Zhong Lin Wang

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

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Publications (522)4391.38 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: A newly-designed triboelectric nanogenerator is demonstrated which is composed of a grating-segmented freestanding triboelectric layer and two groups of interdigitated electrodes with the same periodicity. The sliding motion of the grating units across the electrode fingers can be converted into multiple alternating currents through the external load due to the contact electrification and electrostatic induction. Working in non-contact mode, the device shows excellent stability and the total conversion efficiency can reach as high as 85% at low operation frequency.
    Advanced Materials 08/2014; · 14.83 Impact Factor
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    ABSTRACT: For the maximization of the surface charge density in triboelectric nanogenerators, a new method of injecting single-polarity ions onto surfaces has been introduced for the generation of surface charges. The triboelectric nanogenerator's output power gets greatly enhanced and its maximum surface charge density is systematically studied, which shows a huge room for the improvement of triboelectric nanogenerators' output by surface modification.
    Advanced Materials 08/2014; · 14.83 Impact Factor
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    ABSTRACT: Utilizing the coupled metal oxide semiconductor field effect transistor (MOSFET) and triboelectric nanogenerator, we demonstrate an external force triggered/controlled contact-electrification field effect transistor (CE-FET), in which an electrostatic potential across the gate and source is created by a vertical contact electrification between the gate material and a "foreign" object, and the carrier transport between drain and source can be tuned/controlled by the contact-induced electrostatic potential instead of the traditional gate voltage. With the two contacted frictional layers vertically separated for 80 μm, the drain current is decreased from 13.4 μA to 1.9 μA in depletion mode and increased from 2.4 μA to 12.1 μA in enhancement mode at a drain voltage of 5 V. Compared with the piezotronic devices that are controlled by the strain induced piezoelectric polarization charged at an interface/junction, the CE-FET has greatly expanded the sensing range and choices of materials in conjunction with semiconductors. The CE-FET is likely to have important applications in sensors, human-silicon technology interfacing, MEMS, nanorobotics and active flexible electronics. Based on the basic principle of the CE-FET, a field of tribotronics is proposed for devices fabricated using the electrostatic potential created by triboelectrification as a "gate" voltage to tune/control charge carrier transport in conventional semiconductor devices. By the three-way coupling among triboelectricity, semiconductor and photoexcitation, a plenty of potentially important research fields are expected to be explored in near future.
    ACS Nano 08/2014; · 12.03 Impact Factor
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    ABSTRACT: Metal corrosion is universal in the nature and the corrosion prevention for metals plays an important role everywhere in national economic development and daily life. Here a disk triboelectric nanogenerator (TENG) with segmental structures is introduced as power source to achieve a special cathodic protection effect for steels. The output transferred charges and short-circuit current density of the TENG achieve 1.41 mC/min and 10.1 mA/m2, respectively, when the rotating speed is 1000 revolutions per minute (rpm). The cathodic protection potential, Tafel polarization curves and electrochemical impedance spectra (EIS) measurements are measured to evaluate the corrosion protection effect for the 403 stainless steel (403SS). The cathodic protection potential range from –320 mV to –5320 mV is achieved by changing rotation speeds and external resistance when the steel is coupled in a 0.5 m NaCl solution to the negative pole of the disk TENG. The corrosion tests results indicate that the TENG can produce 59.1% degree of protection for Q235 steels in 0.5 m NaCl solution. Furthermore, an application of marine corrosion prevention is presented by mounting the TENG onto a buoy. This work demonstrates a versatile, cost-effect and self-powered system to scavenging mechanical energy from environment, leading to effectively protect the metal corrosion without additional power sources.
    Advanced Functional Materials 08/2014; · 9.77 Impact Factor
  • Wei Tang, Chi Zhang, Chang Bao Han, Zhong Lin Wang
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    ABSTRACT: The triboelectric nanogenerator (TENG) is a newly invented technology that is effective for harvesting ambient mechanical energy for portable electronics, self-powered sensor networks, etc. Here, by introducing segmentation and multilayer integration into the cylindrical TENG, the generator's output is enhanced significantly. With a four-layer and thirty-segment configuration, the TENG produces a short-circuit current of 86 μA (13.5 μA m−2) and power of 4.3 mW (676 mW m−2) at a rotating speed of 600 rpm, which are respectively over 70 and 15 times higher than those of the one-layer and one-segment structure. This makes the TENG a sufficient power supply for conventional electronics, such as light bulbs and temperature sensors. Furthermore, it is demonstrated that the segmentation design is a perfect self-power management technique to automatically lower the TENG's output voltage and increase its output current without scarifying the output power. The fractal geometry is an effective way to maximize the TENG's contact surface area and thereby the output performance.
