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Self-Powered Room-Temperature Ethanol Sensor Based on Brush-Shaped Triboelectric Nanogenerator

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Research 2021年第1期2021卷 531-541页

作者： Jingwen Tian Fan Wang Yafei Ding Rui Lei Yuxiang Shi Xinglin Tao Shuyao Li Ya Yang Xiangyu Chen CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Highly sensitive ethanol sensors have been widely utilized in environmental protection,industrial monitoring,and drink-driving *** this work,a fully self-powered ethanol detector operating at room temperature has been developed based on a triboelectric nanogenerator(TENG).The gas-sensitive oxide semiconductor is selected as the sensory component for the ethanol detection,while the resistance change of the oxide semiconductor can well match the“linear”region of the load characteristic curve of ***,the output signal of TENG can directly reveal the concentration change of ethanol *** accelerator gearbox is applied to support the operation of the TENG,and the concentration change of ethanol gas can be visualized on the Liquid Crystal *** fully self-powered ethanol detector has excellent durability,low fabrication cost,and high selectivity of 5 ***,the ethanol detector based on TENG not only provides a different approach for the gas detection but also further demonstrates the application potential of TENG for various sensory devices.

关键词： generator ethanol durability

Theoretical study on rotary-sliding disk triboelectric nanogenerators in contact and non-contact modes

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Nano Research 2016年第4期9卷 1057-1070页

作者： Tao Jiang Xiangyu Chen Keda Yang Changbao Han Wei Tang Zhong Lin Wang beijing institute of nanoenergy and nanosystems Chinese Academy of Sciences Beijing 100083 China Computer Network Information Center Chinese Academy of Sciences Beijing 100190 China School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0245 USA

The triboelectric nanogenerator （TENG） has emerged as a new and effective mechanical energy harvesting technology. In this work, a theoretical model for a rotary-sliding disk TENG with grating structure was constructed, including the dielectric-to-dielectric and conductor-to-dielectric cases. The finite element method （FEM） was utilized to characterize the fundamental physics of the rotary- sliding disk TENG working in both contact and non-contact modes. The basic properties of disk TENG were found to be controlled by the structural parameters such as tribo-surface spacing, grating number, and geometric size. From the FEM calculations, an approximate V-Q-a relationship was built through the inter- polation method, and then the TENG dynamic output characteristics with arbitrary load resistance were numerically calculated. Finall~ the dependencies of output power and matched resistance on the structural parameters and rotation rate were revealed. The present work provides an in-depth understanding of the working principle of the rotary-sliding disk TENG and serves as important guidance for optimizing TENG output performance in specific applications.

关键词： rotary-sliding disk triboelectric nanogenerator finite element method output characteristics continuous fraction interpolation

Self-powered electrochemical water treatment system for pollutant degradation and bacterial inactivation based on high-efficient Co(OH)_(2)/Pt electrocatalyst

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Nano Research 2023年第2期16卷 2192-2198页

作者： Zhuo Wang Xi Liang Zhirong Liu Tian Huang Shaobo Wang Shuncheng Yao Yiming Ding Jiaming Zhang Xingyi Wan Zhong Lin Wang Linlin Li beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on nanoenergy Research School of physical Science and TechnologyGuangxi UniversityNanning 530004China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332-0245USA

Electrochemical system with electro-Fenton reaction is an effective pathway for oxidative degradation of refractory organic pollutants for water ***,the method is limited by the low catalytic efficiency and high electrical cost in practical *** work presents a self-powered and high-efficient electrochemical system for water treatment including pollutant degradation and bacterial inactivation,which is composed of a self-powered triboelectric nanogenerator(TENG)converting mechanical energy into electrical energy,a power management circuit integrated with a supercapacitor to store the harvesting electrical energy temporarily,and an electrochemical setup integrated with two-dimentional Co(OH)_(2)/Pt nanosheet as *** nanocatalyst,ultrafine Pt nanoparticles(Pt NPs)loaded on Co(OH)_(2) nanosheet(Co(OH)_(2)/Pt),is synthesized by a facile one step hydrothermal reaction without any surfactant,which can improve H_(2)O_(2)and hydroxyl radical production via redox *** self-powered electrocatalytic system is able to degrade nearly 100%of organic pollutant within 100 min,and efficiently kill *** work shows great potential to develop high-efficient and self-powered electrochemical water treatment system through integrating TENG and nanocatalyst.

