Zhong Lin Wang

Beijing University of Aeronautics and Astronautics (Beihang University), Peping, Beijing, China

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Publications (561)4932.26 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Using polarization charges created at the metal-cadmium sulfide interface under strain to gate/modulate electrical transport and optoelectronic processes of charge carriers, the piezo-phototronic effect is applied to process mechanical and optical stimuli into electronic controlling signals. The cascade nanowire networks are demonstrated for achieving logic gates, binary computations, and gated D latches to store information carried by these stimuli. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    Advanced Materials 12/2014; · 14.83 Impact Factor
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    ABSTRACT: Based on a triboelectric nanogenerator (TENG) the first active micro-actuator for optical modulation driven by mechanical energy without external power or mechanical joint is presented. This demonstrates the enormous potential of TENGs for independent and sustainable self-powered micro/nano electromechanical systems, and opens up new -applications of TENGs in triboelectric-voltage-controlled devices. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    Advanced Materials 11/2014; · 14.83 Impact Factor
  • Ken Pradel, Wenzhuo Wu, Yong Ding, Zhong Lin Wang
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    ABSTRACT: Emerging applications in wearable technology, pervasive computing, human-machine interfacing and implantable biomedical devices demand an appropriate power source that can sustainably operate for extended periods of time with minimal intervention1. Self-powered nanosystems, which harvest operating energy from its host (i.e. the human body), may be feasible due to their extremely low power consumption2-4. Here we report materials and designs for wearable-on-skin piezoelectric devices based on ultrathin (2 μm) solution-derived ZnO p-n homojunction films for the first time. The depletion region formed at the p-n homojunction effectively reduces internal screening of strain-induced polarization charges by free carriers in both n-ZnO and Sb-doped p-ZnO, resulting in significantly enhanced piezoelectric output compared to a single layer device. The p-n structure can be further grown on polymeric substrates conformable to a human wrist and used to convert movement of the flexor tendons into distinguishable electrical signals for gesture recognition. The ZnO homojunction piezoelectric devices may have applications in powering nanodevices, bio-probes and self-powered human-machine interfacing.
    Nano letters. 11/2014;
  • Simiao Niu, Zhong Lin Wang
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    ABSTRACT: The TENG theoretical system was thoroughly reviewed in this manuscript.•The fundamental working principle of TENGs was uncovered.•The unique TENG resistive and capacitive load characteristics was in-depth discussed.•The material and structural optimization strategy for every TENG fundamental working modes is obtained.
    Nano Energy 11/2014; · 10.21 Impact Factor
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    ABSTRACT: Fundamentals of piezotronics.•Variations of single piezotronic transistors.•Novel applications of piezotronic devices beyond strain sensors.•Coupling of the piezotronic effect with other interfacial effects.•Integration of piezotronic devices towards functional systems.
    Nano Energy 11/2014; · 10.21 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We introduce a single-electrode-based rotationary triboelectric nanogenerator (SR-TENG) formed by two wheels and a belt for harvesting mechanical energy. The fundamental working principle is studied by conjunction of experimental results with finite element calculation. The continuous discharging (CD) mode and the instantaneous discharging (ID) mode have been demonstrated for the SR-TENG. The systematical experiments indicate that the short-circuit current increases with the rotating speed for SR-TENG with CD mode, but the open-circuit voltage maintains constant. The short-circuit current and open-circuit voltage decrease nearly linearly with the friction contact area, which provides an application as a self-powered surface area sensor of transmission wheel and gear. For SR-TENG with ID mode, the electric outputs are greatly enhances. The current peak is about 20 μA at variation rotating speeds even if the external load is 10 MΩ, which is 33 times higher than that of the SR-TENG with CD mode without external load. The SR-TENG with ID mode has also been demonstrated as a self-powered misalignment sensor.
    Nano Energy 11/2014; · 10.21 Impact Factor
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    ABSTRACT: Herein, we report a facile and robust route to nanoscale tunable triboelectric energy harvesters realized by the formation of highly functional and controllable nanostructures via block copolymer (BCP) self-assembly. Our strategy is based on the incorporation of various silica nanostructures derived from the self-assembly of BCPs to enhance the characteristics of TENGs by modulating the contact-surface area and the frictional force. Our simulation data also confirm that the nanoarchitectured morphologies are effective for triboelectric generation.