    Advanced Functional Materials 08/2014; · 9.77 Impact Factor
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    ABSTRACT: To date quite a few wearable electronics have entered the market, which are changing the life pattern of consumers. However, the limited lifetime and energy storage capacity have made rechargeable batteries the bottleneck in wearable technology especially with the increase of number of wearable devices and their large distribution. To solve this problem, we demonstrate a woven-structured triboelectric nanogenerator (W-TENG) using commodity nylon fabric, polyester fabric and conductive silver fiber fabric. With the advantage of being flexible, washable, breathable, wearable and able to be triggered by a freestanding triboelectric layer, this W-TENG can move freely without any constraint and is suitable for wearable electronics. To demonstrate the potential applications of the W-TENG, the W-TENG is integrated into shoes, coats and trousers to harvest different kinds of mechanical energy from human motion. This work presents a new approach in applying triboelectric nanogenerator to wearable devices.
    ACS Applied Materials & Interfaces 07/2014; · 5.01 Impact Factor
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    ABSTRACT: Transparent, flexible and highly efficient power sources are essential components of mobile electronics and optoelectronic devices. Here, based on the first generation of the transparent triboelectric nanogenerator (TENG), we demonstrate a simple and innovative design that can simultaneously improve the output performance and transmittance of the TENG. The improved TENG gives a maximum output up to 200 V and 7 μA at a current density of 0.78 μA cm−2. The TENG shows a high transmittance of 78%. To deeply understand the nature of the triboelectric effect, we investigated the influence of the UV–ozone treatment, surface properties, and surrounding environment on the output performance. Integrating the characterization results, we conclude that the tribocharge generation of the PDMS surface is probably due to the bond breaking of Si–O–Si groups, and is closely related to the surface properties and surrounding environment.
    J. Mater. Chem. A. 07/2014;
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    ABSTRACT: A new membrane-based triboelectric sensor (M-TES) is presented as a self-powered pressure change sensor. It generates a voltage induced by surface triboelectric charges in response to an air pressure change. Extremely high detection resolutions of 0.34 Pa and 0.16 Pa are achieved when the air pressure increases and decreases in a small region away from the ambient standard atmosphere pressure, respectively, indicating an excellent sensitivity. By integrating the M-TES with a signal processing unit, we demonstrate practical applications of the device in sensing footsteps, respirations, and heartbeat, which suggests widespread use of the M-TES in fields of security surveillance, chemical engineering, geography research, environment monitoring, and personal healthcare.
    Advanced Functional Materials 07/2014; · 9.77 Impact Factor
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    ABSTRACT: The first application of an implanted triboelectric nanogenerator (iTENG) that enables harvesting energy from in vivo mechanical movement in breathing to directly drive a pacemaker is reported. The energy harvested by iTENG from animal breathing was stored in a capacitor and successfully drove a pacemaker prototype to regulate the heart rate of a rat. This research shows a feasible approach to scavenge the biomechanical energy and presents a crucial step forward for lifetime implantable self-powered medical devices.
    Advanced Materials 07/2014; · 14.83 Impact Factor
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    ABSTRACT: We invented a triboelectric nanogenerator (TENG) that is based on a wavy-structured Cu-Kapton-Cu film sandwiched between two flat nanostructured PTFE films for harvesting energy due to mechanical vibration/impacting/compressing using the triboelectrification effect. This structure design allows the TENG to be self-restorable after impact without the use of extra springs and converts direct impact into lateral sliding, which is proved to be a much more efficient friction mode for energy harvesting. The working mechanism has been elaborated using the capacitor model and finite-element simulation. Vibrational energy from 5 to 500 Hz has been harvested, and the generator's resonance frequency was determined to be ∼100 Hz at a broad full width at half-maximum of over 100 Hz, producing an open-circuit voltage of up to 72 V, a short-circuit current of up to 32 μA, and a peak power density of 0.4 W/m(2). Most importantly, the wavy structure of the TENG can be easily packaged for harvesting the impact energy from water waves, clearly establishing the principle for ocean wave energy harvesting. Considering the advantages of TENGs, such as cost-effectiveness, light weight, and easy scalability, this approach might open the possibility for obtaining green and sustainable energy from the ocean using nanostructured materials. Lastly, different ways of agitating water were studied to trigger the packaged TENG. By analyzing the output signals and their corresponding fast Fourier transform spectra, three ways of agitation were evidently distinguished from each other, demonstrating the potential of the TENG for hydrological analysis.
