检索结果-南通市图书馆

Hybrid energy cell for simultaneously harvesting wind, solar, and chemical energies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2014年第11期7卷 1631-1639页

作者： Yingchun Wu Xiandai Zhong Xue Wang Ya Yang Zhong Lin Wang beijing institute of nanoenergy and nanosystems Chinese Academy of Sciences Beijing 100083 China School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332-0245 USA

We report a hybrid energy cell that can simultaneously or individually harvest wind, solar, and chemical energies to power some electronic devices. By utilizing the wind driven relative rotations between a polytetrafluoroethylene film and an etched A1 film attached on two acrylic tubes, the fabricated triboelectric nanogenerator （TENG） can deliver an open-circuit voltage of about 90 V, a short-circuit current density of about 0.5 mA/m2, and a maximum power density of 16 mW/m2, which is capable of directly lighting up 20 blue light- emitting-diodes （LEDs）. By integrating a TENG, a solar cell, and an electrochemical cell, a hybrid energy cell has been fabricated to simultaneously scavenge three different types of energies. As compared with the individual energy units, the hybrid energy cell exhibited much better performance in charging a capacitor. Moreover, we also demonstrated that the hybrid energies generated can be stored in a Li-ion battery for powering a commercial wind speed sensor and a temperature sensor. This work represents significant progress toward practical applications of hybrid energy cells, providing potential solutions for simul- taneously scavenging wind, solar, and chemical energies.

关键词： hybrid energy cell wind energy solar energy triboelectricnanogenerators electrochemical cells

A power manager system with 78% efficiency for high-voltage triboelectric nanogenerators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2017年第2期60卷 205-207页

作者： Lichuan LUO Dechun BAO Wuqi YU Zhaohua ZHANG Tianling REN beijing institute of nanoenergy and nanosystems Chinese Academy of Sciences institute of Microelectronics & Tsinghua National Laboratory for Information Science and Technology (TNLIST) Tsinghua University

Dear editor,The Internet of Things(Io T)refers to a growing trend to create relatively simple devices that interconnect and share data independent of computers or human intervention[1].In these applications,a continuous power supply system is *** are many research studies that focus on environmental energy for self-powered portable electronics,which can minimize battery consumption and extend cell *** is the field

关键词： high efficiency for high-voltage triboelectric nanogenerators A power manager system with 78

Tribotronic triggers and sequential logic circuits

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2017年第10期10卷 3534-3542页

作者： Li Min Zhang Zhi Wei Yang Yao Kun Pang Tao Zhou Chi Zhang Zhong Lin Wang beijing institute of nanoenergy and nanosystems Chinese Academy of Sciences National Center for Nanoscience and Technology Beijing 100083 China School of Material Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0245 USA

In this paper, a floating-gate tribotronic transistor （FGTT） based on a mobile triboelectric layer and a traditional silicon-based field-effect transistor （FET） is proposed. In the FGTT, the triboelectric charges in the layer created by contact electrification can be used to modulate charge carrier transport in the transistor. Based on the FGTTs and FETs, a tribotronic negated And （NAnd） gate that achieves mechanical-electrical coupled inputs, logic operations, and electrical level outputs is fabricated. By further integrating tribotronic NAnd gates with traditional digital circuits, several basic units such as the tribotronic S-R trigger, D trigger, and T trigger have been demonstrated. Additionally, tribotronic sequential logic circuits such as registers and counters have also been integrated to enable external contact triggered storage and computation. In contrast to the conventional sequential logic units controlled by electrical signals, contact-triggered tribotronic sequential logic circuits are able to realize direct interaction and integration with the external environment. This development can lead to their potential application in micro/nano-sensors, electromechanical storage, interactive control, and intelligent instrumentation.

关键词： tribotronics tribotronic transistor triboelectric nanogenerator trigger sequential logic circuits

Modeling the open circuit output voltage of piezoelectric nanogenerator

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2013年第11期56卷 2622-2629页

作者： HUANG Xin LI LiJie ZHANG Yan beijing institute of nanoenergy and nanosystems Chinese Academy of Sciences Multidisciplinary Nanotechnology Centre College of Engineering Swansea University institute of Theoretical Physics Lanzhou University

Piezoelectric nanogenerators(NGs)have been developed for converting mechanical energy into electric energy using ZnO,GaN,ZnSnO3,and PZT *** to the unique polarity and non-central symmetry of the wurtzite structure,a composite made of using the conical shaped nanowires are used as a simple,cost-effective,and scalable *** on the finite element methods,the output voltage of the nanogenerator is modeled *** key factors:the spatial location of nanowires,length and dip angle of nanowires,thickness of NG devices,and the physical properties of the polymer inside NGs,which affect the output voltage are *** results provide guidance for optimization the output of piezoelectric nanogenerators.