    Nano letters. 11/2014;
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    ABSTRACT: A vibration sensor is usually designed to measure the vibration frequency but disregard the vibration amplitude, which is rather challenging to be quantified due to the requirement of linear response. Here, we show the application of triboelectric nanogenerator (TENG) as a self-powered tool for quantitative measurement of vibration amplitude based on an operation mode, the contact-mode freestanding triboelectric nanogenerator (CF-TENG). In this mode, the triboelectrically charged resonator can be agitated to vibrate between two stacked stationary electrodes. Under the working principle with a constant capacitance between two electrodes, the amplitudes of the electric signals are proportional to the vibration amplitude of the resonator (provided that the resonator plate is charged to saturation), which has been illuminated both theoretically and experimentally. Together with its capability in monitoring the vibration frequency, the CF-TENG appears as the triboelectrification-based active sensor that can give full quantitative information about a vibration. In addition, the CF-TENG is also demonstrated as a power source for electronic devices.
    ACS Nano 11/2014; · 12.03 Impact Factor
  • Yingchun Wu, Xue Wang, Ya Yang, Zhong Lin Wang
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    ABSTRACT: Integration of the single-electrode based triboelectric nanogenerator (S-TENG) and the electromagnetic generator (EMG) to harvest the mechanical energy produced by the movement of a mass in an acrylic tube.•Performance enhancement by integration of the two generators.•Investigation of the charging performance of the hybrid energy cell that is much better than that of S-TENG or EMG.
    Nano Energy 11/2014; · 10.21 Impact Factor
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    ABSTRACT: A triboelectric generator (TEG) for -scavenging flow-driven mechanical -energy to directly power a wireless sensor node is demonstrated for the first time. The output performances of TEGs with the different dimensions are systematically investigated, indicating that a largest output power of about 3.7 mW for one TEG can be achieved under an external load of 3 MΩ.
    Advanced Materials 11/2014; · 14.83 Impact Factor
  • Sihong Wang, Long Lin, Zhong Lin Wang
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    ABSTRACT: This review paper summarized the fundamental of triboelectric nanogenerators for generating electrical signals from mechanical agitations, which is the basis of serving as self-powered active sensors.•This review paper summarized the updated research progress of triboelectric-nanogenerator-based self-powered active sensors for different types of mechanical motions, including pressure change, touch, vibration, linear displacement, rotation, tracking of moving objects, as well as some examples of practical applications.•This review paper summarized the updated research progress of triboelectric-nanogenerator-based self-powered active sensors for chemical detection and environmental monitoring.•This review paper gave an insightful perspective for the future research on the triboelectric-nanogenerator-based self-powered active sensors.
    Nano Energy 11/2014; · 10.21 Impact Factor
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    ABSTRACT: The open-circuit voltage of a triboelectric nanogenerator (TENG) increases with the tribo-charge density and the separated distance between two tribo-surfaces, which can reach several thousand volts and is much higher than the working voltage required by most electrical devices and energy storage units. Therefore, improving the effective efficiency of TENGs requires reducing the output voltage and enhancing the transferred charges. Here, a multilayered-electrode-based TENG (ME-TENG) is developed in which the output voltage can be managed by controlling the charge flow in a process of multiple (N) steps, which results in N times lower voltage but N times higher total charge transport. The ME-TENG is demonstrated to work in various modes, including multichannel, single-channel, and double-tribo-surface structures. The effects of insulator layer thickness and total layer number on the output voltage are simulated by the finite element method. The output voltage can be modulated from 14 to 102 V by changing the insulator layer number between two adjacent working electrodes, based on which the 8-bit logic representations of the characters in the ACSII code table are demonstrated. The ME-TENG provides a novel method to manage the output power and has potential applications in self-powered sensors array and human–machine interfacing with logic communications.
    Advanced Energy Materials 11/2014; · 14.39 Impact Factor
  • Zhe Wang, Li Cheng, Youbin Zheng, Yong Qin, Zhong Lin Wang
    Nano Energy 11/2014; · 10.21 Impact Factor
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    ABSTRACT: By utilizing the water-flow-driven triboelectric nanogenerator, a fully self-powered water splitting process is demonstrated using the electricity converted from a water flow without additional energy costs. Considering the extremely low costs, the demonstrated approach is universally applicable and practically usable for future water electrolysis, which may initiate a research direction in the field of triboelectrolysis and possibly impacts energy science in general. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    Advanced Materials 11/2014; · 14.83 Impact Factor
  • Wei Liu, Aihua Zhang, Yan Zhang, Zhong Lin Wang
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    ABSTRACT: Using the first principle calculations, the widths of piezoelectric charge distributions in an Ag-ZnO-Ag transistor are obtained, which are key parameters for understanding the piezotronic effect.•The modulations of Schottky barriers at two transistor interfaces show asymmetric behavior due to piezotronic effect, which agrees with previous experiment results.
    Nano Energy. 10/2014;
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    ABSTRACT: For the first time to utilize renewable solar and wind energy in photocatalysis for organic contaminants removal and hydrogen fuel production.•The wind driven triboelectric nanogenerator assisted photocatalysis with surprisingly high efficient.•A 3-D stereo photoelectrocatalysis system was designed: TiO2 nanowires/graphite microfiber arrays.