    ACS Nano 06/2014; · 12.03 Impact Factor
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    ABSTRACT: The recently introduced triboelectric nanogenerator (TENG) and the traditional electromagnetic-induction generator (EMIG) are coherently integrated in one structure for energy harvesting and vibration sensing/isolation. The suspended structure is based on two oppositely oriented magnets that are enclosed by a cylindrical tube surrounded with coils, which oscillates in response to external disturbance and harvests mechanical energy simultaneously from triboelectrification and electromagnetic induction. It extends the previous definition of hybrid cell to harvest the same type of energy with multiple approaches. Both sliding-mode TENG and contact-mode TENG can be achieved in the same structure. In order to make TENG and EMIG to work together, transformers are used to match the output impedance between these two power sources with very different characteristics. The maximum output power of 7.7 mW and 1.9 mW on the same load of 5 k was obtained for TENG and EMIG, respectively, after impedance match. Benefitting from the rational design, the output signal from the TENG and the EMIG are in phase. They can be added up directly to get an output voltage of 4.6 V and an output current of 2.2 mA in parallel connection. A power management circuit was connected to the hybrid cell, and a regulated voltage of 3.3 V with constant current is achieved. For the first time, a logic operation was carried out on a half-adder circuit by using the hybrid cell worked as both the power source and the input digit signals. We also demonstrated that the hybrid cell can serve as a vibration isolator. Further applications as vibration dampers, triggers, and sensors are all promising.
    ACS Nano 06/2014; · 12.03 Impact Factor
  • Advanced Energy Materials 06/2014; · 10.04 Impact Factor
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    ABSTRACT: Tactile/touch sensing is essential in developing human-machine interfacing and electronic skins for areas such as automation, security, and medical care. Here, we report a self-powered triboelectric sensor based on flexible thin-film materials. It relies on contact electrification to generate a voltage signal in response to a physical contact without using an external power supply. Enabled by the unique sensing mechanism and surface modification by polymer-nanowires, the triboelectric sensor shows an exceptional pressure sensitivity of 44 mV/Pa (0.09% Pa(-1)) and a maximum touch sensitivity of 1.1 V/Pa (2.3% Pa(-1)) in the extremely low-pressure region (<0.15 KPa). Through integration of the sensor with a signal-processing circuit, a complete tactile sensing system is further developed. Diverse applications of the system are demonstrated, explicitly indicating a variety of immediate uses in human-electronics interface, automatic control, surveillance, remote operation, and security systems.
    Nano letters. 05/2014;
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    ABSTRACT: A power-transformed-and-managed triboelectric nanogenerator (PTM-TENG) is invented that is intended to give regulated power output for driving electronics. The design is based on a synchronized mechanical agitation that not only drives the TENG but also switches the connections for the capacitors for lowering the output voltage and increasing the output charges. An energy preservation efficiency of >95% was demonstrated. The PTM-TENG not only detected the external mechanical triggering action but also generated enough power for sending out an infrared signal.
    Nanotechnology 05/2014; 25(22):225402. · 3.84 Impact Factor
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    ABSTRACT: A new prototype triboelectric nanogenerator with superhydrophobic and self-cleaning features is invented to harvest water drop energy based on a sequential contact electrification and electrostatic induction process. Because of the easy-fabricated, cost-effective, and robust properties, the developed triboelectric nanogenerator expands the potential application to harvest energy from the household wastewater and raindrops.
    Advanced Materials 05/2014; · 14.83 Impact Factor
  • Xian Song Meng, Guang Zhu, Zhong Lin Wang
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    ABSTRACT: Collecting and converting energy from ambient air flow promise to be a viable approach in developing self-powered autonomous electronic. Here, we report an effective and robust triboelectric generator that consists of an undulating thin-film membrane and an array of segmented fine-sized electrode pairs on a single substrate. Sequential processes of contact electrification and electrostatic induction generate alternating flows of free electrons when the membrane interacts with ambient air flow. Based on an optimum rational design, the segmented electrodes plays an essential role in boosting the output current, leading to an enhancement of over 500 % compared to the structure without the segmentation. The thin-film based generator can simultaneously and continuously light up tens of commercial light-emitting diodes. Moreover, it possesses exceptional durability, providing constant electric output after millions of operation cycles. This work offers a truly practical solution that opens the avenue to take advantage of wind energy by using the triboelectric effect.