关键词： piezoelectric nanogenerator model conical nanowire open circuit output voltage

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

在线全文

学校读者我要写书评

暂无评论

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

Recent Progress in Nanoscale Covalent Organic Frameworks for Cancer Diagnosis and Therapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第11期13卷 246-265页

作者： Shuncheng Yao Zhirong Liu Linlin Li beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400People’s Republic of China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

Covalent organic frameworks(COFs)as a type of porous and crystalline covalent organic polymer are built up from covalently linked and periodically arranged organic *** precise assembly,welldefined coordination network,and tunable porosity endow COFs with diverse characteristics such as low density,high crystallinity,porous structure,and large specific-surface area,as well as versatile functions and active sites that can be tuned at molecular and atomic *** unique properties make them excellent candidate materials for biomedical applications,such as drug delivery,diagnostic imaging,and disease *** realize these functions,the components,dimensions,and guest molecule loading into COFs have a great influence on their performance in various *** this review,we first introduce the influence of dimensions,building blocks,and synthetic conditions on the chemical stability,pore structure,and chemical interaction with guest molecules of ***,the applications of COFs in cancer diagnosis and therapy are ***,some challenges for COFs in cancer therapy are noted and the problems to be solved in the future are proposed.

关键词： Covalent organic frameworks Nanomedicine Drug delivery Cancer diagnosis and therapy

Recent advances of implantable systems and devices in cancer therapy and sensing

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第9期16卷 11653-11666页

作者： Zhuoheng Jiang Zhaoyang Yue Zhirong Liu 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 School of Chemistry and Chemical Engineering Center on Nanoenergy ResearchSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004China

Malignant tumors have the capability to metastasize and colonize,meaning that they can spread to other organs and tissues,distributing metastatic focus and are hard to *** significant advances have been made in cancer treatment,it remains one of the leading causes of death around the *** recent years,new-emerging implantable systems and devices have been developed to tackle the challenge of metastatic *** this review,implantable systems for suppressing tumors and preventing tumor recurrence are *** particular,we emphasize the responsive drug delivery systems and the external field assisted catalytic therapy for tumor treatment,as well as implantable biosensors for tumor microenvironment *** also conclude the open challenges and future perspectives of implantable systems and devices for cancer therapy and sensing.

关键词： implantable devices cancer therapy drug delivery biosensor nanogenerator

Piezotronic transistors in nonlinear circuit:Model and simulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2015年第8期58卷 1348-1354页

作者： HU GongWei ZHANG YuJing LUO Lu YANG Yang ZHANG Yan WANG ZhongLin institute of Theoretical Physics and Key Laboratory for Magnetism and Magnetic Materials of MOELanzhou University beijing institute of nanoenergy and nanosystems Chinese Academy of Sciences School of Material Science and Engineering Georgia Institute of Technology

For the materials that simultaneously exhibit piezoelectric and semiconductor properties,such as wurtzite Zn O,Ga N and In N,as well as two-dimensional single Mo S2,piezoelectric charges induced by externally applied strain can tune/control carrier transport at a metal-semiconductor contact or semiconductor junction,which is named piezotronic ***-semiconductor-metal piezotronic transistors are key piezotronic nanodevices for electromechanical applications,and they are typical nonlinear *** this paper,a simplified current-voltage analysis solution of piezotronic transistors is developed,which can be used for circuit design and ***,the typical nonlinear circuit:Chua's circuit based on piezotronic transistors is *** find that the output signal of the piezotronic transistor circuit can be switched and changed asymmetrically by externally applied *** study provides insight into the nonlinear properties of the piezotronic transistor,as well as guidance for piezotronic transistor nonlinear circuit application.

关键词： piezotronic transistor nonlinear nanodevice electromechanical application nonlinear circuit

Significantly enhanced energy density of nanodiamond/polyimide composites at high temperatures with ultralow nanodiamond contents

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2023年第4期66卷 956-965页

作者： WANG ChengWei CAO XiaoDan TIAN JunYuan YU Fang JIANG FengYing REN KaiLiang beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBejing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBejing 100049China Center on nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNaning 530004China

The development of miniature devices has generated a large demand for dielectric polymers with high energy storage density,especially at high ***,poly(methyl methacrylate)(PMMA)-coated nanodiamond(nd)particles were incorporated into a polyimide(PI)substrate to fabricate nd-g-PMMA/PI(NPP)*** found for the first time that with a very low content(0.4 vol.%)of nd particles,NPP-0.4 composite material gave the dielectric constant of 4.4,which is 37.5%higher than that of the PI *** maximum energy density of the NPP-0.4 composite film achieves 9.4 J cm^(-3)at room temperature,which is 54%higher than that of the PI ***,we found that the NPP-0.2 composite reaches the highest energy density and discharge efficiency of 5.77 J cm^(-3)and 72.3%at 150℃,which are 104%and 51.3%higher than those of the PI film at 150℃.This result shows a much higher energy density than most previously published results for high-temperature polymer *** phenomenon can be explained by the simulation results using COMSOL in which the interface polarization of nd/PI composites reached their maximum value with ultralow nd contents(0.4 vol.%).This research shows great promise for polymer capacitors with relatively high energy density at high temperatures.

关键词： energy storage high-temperature capacitor nanodiamond interface polarization