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In-detailed investigation of Fe3O4 powder derived from waste toner material for supercapacitor electrode application

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AIP Conference Proceedings 2024年第1期3170卷

作者： Pranav M. Jambhale Vijaykiran N. Narwade Mohammed Shariq Kashinath A. Bogle Mahendra D. Shirsat Department of Electronics Dr. Babasaheb Ambedkar Marathwada University Aurangabad 431 004 India RUSA-Centre for Advanced Sensor Technology Dr. Babasaheb Ambedkar Marathwada University Aurangabad 431004 India Department of Physics N.E.S. Science college Nanded 431605 India Centre for Nanotechnology Research Vellore Institute of Technology (VIT) Vellore 632 014 Tamil Nadu India School of Physical Sciences Swami Ramanand Teerth Marathwada University Nanded 431 606 India

In the present investigations, we exhibit the efficacy of Fe3O4 as a supercapacitor electrode material. The working material Fe3O4 was acquired via recovering waste toner material from printers, followed by an annealing process and magnetic separation a few times to obtain the final product as Fe3O4. The obtained material is used in an electroactive manner and then deposited on a Ni-foam substrate to develop a supercapacitor electrode. A range of characterizations characterized the prepared electrodes’ physicochemical characteristics and electrochemical investigations. Herewith, we have investigated the molarity effect of KOH electrolyte on the fabricated electrode. The specific capacitance of the electrode was found to be 363 F/g at 10 mV/s within the wide potential window of 1.4 V. Additionally, the electrochemical cyclic stability of the Fe3O4 electrode occurred to be 98 % after 1000 cycles. This shows recycled Fe3O4 still possesses good properties as electrode material for supercapacitor applications and may encourage repurposing waste toner to restrain electronic trash.

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Development of high-performance supercapacitor using faceted ZIF-67 MOF synthesized by facile chemical route

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AIP Conference Proceedings 2024年第1期3170卷

作者： Prashant K. Kasare Vijaykiran N. Narwade Mohammed Shariq Kashinath A. Bogle Mahendra D. Shirsat Department of Electronics Dr. Babasaheb Ambedkar Marathwada University Aurangabad 431 004 India RUSA-Centre for Advanced Sensor Technology Dr. Babasaheb Ambedkar Marathwada University Aurangabad 431004 India Department of Physics N.E.S. Science College Nanded 431605 India Centre for Nanotechnology Research Vellore Institute of Technology (VIT) Vellore 632 014 Tamil Nadu India School of Physical Sciences Swami Ramanand Teerth Marathwada University Nanded 431 606 India

Supercapacitors with meritorious characteristics like high-power density and long cyclic stability have recently grabbed wide research attention. Between traditional capacitors and rechargeable batteries, supercapacitors represent a new type of energy storage device. ZIF-67 Metal-organic framework synthesized simply by facile chemical route. The ZIF-67 MOF was characterized using X-ray Diffraction, UV-visible spectroscopy, Fourier-transform Infrared Spectroscopy, and Atomic Force Microscopy. The present investigations deal with the electrochemical (CV, EIS, GCD) performance of fabricated ZIF-67 electrodes in 2 M, 4 M, and 6 M KOH electrolyte solutions in the potential window of 0 - 0.5 V. The electrode shows efficient results in 6 M KOH with a specific capacitance value of 164 Fg−1 at a scan rate of 10 mVs−1 compared to 72 Fg−1 and 99.8 Fg−1 for 2 M and 4 M, respectively. The ZIF-67 MOF electrodes show up to 95% retention over the 500 repeated charge−discharge cycles. This method facilitates a simple approach to the synthesis of ZIF-67 MOF and its applicability as an energy device.

