron microscopy and electrochemically by cyclic voltammetry and electrochemical impedance spectroscopy experiments. The sensors displayed a well-defined voltammetric profile in the presence of the redox couple, when compared to a commercial carbon screen-printed electrode. Differential pulse voltammetry conducted the detection of chloroquine and escitalopram with detection limits of 4.0 and 0.5 µmol L−1, respectively. The ePADs fabricated using the 3D stencil are here presented as alternatives for the fabrication of electrochemical analytical devices. Department of Bioprocess and Bioengineering School of Agriculture São Paulo State University (UNESP), Avenida Universitária, no. 3780, SP Department of Bioprocess and Bioengineering School of Agriculture São Paulo State University (UNESP), Avenida Universitária, no. 3780, SP FAPESP: 2017/24274-3
- Published
- 2022
45. Engineered Surface for High Performance Electrodes on Paper
- Author
-
Elena Palmieri, Luca Montaina, Giuseppina Polino, Matteo Bonomo, Gioele Giordanengo, Claudia Barolo, Gaio Paradossi, Francesca Brunetti, Emanuela Tamburri, and Silvia Orlanducci
- Subjects
History ,Polymers and Plastics ,Large area paper electrodes ,General Physics and Astronomy ,Surfaces and Interfaces ,General Chemistry ,Condensed Matter Physics ,Settore CHIM/03 ,Green electrodes ,Wearable devices ,Industrial and Manufacturing Engineering ,Surfaces, Coatings and Films ,Settore CHIM/02 ,Green polymeric coatings ,Conductive polymer electrodes ,Business and International Management ,Flexible paper electronics - Published
- 2022
46. Quantitative Analysis of Trace Metals in Aqueous Solutions by Laser Induced Breakdown Spectroscopy Combined with Filter Paper Assisted Analyte Enrichment
- Author
-
Q. Gao, H. Qin, J. Xiu, and Sh. Liu
- Subjects
Detection limit ,Analyte ,Materials science ,Aqueous solution ,Filter paper ,Calibration curve ,010401 analytical chemistry ,Analytical chemistry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,Metal ,visual_art ,visual_art.visual_art_medium ,Laser-induced breakdown spectroscopy ,0210 nano-technology ,Spectroscopy - Abstract
The sensitive quantitative analysis of trace heavy metallic elements (Cd, Mn, Cr, and Cu) in aqueous solutions was achieved successfully through the combination of filter paper enrichment with laser-induced breakdown spectroscopy. Filter paper was enriched with 0.4 mL aqueous solutions to form a homogeneous sample layer on the surface of the metallic target. Considering the limits of detection, the values deduced with calibration curves already exhibited the high performance of the proposed method at several hundred or 10 μg/L (Cd 0.165, Mn 0.035, Cr 0.012, and Cu 0.078 mg/L), lower than or comparable to those using other similar methods. The LIBS results agreed reasonably well with those from ICP-MS for real samples. All results showed that our method was suitable and accurate for rapid on-site detection of trace metals in aqueous solutions. This indicates that filter paper enrichment combined with laser-induced breakdown spectroscopy is a feasible approach to wastewater quality monitoring.
- Published
- 2020
47. Surface modification of clay‐coated paper by atmospheric‐pressure plasma in air
- Author
-
Vlasta Štěpánová, Zlata Kelar Tučeková, Dušan Kováčik, Miroslav Zemánek, Monika Stupavská, and Mirko Černák
- Subjects
010302 applied physics ,Coated paper ,Materials science ,Analytical chemistry ,Atmospheric-pressure plasma ,02 engineering and technology ,Surfaces and Interfaces ,General Chemistry ,Dielectric barrier discharge ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Surface energy ,Surfaces, Coatings and Films ,Contact angle ,Volume (thermodynamics) ,0103 physical sciences ,Materials Chemistry ,Surface modification ,Wetting ,0210 nano-technology - Abstract
The aim of this work was the wettability improvement of clay-coated paper by ambient air plasma exposure. Industrial corona with a volume dielectric barrier discharge in cylindrical configuration was used as a plasma source; the exposure times varied from 0.25 up to 5 s. Water contact angle (WCA) measurement and surface free energy (SFE) evaluation were carried out for the estimation of wettability changes. Plasma treatment in the duration of 0.25 s was sufficient to decrease the WCA almost to the half of the original value, which was 76 degrees. SFE of paper has increased by 40%-50% after plasma treatment. Long-term ageing effect study of treated samples was carried out up to 3 months after the treatment. WCA did not reach the original value even after 3 months, and it was still 20%-30% lower. O/C ratio increased from 0.7 to 1.8 in case of 5-s plasma treatment, and the new chemical bonds (C=O, O-C=O) were created on the surface.