关键词： triboelectric nanogenerator electro-catalysis self-powered water treatment nanocatalyst

A bioinspired,self-powered,flytrap-based sensor and actuator enabled by voltage triggered hydrogel electrodes

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Nano Research 2023年第7期16卷 10198-10205页

作者： Zhiliang Hou Xuebiao Li Xinru Zhang Wendong Zhang Zhong Lin Wang Hulin Zhang College of Information and Computer Taiyuan University of TechnologyTaiyuan 030024China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332USA beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400China

Because of its adaptive interfacial property,soft sensors/actuators can be used to perform more delicate tasks than their rigid ***,plant epidermis with a waxy cuticle layer challenges stable and high-fidelity non-invasive electrophysiology since the conventional electrodes are invasive,easily detached from plants,and require complicated setup ***,we report a bioinspired sensor and actuator created by using a conformable electrode interface as an electrical modulation unit on a Venus *** conformable electrode,by employing an adhesive hydrogel layer,can achieve the merits of low impedance,stretchable,biocompatible,reusable,and transparent enough for normal chlorophyll activity to *** to the high sensitivity of a flytrap to a triggering mechanical stimulation,a plant sensor matrix based on flytraps has been demonstrated by capturing the stimulated action potential(AP)signals from upper epidermis,which can orient honeybee colonies by their touch during collecting ***,via frequency-dependent AP modulation,an autonomous on-demand actuation on a flytrap is *** flytrap actuator can be controlled to responsively grasp tiny objects by the modulated signals triggered by a triboelectric nanogenerator(TENG).This work paves a way of developing autonomous plant-based sensors and actuators toward smart agriculture and intelligent robots.

关键词： self-powered hydrogel electrode sensor and actuator flytrap triboelectric nanogenerator

Nanozymes for regulation of reactive oxygen species and disease therapy

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Chinese Chemical Letters 2021年第9期32卷 2715-2728页

作者： Yujie Dai Yiming Ding Linlin Li beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on nanoenergy Research School of Chemistry and Chemical EngineeringSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004China

With high catalytic activity and stability,nanozymes have huge advantage in generating or eliminating the reactive oxygen species(ROS)due to their intrinsic enzyme-mimicking abilities,therefore attracting wide attention in ROS-related disease *** better design nanozyme-based platforms for ROSrelated biological application,we firstly illustrate the catalytic mechanism of different activities,and then introduce different strategies for using nanozymes to augment or reduce ROS level for the applications in cancer therapy,pathogen infection,neurodegeneration,***,the challenges and future opportunities are proposed for the development and application of nanozymes.

关键词： Nanozyme Reactive oxygen species(ROS) Cancer therapy Peroxidase Oxidases Photodynamic therapy

Flexible,stretchable,and transparent InGaN/GaN multiple quantum wells/polyacrylamide hydrogel-based light emitting diodes

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Nano Research 2022年第6期15卷 5492-5499页

作者： Jiwei Chen Jiangwen Wang Keyu Ji Bing Jiang Xiao Cui Wei Sha Bingjun Wang Xinhuan Dai Qilin Hua Lingyu Wan Weiguo Hu Center on nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Visualization is a direct,efficient,and simple interface method to realize the interaction between human and machine,whereas the flexible display unit,as the major bottleneck,still deeply hinders the advances of wearable and virtual reality *** obtain flexible optoelectronic devices,one of the effective methods is to transfer a high-efficient and long-lifetime inorganic optoelectronic film from its rigid epitaxial substrate to a foreign flexible/soft ***,piezo-phototronic effect is a fundamental theory for guiding the design of flexible optoelectronic ***,we demonstrate a flexible,stretchable,and transparent InGaN/GaN multiple quantum wells(MQWs)/polyacrylamide(PAAM)hydrogel-based light emitting diode coupling with the piezo-phototronic *** quantum well energy band and integrated luminous intensity(increased by more than 31.3%)are significantly modulated by external mechanical stimuli in the *** from the small Young's modulus of hydrogel and weak Van der Waals force,the composite film can endure an extreme tensile condition of about 21.1%stretching with negligible tensile strains transmitted to the InGaN/GaN *** the stable photoluminescence characteristics can be ***,the hydrogen-bond adsorption and excellent transparency of the hydrogel substrate greatly facilitate the packaging and luminescence of the optoelectronic *** thus,such a novel integration scheme of inorganic semiconductor materials and organic hydrogel materials would help to guide the robust stretchable optoelectronic devices,and show great potential in emerging wearable devices and virtual reality applications.