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Development and application of nanogenerators in humanoid robotics

Nano Trends

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Nano Trends 2023年 3卷

作者： Xuecheng Qu Ze Yang Jia Cheng Zhou Li Linhong Ji State Key Laboratory of Tribology in Advanced Equipment Department of Mechanical Engineering Tsinghua University Beijing 100084 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nonenergy and Nanosystems Chinese Academy of Sciences Beijing 101400 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing 100049 China

Nanogenerators have garnered significant attention in the field of robotics due to their high performance, ease of design and fabrication, and lightweight nature. By utilizing such sensing systems, machines can be endowed with specific sentience capabilities. Moreover, sensors that based on nanogenerators can operate continuously without requiring an external power source. The following paper presents a comprehensive review of recent developments and applications of nanogenerator-based sensors in robotics in recent years. These sensors are categorized according to their sensory functions (including tactile, hearing, smell, vision and displacement, etc.), with a focus on their working mechanisms, materials and structures. Furthermore, this review investigates the usage of these devices in flexible manipulators and human-machine interfaces. Finally, the challenges and opportunities pertaining to nanogenerator-based sensors are discussed.

关键词： Nanogenerator Humanoid sensor Robotics Soft finger Human-machine interaction

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Micropatterned piezoelectric films induced by modulated corona field for weak signal detection

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Chemical Engineering Journal 2025年 517卷

作者： Fu Lv Chenghang Yu Bing Liu Jiamin Lin Zijian Hong Yongjun Wu Zhaohui Ren Qilong Zhang Shurong Dong Jikui Luo Juan Li Yuhui Huang School of Materials Science and Engineering Cyrus Tang Center for Sensor Materials and Applications Innovation Center of Yangtze Delta Institute of Fundamental and Transdisciplinary Research Zhejiang University Hangzhou Zhejiang 310058 China Nanhu Brain-computer Interface Institute Hangzhou Zhejiang 311100 China School of Engineering Hangzhou City University Hangzhou Zhejiang 310015 China College of Electronic Information and Engineering Hangzhou Dianzi University Hangzhou Zhejiang 310018 China Zhejiang Key Laboratory of Advanced Solid State Energy Storage Technology and Applications Taizhou Institute of Zhejiang University Taizhou Zhejiang 318000 China College of Information Science and Electronic Engineering Key Lab of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang Zhejiang University Hangzhou Zhejiang 310027 China College of Materials and Science Engineering Zhejiang University of Technology Hangzhou Zhejiang 310014 China

Enhancing the inherent piezoelectricity and introducing innovative structural designs are the two fundamental strategies for enhancing the pressure sensitivity of P(VDF-TrFE)-based sensors. In this study, we propose a scalable and cost-effective manufacturing approach that utilizes a modulated corona field to create micropatterns on the surface of P(VDF-TrFE) films, and enhance their piezoelectric properties during the annealing and recrystallization process. The micropatterned P(VDF-TrFE) films exhibit a distinctive “wavy” microstructure and possess ultrahigh piezoelectric properties (d 33 ∼ 35.6 pC/N), resulting in excellent sensitivity (∼477.94 mV/kPa). To unravel the underlying mechanism responsible for this superior performance, we employ finite element modeling and phase-field simulations. Our findings reveal that the modulated corona field generates an equipotential surface with a characteristic “wavy” distribution and promotes the creation of nucleation sites for the polar β phase in P(VDF-TrFE) films. A real-time monitoring system is further exploited with the obtained micropatterned P(VDF-TrFE) films for detecting radial artery pulse signals. The results obtained from this work hold great promise for the development of highly sensitive sensors, with wide-ranging applications in healthcare and environmental monitoring.

关键词： Flexible wireless biosensors Micropatterned structure Phase-field simulations Piezoelectric polymer

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Enhanced detection of heavy metal ions using Ag nanoparticles and single-walled carbon nanotubes within Cu-based metal-organic frameworks

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Journal of Environmental Chemical Engineering 2024年第3期12卷