    Nano Energy. 10/2014;
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    ABSTRACT: Highly-stretchable piezoelectric hemispheres composed composite thin film nanogenerators are fabricated as a self-powered, exceptionally sensitive sensor for providing sensitive motion information from a human body. The composite films are based on the highly-ordered piezoelectric hemispheres embedded in a soft matrix, polydimethylsiloxane (PDMS) and generate large power output up to 6 V and 0.2 μA/cm2 under normal bending force. The electrical outputs increase by stacking such hemispheres layer-by-layer. The strain sensitivity of the films differs according to the bending direction, and the high sensitivity is achieved by convex bending for hemisphere composite due to the strong electric dipole alignment. The films are attached on the surface of a wrist and its output voltage/current density provides the information on the wrist motion.
    Nano Energy. 10/2014;
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    ABSTRACT: In this work, different interior structures of ZnCo2O4 microspheres have been fabricated by a hydrothermal method followed by thermal decomposition via a calcination process at various furnace ramp rates. When evaluated as anode materials in lithium-ion half cells, the core-shell microspheres showed high electrochemical performance with a first discharge specific capacity of 1280 mAh/g at 200 mA/g and demonstrated excellent cycling stability with only 3.9% capacity loss between the second and fiftieth cycles at 400 mA/g.
    Nano Energy. 10/2014;
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    ABSTRACT: An AC magnetic field, which is a carrier of information, is distributed everywhere and is continuous. How to use and detect this field has been an ongoing topic over the past few decades. Conventional magnetic sensors are usually based on the Hall Effect, the fluxgate, a superconductor quantum interface or magnetoelectric or magnetoresistive sensing. Here, a flexible, simple, low-cost and self-powered active piezoelectric nanogenerator (NG) is successfully demonstrated as an AC magnetic field sensor at room temperature. The amplitude and frequency of a magnetic field can both be accurately sensed by the NG. The output voltage of the NG has a good linearity with a measured magnetic field. The detected minute magnetic field is as low as 1.2 × 10(-7) tesla, which is 400 times greater than a commercial magnetic sensor that uses the Hall Effect. In comparison to the existing technologies, an NG is a room-temperature self-powered active sensor that is very simple and very cheap for practical applications.
    Nanotechnology 10/2014; 25(45):455503. · 3.84 Impact Factor
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    ABSTRACT: The piezoelectric characteristics of nanowires, thin films and bulk crystals have been closely studied for potential applications in sensors, transducers, energy conversion and electronics. With their high crystallinity and ability to withstand enormous strain, two-dimensional materials are of great interest as high-performance piezoelectric materials. Monolayer MoS2 is predicted to be strongly piezoelectric, an effect that disappears in the bulk owing to the opposite orientations of adjacent atomic layers. Here we report the first experimental study of the piezoelectric properties of two-dimensional MoS2 and show that cyclic stretching and releasing of thin MoS2 flakes with an odd number of atomic layers produces oscillating piezoelectric voltage and current outputs, whereas no output is observed for flakes with an even number of layers. A single monolayer flake strained by 0.53% generates a peak output of 15 mV and 20 pA, corresponding to a power density of 2 mW m(-2) and a 5.08% mechanical-to-electrical energy conversion efficiency. In agreement with theoretical predictions, the output increases with decreasing thickness and reverses sign when the strain direction is rotated by 90°. Transport measurements show a strong piezotronic effect in single-layer MoS2, but not in bilayer and bulk MoS2. The coupling between piezoelectricity and semiconducting properties in two-dimensional nanomaterials may enable the development of applications in powering nanodevices, adaptive bioprobes and tunable/stretchable electronics/optoelectronics.
