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triboelectrification induced UV emission from plasmon discharge

Nano Research 2015年第1期8卷 219-226页

作者： Chang Bao Han Chi Zhang Jingjing Tian Xiaohui Li Limin Zhang Zhou Li Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China 'School of Material Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA

UV is a high-energy electromagnetic radiation that has been widely used in industrial production and the scientific research domain. In this work, a deep UV light emission was obtained using triboelectrification induced plasma discharge without any extra power supply. By a mechanical friction between polymer and quartz glass, the triboelectric charges cause a changing electric field, which may bring plasma discharge of low pressure gas （Ar-Hg） and give out 253.7 nm irradiation. The UV light caused by continuous friction can excite a trichromatic phosphor and afford a bright white light emission. A UV sterilization experiment shows that -98% of Escherichia coil can be killed in 30 min by UV irradiation, which reveals that a self-powered sterilization apparatus with good sterilization effect was fabricated. This work provides a novel design to fabricate a self- powered UV light emitting device using low-frequency mechanical friction and realizes the coupling of triboelectrificafion and plasma luminescence, which may further expand the application of UV light in special circumstances.

关键词： triboelectrification light emitting plasma discharge UV light sterilization

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Effect of chemical conditioning on the triboelectrification of coal and mineral particles

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Mining Science and Technology 2010年第3期20卷 421-424页

作者： WANG Haifeng CHEN Qingru ZHANG Xinxi TAN Zhihai WANG Shuai ZHOU Nianxin Key Laboratory of Coal Processing and Efficient Utilization China University of Mining & Technology Xuzhou 221008 China School of Chemical Engineering & Technology China University of Mining & Technology Xuzhou 221116 China

Chemical conditioning was used to modify the triboelectrification of coal and mineral *** chemicals tested included starch,lignin,kerosene,ethanol,acetic acid,salicylic acid,sodium oleate,Sodium Hexametaphosphate(SH),sodium silicate, Sodium Dodecylbenzenesulfonate(SDBS),Sodium Bicarbonate(SB) and ammonia.A high-speed,dry mixing method was *** charge-to-mass ratio of the coal and mineral samples,both untreated and treated,was tested using a Faraday cup. Dielectric constants were determined by measuring *** is found that the selectivity of the additives toward coal or minerals is not *** acid is the optimal additive to enhance the triboelectrification performance of coal ***, lignin and sodium oleate are suitable for removal of ***,sodium silicate,SDBS,SB and ammonia are suitable additives for the removal of ash-forming minerals.

关键词： chemical conditioning triboelectrification coal triboelectrostatic separation coal particle mineral particle

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A self-powered gas sensor based on PDMS/Ppy triboelectric-gas-sensing arrays for the real-time monitoring of automotive exhaust gas at room temperature

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Science China Materials 2019年第10期62卷 1433-1444页

作者： Haoxuan He Mengyang Zhang Tianming Zhao Hui Zeng Lili Xing Xinyu Xue School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China College of Sciences Northeastern UniversityShenyang 110819China

A new self-powered active gas sensor for realtime monitoring of automotive exhaust gas was *** pipe-shaped device was fabricated from polydimethylsiloxane/polypyrrole(PDMS/Ppy)triboelectric gas-sensing unit *** gas-sensing units can actively convert the mechanical energy of gas flow into a triboelectric *** output current signal depends on the species and concentrations of the target chemical gases(CO,NH3,NO)in the gas flow,and thus can be used as a sensing *** device consists of seven gas-sensing units with different Ppy *** the different sensing units respond to the gases in different ways,the device can differentiate between gas *** working mechanism is attributed to the coupling effect between the triboelectric effect of PDMS/Ppy and the gas-sensing properties of *** device can be installed in the tailpipe of an automobile,and can thus analyze the exhaust gas in real time without the need for any external electrical *** results of the present study spur a new research direction for the development of automotive exhaust gas monitoring systems,thus playing an important role in the detection of air pollution.