作者： Bodkhe, Gajanan A. More, Mayuri S. Umar, Ahmad Ibrahim, Ahmed A. Siva, Subramanian Deshmukh, Megha A. Ingle, Nikesh N. Gaikwad, Dhammajyot K. Tsai, Meng-Lin Hianik, Tibor Kim, Myunghee Shirsat, Mahendra D. Department of Food Science and Technology Yeungnam University Gyeongsangbuk-do Gyeongsan 38541 South Korea RUSA Center for Advanced Sensor Technology Department of Physics Dr. Babasaheb Ambedkar Marathwada University Maharashtra Aurangabad 431004 India Department of Chemistry College of Science and Arts and Promising Centre for Sensors and Electronic Devices (PCSED) Najran University Najran 11001 Saudi Arabia Department of Materials Science and Engineering The Ohio State University Columbus 43210 OH United States CEET Nanotechnology Centre VŠB Technical University of Ostrava Czech Republic University Department of Basic & Applied Sciences MGM University Aurangabad 431003 India Department of Physics ACS College Maharashtra Dharangaon India Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei 10607 Taiwan Department of Nuclear Physics and Biophysics Faculty of Mathematics Physics and Informatics Comenius University Bratislava 84248 Slovakia Research Institute of Cell Culture Yeungnam University Gyeongsangbuk-do Gyeongsan 38541 South Korea STEM Pioneers Training Lab Najran University Najran 11001 Saudi Arabia

Heavy metal ions (HMIs) are major water pollutants, and their toxicity for humans is a great concern for scientists and environmentalists. They are harmful to health even at trace levels;therefore, identifying and removing heavy metals from water is critical. Herein, we report highly selective and sensitive multi-analyte detection of HMIs in water using an electrochemical sensor probe based on Ag nanoparticles and single-walled carbon nanotubes incorporating copper benzene tri-carboxylate metal–organic frameworks (Ag/SWNTs@CuBTC-MOFs). The materials were characterized using FTIR, XPS, XRD, and FE-SEM with EDX mapping, TEM, TG-DTA, BET surface area, CV, and EIS. The Ag/SWNTs@CuBTC-MOF electrochemical sensor was tested by differential pulse voltammetry over a pH range of 3–10 for various HMIs. It shows high pH-dependent sensitivity towards Hg²⁺ (pH-5.0), Ni²⁺ (pH-7.0), and Fe³⁺ (pH-10.0) ions and a limit of detection of 1.39 nM, 2.6 nM, and 3.03 nM, respectively. The fabricated sensor probe exhibits high selectivity, good linearity, and a limit of detection below the maximum contamination limit, as the US Environmental Protection Agency suggested. © 2024 Elsevier Ltd

关键词： Ag nanoparticles CuBTC metal-organic frameworks Differential pulse voltammetry Electrochemical sensor Heavy metal ions pH-dependent selectivity Single-walled carbon nanotubes

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A Dual-Bond Crosslinking Strategy Enabling Resilient and Recyclable Electrolyte Elastomers for Solid-State Lithium Metal Batteries

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Angewandte Chemie 2024年第32期136卷

作者： Lijiang Yin Panpan Zhang Jun Yang Jia Meng Mengjing Wu Xiong Pu School of Chemistry and Chemical Engineering Center on Nanoenergy Research School of Physical Science and Technology Guangxi University Nanning 530004 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 101400 China College of Materials Science and Technology Beijing Forestry University Beijing 100083 China Key Laboratory of the Ministry of Education for Advanced Catalysis Material Institute of Physical Chemistry College of Chemistry and Materials Science Zhejiang Normal University Jinhua 321004 Zhejiang China School of Nanoscience and Enigneering University of Chinese Academy of Sciences Beijing 100049 China

Elastomeric solid polymer electrolytes (SPEs) are highly promising to address the solid-solid-interface issues of solid-state lithium metal batteries (LMBs), but compromises have to be made to balance the intrinsic trade-offs among their conductive, resilient and recyclable properties. Here, we propose a dual-bond crosslinking strategy for SPEs to realize simultaneously high ionic conductivity, elastic resilience and recyclability. An elastomeric SPE is therefore designed with hemiaminal dynamic covalent networks and Li + -dissociation co-polymer chains, where the −C−N- bond maintains the load-bearing covalent network under stress but is chemically reversible through a non-spontaneous reaction, the weaker intramolecular hydrogen bond is mechanically reversible, and the soft chains endow the rapid ion conduction. With this delicate structure, the optimized SPE elastomer achieves high elastic resilience without loading-unloading hysteresis, outstanding ionic conductivity of 0.2 mS cm −1 (25 °C) and chemical recyclability. Then, exceptional room-temperature performances are obtained for repeated Li plating/stripping tests, and stable cycling of LMBs with either LiFePO 4 or 4.3 V-class LiFe 0.2 Mn 0.8 PO 4 cathode. Furthermore, the recycled and reprocessed SPEs can be circularly reused in LMBs without significant performance degradation. Our findings provide an inspiring design principle for SPEs to address the solid-solid-interface and sustainability challenges of solid-state LMBs.