关键词： InGaN/GaN multiple quantum wells hydrogel light emitting diode(LED) piezo-phototronic effect

Au nanocomposite enhanced electret film for triboelectric nanogenerator

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Nano Research 2018年第6期11卷 3096-3105页

作者： Bao Dong Chen Wei Tang Chi Zhang Liang Xu Lai Pan Zhu Lei Jing Yang Chuan He Jian Chen Long Liu Tao Zhou Zhong Lin Wang beijing institute of nanoenergy and nanosystems Chinese Academy of Sciences Beijing 100083 China CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology (NCNST) Beijing 100190 China School of Material Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA

A triboelectric nanogenerator （TENG） with an organic nanocomposite electret thin film as the triboelectric layer for mechanical energy harvesting was investigated systematically. In combination with corona charging, a TENG was fabricated by using embedded-nanocapacitor-structure polytetrafluoroethylene （PTFE） impregnated with gold nanoparticles （Au-NPs）. The output performances, stability, and durability of the TENGs with Au-PTFE nanocomposite films were characterized after being washed in water. It was found that the output current increases by 70% and the equivalent surface charge density （ESCD） reaches 85 μC/m^2 in comparison to the virgin PTFE film. Such outstanding performance is likely due to the equivalent nanocapacitors between the Au-NPs and PTFE molecules, which serve as nano charge traps in the nanocomposite electret film under negative high-voltage corona charging. This work not only expands the practical applications of TENGs, but also opens up new possibilities for the development of high performance triboelectric materials.

关键词： equivalent nanocapacitor structure polytetrafluoroethylene(PTFE) electret thin film gold nanoparticles equivalent surface charge density

Ultra-antifreeze,ultra-stretchable,transparent,and conductive hydrogel for multi-functional flexible electronics as strain sensor and triboelectric nanogenerator

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Nano Research 2022年第6期15卷 5461-5468页

作者： Xinhuan Dai Yong Long Bing Jiang Wenbin Guo Wei Sha Jiangwen Wang Zifeng Cong Jiwei Chen Bingjun Wang Weiguo Hu Chinese Academy of Sciences Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

Conductive hydrogels have become one of the most promising candidates for flexible electronics due to their excellent mechanical flexibility,durability of deformation,and good electrical ***,in real applications,severe environments occur frequently,such as extremely cold *** hydrogels always lack anti-freeze and anti-dehydration ***,the functions of electronic devices based on traditional hydrogels will quickly fail in extreme ***,the development of environmentally robust hydrogels that can withstand extremely low temperatures,overcome dehydration,and ensure the stable operation of electronic devices has become increasingly ***,we report a kind of graphene oxide(GO)incorporated polyvinyl alcohol-polyacrylamide(PVA-PAAm)double network hydrogel(GPPDhydrogel)which shows excellent anti-freeze *** GPPD-hydrogel exhibits not only good flexibility and ultra-high stretchability up to 2,000%,but ensures a high sensitivity when used as the strain sensor at−50°*** importantly,when serving as the electrode of a sandwich-structural triboelectric nanogenerator(TENG),the GPPD-hydrogel endows the TENG high and stable output performances even under−80°***,the GPPD-hydrogel is demonstrated long-lasting moisture retention over 100 *** GPPD-hydrogel provides a reliable and promising candidate for the new generation of wearable electronics.

关键词： triboelectric nanogenerators antifreeze ultra-stretchable hydrogels strain sensors multi-functional flexible electronics

Triboelectric nanogenerator as a new technology for effective PM2.5 removing with zero ozone emission

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Progress in Natural Science:Materials International 2018年第2期28卷 99-112页

作者： Chuan He Zhong Lin Wang beijing institute of nanoenergy and nanosystems Chinese Academy of Sciences School of Materials Science and Engineering Georgia Institute of Technology CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology (NCNST)

Particles matters(PMs) have raised serious concerns due to their great impact on human health. Coupling triboelectric effect and electrostatic induction, triboelectric nanogenerator(TENG) has demonstrated as a practical sustainable power source for portable devices. The characteristics of TENG, such as high electric field and high output power, make it a promising technology in air cleaning applications. Here, the mechanism of the TENG and its application in self-powered air cleaning technologies are reviewed. Using the TENG as a voltage source, a self-powered air cleaning system for removing SOand PMs is developed; and the removal efficiency of nanofiber filters is greatly enhanced due to electrostatic attraction. More importantly, the technology is not only most effective for removing nano-scale particles that cannot be effectively filtered using conventional fiber-film filters, but also produces no ozone emission. Besides being an independent power supply, a vibration TENG based triboelectric filter is designed to effectively capture the PMs from automobile exhaust fumes. Hence, the TENG demonstrates its great potential in self-powered air cleaning applications.

关键词： Triboelectric nanogenerator Power source Particulate matter Air cleaning Nanofiber filter