关键词： self-powered gas sensing triboelectrification automotive exhaust gas coupling effect

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Fundamental theories and basic principles of triboelectric effect: A review

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Friction 2019年第1期7卷 2-17页

作者： Shuaihang PAN Zhinan ZHANG School of Mechanical Engineering Shanghai Jiao Tong University School of Mechanical & Aerospace Engineering University of California Los Angeles

Long-term observation of the triboelectric effect has not only proved the feasibility of many novel and useful tribo-devices(e.g., triboelectric nanogenerators), but also constantly motivated the exploration of its mysterious nature. In the pursuit of a comprehensive understanding of how the triboelectric process works, a more accurate description of the triboelectric effect and its related parameters and factors is urgently required. This review critically goes through the fundamental theories and basic principles governing the triboelectric process. By investigating the difference between each charging media, the electron, ion, and material transfer is discussed and the theoretical deduction in the past decades is provided. With the information from the triboelectric series, interesting phenomena including cyclic triboelectric sequence and asymmetric triboelectrification are precisely analyzed. Then, the interaction between the tribo-system and its operational environment is analyzed, and a fundamental description of its effects on the triboelectric process and results is summarized. In brief, this review is expected to provide a strong understanding of the triboelectric effect in a more rigorous mathematical and physical sense.

关键词： triboelectric effect triboelectrification triboelectric nanogenerators(TENGs) interface

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Effect of contact- and sliding-mode electrification on nanoscale charge transfer for energy harvesting

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Nano Research 2016年第12期9卷 3705-3713页

作者： Yu Sheng Zhou Shengming Li Simiao Niu Zhong Lin Wang School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA Department of Mechanical Engineering Tsinghua University Beijing 100084 China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China

The process of charge transfer based on triboelectrification （TE） and contact electrification （CE） has been recently utilized as the basis for a new and promising energy harvesting technology, i.e., triboelectric nanogenerators, as well as self- powered sensors and systems. The electrostatic charge transfer between two surfaces can occur in both the TE and the CE modes depending on the involvement of relative sliding friction. Does the sliding behavior in TE induce any fundamental difference in the charge transfer from the CE？ Few studies are available on this comparison because of the challenges in ruling out the effect of the contact area using traditional macro-scale characterization methods. This paper provides the first study on the fundamental differences in CE and TE at the nanoscale based on scanning probe microscopic methods. A quantitative comparison of the two processes at equivalent contact time and force is provided, and the results suggest that the charge transfer from TE is much faster than that from CE, but the saturation value of the transferred charge density is the same. The measured frictional energy dissipation of -11 eV when the tip scans over distance of I A sheds light on a potential mechanism： The friction may facilitate the charge transfer process via electronic excitation. These results provide fundamental guidance for the selection of materials and device structures to enable the TE or the CE in different applications; the CE mode is favorable for frequent moderate contact such as vibration energy harvesting and the TE mode is favorable for instant movement such as harvesting of energy from human walking.

关键词： energy harvesting contact electrification triboelectrification charge transfer electronic excitation scanning Kelvin probemicroscopy

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A supportive electrostatic model of the COVID-19 airborne transmission

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第3期12卷 1-13页

作者： Francesco Lattarulo Dipartimento di Ingegneria Elettrica e dell’Informazione Politecnico di Bari Via Orabona4-70126 BariItaly

A mechanism-oriented model is proposed here as a speculative but robust attempt to understand whether there might be any increased risk of electrostatically induced contamination,with relevant consequences from the epidemiological *** could also be the case for the COVID-19 spreading because an amount of micro-sized droplet nuclei,often carrying net electric charge,are expected to be electro-dynamically involved in a physical process originated by the natural and unperceivable static electrification of human *** effects of the triboelectric charging have long been successfully tested because the phenomenon under examination is also implied in the genesis of the electrostatic discharge(ESD),a demanding key objective in the special context of electromagnetic compatibility(EMC).Therefore,the ultimate purpose of this technical paper is to provide valuable insights into infection control,building on what is already being done for maintaining static-safe *** stature of the applied model can be further appreciated because some currently observed climate-dependent and sexlinked different vulnerabilities to COVID-19 are critically examined by unique sound *** ultimately focus attention on ambient relative humidity and worn shoes,the latter differing for typology,size and material,for their integrated control of the inadvertent human aptitude to buildup *** would appear as a dreadful prerequisite for charge bearing droplets in the airborne state to be efficiently attracted/repelled according to the described electrostatic mechanism.

关键词： triboelectrification human body model COVID-19

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