关键词： solid polymer electrolyte recyclable resilience lithium metal battery dual-bond crosslinking

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Rücktitelbild: A Dual-Bond Crosslinking Strategy Enabling Resilient and Recyclable Electrolyte Elastomers for Solid-State Lithium Metal Batteries (Angew. Chem. 32/2024)

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Angewandte Chemie 2024年第32期136卷

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Electrochemical formation of ‘synthetic receptors’ based on conducting polymers

Electrochemical formation of ‘synthetic receptors’ based o...

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International Conference on Nanomaterials in Biomedical Application and Biosensors, NAP 2019

作者： Ramanavicius, A. Tereshchenko, A. Plikusiene, I. Ratautaite, V. Deshmukh, M.A. Smyntyna, V. Oztekin, Ya. Bubniene, U. Ramanaviciene, A. Department of Physical Chemistry Faculty of Chemistry and Geosciences Vilnius University Vilnius Lithuania Laboratory of Nanotechnology State Research Institute Center for Physical Sciences and Technology Vilnius Lithuania Faculty of Chemistry and Geosciences NanoTechnas-Centre of Nanotechnology and Material Science Vilnius University Vilnius Lithuania Department of Experimental Physics Faculty of Mathematics Physics and Information Technologies Odesa I.I. Mechnikov National University Odesa Ukraine Department of Physics RUSA-Center for Advanced Sensor Technology Dr. Babasaheb Ambedkar Marathwada University AurangabadMaharashtra431 004 India Faculty of Science Department of Chemistry Selcuk University Konya Turkey

ISBN: (纸本)9789811539954

Analysis of pharmaceuticals and biologically active materials recently can be performed by biosensors, which can be based on conducting polymers. Therefore, in this Mini Review some achievements in the synthesis and application of conducting polymer—polypyrrole (Ppy), which is often used in the design of sensors and biosensors, are overviewed. Some perspective methods of conducting polymer synthesis are outlined. Significant attention has been paid to electrochemical, chemical and biochemical synthesis of conducting polymers (CPs), which were developed by authors. The applicability of polypyrrole based functional layers in the design of electrochemical biosensors is overviewed. The adaptability of enzyme— glucose oxidase (GOx), which can be applied as (i) biological recognition element— in the design of glucose biosensors, (ii) a biocatalyst—in the synthesis of some above mentioned conducting polymers, is discussed. Part of biocompatibility related aspects of some conducting polymers are also discussed and some insights in the application of polypyrrole-based coatings for implantable sensors are outlined. © Springer Nature Singapore Pte Ltd. 2020.

关键词： Conducting polymers

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Back Cover: A Dual-Bond Crosslinking Strategy Enabling Resilient and Recyclable Electrolyte Elastomers for Solid-State Lithium Metal Batteries (Angew. Chem. Int. Ed. 32/2024)

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Angewandte Chemie International Edition 2024年第32期63卷

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Corrigendum to “Scalable molten salt strategy synthesis of large-size 2D MoS 2(1-x) Se 2x alloy for boosting potassium-ion storage performance” [Mater. Today Chem. 38 (2024) 102044]

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Materials Today Chemistry 2024年 39卷

作者： Jing Li Lei Yang Tianxiang Liang Hui Wei Honglin Li Feng Hu Jinpei Hei Yefeng Liu Nannan Wang Hehe Wei Engineering Research Center of High-frequency Soft Magnetic Materials and Ceramic Powder Materials of Anhui Province Engineering Technology Research Center of Preparation and Application of Industrial Ceramics of Anhui Province School of Chemistry and Material Engineering Chaohu University 1 Bantang Road Hefei 238000 PR China Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province School of Materials and Chemical Engineering West Anhui University Lu'an Anhui 237012 PR China Key Laboratory for Advanced Materials Center for Computational Chemistry and Research Institute of Industrial Catalysis East China University of Science and Technology 130 Meilong Road Shanghai 200237 PR China

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