    Nature 10/2014; · 38.60 Impact Factor

Publication Stats

13k Citations
4,932.26 Total Impact Points

Institutions

  • 2014
    • Beijing University of Aeronautics and Astronautics (Beihang University)
      • School of Biological and Medical Engineering
      Peping, Beijing, China
  • 2002–2014
    • Chinese Academy of Sciences
      • Beijing Laboratory of Electron Microscopy
      Peping, Beijing, China
    • University of California, Berkeley
      • Department of Chemistry
      Berkeley, CA, United States
    • University of Science and Technology, Beijing
      • School of Materials Science and Engineering
      Peping, Beijing, China
    • University of Washington Seattle
      • Department of Materials Science and Engineering
      Seattle, WA, United States
    • Tsinghua University
      • School of Materials Science and Engineering
      Beijing, Beijing Shi, China
    • University of Akron
      Akron, Ohio, United States
    • Nanjing University
      • Department of Physics
      Nanjing, Jiangsu Sheng, China
    • Harvard University
      • Department of Chemistry and Chemical Biology
      Cambridge, MA, United States
    • Sandia National Laboratories
      • Electronic and Nanostructured Materials Department
      Albuquerque, New Mexico, United States
  • 1997–2014
    • Georgia Institute of Technology
      • • School of Materials Science and Engineering
      • • School of Electrical & Computer Engineering
      Atlanta, Georgia, United States
  • 2013
    • University of Electronic Science and Technology of China
      • State Key Laboratory of Electronic Thin Films and Integrated Devices
      Hua-yang, Sichuan, China
    • Yonsei University
      • Department of Materials Science and Engineering
      Seoul, Seoul, South Korea
    • Northeastern University (Shenyang, China)
      Feng-t’ien, Liaoning, China
    • Seoul National University
      • Department of Materials Science and Engineering
      Seoul, Seoul, South Korea
    • Northeastern University
      Boston, Massachusetts, United States
  • 2012
    • Ewha Womans University
      • Department of Physics
      Sŏul, Seoul, South Korea
    • Zhengzhou University
      Cheng, Henan Sheng, China
    • Feng Chia University
      • Department of Materials Science and Engineering
      Taichung, Taiwan, Taiwan
  • 2010–2012
    • Huazhong University of Science and Technology
      • • Wuhan National Laboratory for Optoelectronics
      • • School of Optoelectronic Science and Engineering
      Wuhan, Hubei, China
    • National Institute for Materials Science
      • International Center for Materials Nanoarchitectonics (MANA)
      Tsukuba, Ibaraki-ken, Japan
    • Korea Advanced Institute of Science and Technology
      • Department of Materials Science and Engineering
      Seoul, Seoul, South Korea
    • Myongji University
      • Department of Physics
      Sŏul, Seoul, South Korea
    • Tianjin University
      • School of Chemical Engineering and Technology
      Tianjin, Tianjin Shi, China
    • Brown University
      • Department of Chemistry
      Providence, RI, United States
  • 2007–2012
    • Xiamen University
      • Department of Chemistry
      Amoy, Fujian, China
    • Sun Yat-Sen University
      • School of Physics and Engineering (SPE)
      Zhongshan, Guangdong Sheng, China
  • 2011
    • University of Rome Tor Vergata
      • Dipartimento di Ingegneria Civile e Ingegneria Informatica (DICII)
      Roma, Latium, Italy
    • National Taiwan University
      • Department of Electrical Engineering
      Taipei, Taipei, Taiwan
    • Northeast Institute of Geography and Agroecology
      • Institute of Physics
      Beijing, Beijing Shi, China
  • 2006–2011
    • National Tsing Hua University
      • Department of Materials Science and Engineering
      Hsin-chu-hsien, Taiwan, Taiwan
    • Zhongshan University
      Shengcheng, Guangdong, China
    • Southwest University of Science and Technology
      Mien-yang-hsien, Sichuan, China
    • Hunan University
      Ch’ang-sha-shih, Hunan, China
  • 2002–2011
    • Peking University
      • • College of Engineering
      • • Laboratory for the Physics & Chemistry of Nanodevices
      Beijing, Beijing Shi, China
  • 2009
    • University of Wisconsin, Madison
      • Department of Materials Science and Engineering
      Madison, MS, United States
    • National Nano Device Laboratories
      T’ai-pei, Taipei, Taiwan
    • University of Connecticut
      • Department of Chemical and Biomolecular Engineering
      Storrs, CT, United States
    • Zhejiang University
      • State Key Lab of Silicon Materials
      Hangzhou, Zhejiang Sheng, China
  • 2008–2009
    • Beijing University of Chemical Technology
      • College of Materials Science and Engineering (SMSE)
      Peping, Beijing, China
    • Harbin Institute of Technology
      • School of Materials Science and Engineering
      Harbin, Heilongjiang Sheng, China
    • University of Dayton
      • Department of Chemical and Materials Engineering
      Dayton, OH, United States
  • 2005–2009
    • Shandong University
      • State Key Laboratory for Crystal Materials
      Jinan, Shandong Sheng, China
    • University of New Orleans
      New Orleans, Louisiana, United States
  • 2005–2007
    • Chongqing University
      • Department of Applied Physics
      Chongqing, Chongqing Shi, China
  • 2004–2007
    • University of Texas at Arlington
      • Department of Physics
      Arlington, TX, United States
    • Shanghai Jiao Tong University
      • School of Materials Science and Engineering
      Shanghai, Shanghai Shi, China
  • 2000
    • Clemson University
      Clemson, South Carolina, United States