- Published
- 2020
48. The Detection of Cu2+ Ions Using Paper-Based Silver Nanoparticles as a Colorimetry Indicator
- Author
-
Yasman, Arie Listyarini, Windri Handayani, Nur Intan Pratiwi, and Cuk Imawan
- Subjects
Materials science ,Mechanical Engineering ,010401 analytical chemistry ,Cu2 ions ,Paper based ,010501 environmental sciences ,Condensed Matter Physics ,01 natural sciences ,Silver nanoparticle ,0104 chemical sciences ,Mechanics of Materials ,General Materials Science ,Colorimetry ,0105 earth and related environmental sciences ,Nuclear chemistry - Abstract
The detection of chemical pollution in an ecosystem requires rapid and accurate analysis in the field. The method presented here can help minimize preparation time and simple detection of the metal ions. Silver nanoparticles are known for their surface plasmon resonance characteristics that visibly display distinctive colors; this makes it possible to develop as colorimetric indicators. In this study, silver nanoparticles were synthesized on paper using velvet apple (Diospyros discolor Willd.) leaf extract as the Ag+ reducing agent. The paper was immersed in the water extract for 1 hour and for 24 hours. The formation of silver nanoparticles was indicated by the change in the paper’s color from white to light brown and dark brown. Furthermore, the paper was tested using several types of metal ions, namely, Cu2+, Mn2+, Pb2+, Zn2+, Mg2+, Ni2+ and Co2+. For all types of metal ions, the paper’s color changed selectively while detecting Cu2+ ions. The paper-based silver nanoparticles were sensitive enough to detect Cu2+ ions starting at concentrations of 100 mg/L. The Transmission Electron Microscope (TEM) revealed that the silver nanoparticles tended to aggregate after the addition of Cu2+ ions, which caused changes in the size and LSPR of the nanoparticles. This potential method needs further refinement and development to enhance the sensitivity of the paper-based colorimetric indicator, so that it can detect Cu2+ at lower concentrations.
- Published
- 2020
49. A Performance Study of CNT/TiO2/ PVA Loaded on the Paper Filter for Benzene Treatment from Cigarette Smoke
- Author
-
Mathana Wongaree and Adisak Bootwong
- Subjects
chemistry.chemical_compound ,Materials science ,chemistry ,Mechanics of Materials ,Mechanical Engineering ,Paper filter ,Cigarette smoke ,General Materials Science ,Composite material ,Condensed Matter Physics ,Benzene ,Nanomaterials - Abstract
This work has studied the performance of benzene treatment from cigarette smoke using the prepared CNT/TiO2/PVA loaded on the paper filter in the air purifier reactor. CNT/TiO2 nanomaterial was prepared from a mixture of carbon nanotubes modified with sulfuric acid and titanium dioxide by a simple mixing method in the ambient temperature. CNT/TiO2 nanomaterial was then loaded on the paper filter by a filtrating technique using 12%w/v polyvinyl alcohol (PVA) as a co-polymer. The weight of CNT/TiO2 loaded on the paper filter was fixed at 3 g. The ratios of CNT: TiO2 was varied at 1:5, 1:10, and 1:15 w/w, respectively. The performance of air purifier using CNT/TiO2/PVA loaded on the paper filter with various ratios was investigated on the photocatalytic activity of benzene treatment from cigarette smoke under visible light. The decreased benzene concentrations were analyzed by GC-FID. As the results, the ratio of CNT/TiO2 loaded on the paper filter at 1:10 showed the highest performance by up to 45%, while the ratio of CNT/TiO2 at 1:15 showed 30% and CNT/TiO2 at 1:5 was the lowest of 22%, respectively. This is because adding the optimum CNT to TiO2 can be improved the adsorption efficiency and the ability to degrade benzene from cigarette smoke. Additionally, CNT also assists in reducing the recombination of TiO2 particles that effect to the high performance on the photocatalytic activity. Therefore, the prepared CNT/TiO2/PVA loaded on the paper filter could be used for the air treatment.
- Published
- 2020
50. Effects of Relative Humidity and Paper Geometry on the Imbibition Dynamics and Reactions in Lateral Flow Assays
- Author
-
Debayan Das, Tarun Singh, Isteaque Ahmed, Manaswini Masetty, and Aashish Priye
- Subjects
SARS-CoV-2 ,Electrochemistry ,COVID-19 ,Humans ,RNA, Viral ,Humidity ,General Materials Science ,Surfaces and Interfaces ,Condensed Matter Physics ,Porosity ,Spectroscopy - Abstract
Lateral flow assays and paper microfluidics have the potential to replace benchtop instrumented medical diagnostic systems with instrument-free systems that rely on passive transport of liquid through micro-porous paper substrates. Predicting the imbibition dynamics of liquid through dry paper substrates is mostly modeled through the Lucas-Washburn (LW) equations. However, the LW framework assumes that the fluid front exhibits a sharp boundary between the dry and wet phases across the liquid imbibition interface. Additionally, the relative humidity in the environment results in moisture trapped within the pores of the paper substrates as the paper attains an equilibrium with the ambient air. Here, we apply a two-phase transport framework based on Brooks and Corey's model to capture imbibition dynamics on partially saturated paper substrates. The model is experimentally validated and is then used to predict the liquid-paper imbibition dynamics in simulated environments with 1-70% relative humidity. The model was also used to determine the saturation gradient of liquid along the imbibition interface of the paper substrate. Insights from these studies enabled us to determine the mechanism of the liquid transport in partially saturated porous paper substrates. The model also enabled us to evaluate the optimal paper shapes and relative humidity of the environment that maximize imbibition rates and minimize imbibition front broadening. Finally, we evaluate the effect of moisture content of paper on the rate of paper-based biochemical reaction by amplifying a sequence of the SARS-CoV-2 RNA target via reverse transcriptase loop-mediated isothermal amplification. Taken together, this study provides some important guidelines to academic and applied researchers working in point-of-care diagnostics to develop paper-based testing platforms that are capable of functioning in a robust manner across multiple environmental conditions.
- Published
- 2022
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