    ACS Applied Materials & Interfaces 05/2014; · 5.01 Impact Factor
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    ABSTRACT: Motion tracking is a key area of sensor systems for security, transportation, and high-tech industry. In this work, a self-powered motion tracking system is developed to monitor moving speed, direction, acceleration, starting and ending positions, and even the moving path of a moving object. Such a system is based on a set of triboelectric nanogenerators (TENGs) that are composed of two friction layers with opposite triboelectric polarities (Kapton and Aluminum) and operates in the sliding mode. Velocities of a moving object are monitored from −0.1 m s-1 to +0.1 m s-1 at a step of 0.01 m s-1, and accelerations from −0.1 m s-2 to +0.1 m s-2 at a step of 0.02 m s-2. Furthermore, an 8 × 8 two-dimensional coordinates system with 16 groups of TENGs is created, and the moving path of an object is obtained. This study opens up a new area of TENGs as active sensors with great potential in self-powered systems, positioning detecting, motion tracking, environmental and infrastructure monitoring, and security.
    Advanced Functional Materials 05/2014; · 9.77 Impact Factor
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    ABSTRACT: When water is passing through the air or an insulating tube, it will contain not only the mechanical energy but also the electrostatic energy due to the existence of triboelectric charges on its surface as a result of contact with the air/solid surface. In this paper, a hybrid triboelectric nanogenerator (TENG) is designed to simultaneously harvest the electrostatic and mechanical energies of flowing water. Water-TENG, mainly constructed by a superhydrophobic TiO2 layer with hierarchical micro/nanostructures, is used to collect the electrostatic energy of water (Output 1). Contact-TENG, composed by a polytetrafluoroethylene film and a layer of assembled SiO2 nanoparticles, is used to collect the mechanical energy of water (Output 1 and Output 2). Using TiO2 nanomaterials in water-TENG provides the advantages of photocatalytic activity and antibacterial property for water purification. Under the impact of a water stream from a household faucet at a flowing rate of 40 mL s(-1), the generated short-circuit current from Output 1 and Output 2 of dual-mode TENG can reach 43 and 18 μA, respectively. The instantaneous output power densities from Output 1 and Output 2 of dual-mode TENG are 1.31 and 0.38 W m(-2), respectively, when connecting to a load resistor of 44 MΩ. The rectified outputs have been applied to drive light-emitting diodes and charge commercial capacitors. Besides, the water-TENG has also been demonstrated as a self-powered nanosensor for ethanol detection.
    ACS Nano 05/2014; · 12.03 Impact Factor
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    ABSTRACT: We present a triboelectrification based, flexible, reusable and skin-friendly dry biopotential electrode arrays as motion sensors for tracking muscle motion and human-machine interfacing (HMI). The independently addressable, self-powered sensor arrays have been utilized to record the electric output signals as a mapping figure to accurately identify the degrees of freedom as well as directions and magnitude of muscle motions. A Fast Fourier Transform (FFT) technique was employed to analyse the frequency spectra of the obtained electric signals and thus to determine the motion angular velocities. Moreover, the motion sensor arrays produced a short-circuit current density up to 10.71 mA/m2, and an open-circuit voltage as high as 42.6 V with a remarkable signal-to-noise ratio up to 1000, which enables the devices as sensors to accurately record and transform the motions of the human joints, such as elbow, knee, heel, even fingers, and thus renders it a superior and unique invention in the field of HMI.
    ACS Applied Materials & Interfaces 04/2014; · 5.01 Impact Factor
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    ABSTRACT: Smart garments for monitoring physiological and biomechanical signals of human body are key sensors for personalized healthcare. However, they typically require bulky battery packs or have to be plugged into an electric plug in order to operate. Thus, smart shirt that can extract energy from human body motions to run body-worn healthcare sensors is particularly desirable. Here, we demonstrated a metal-free fiber-based generator (FBG) via a simple, cost-effective method by using commodity cotton threads, polytetrafluoroethylene aqueous suspension and carbon nanotubes as source materials. The FBGs can convert biomechanical motions/vibration energy into electricity utilizing electrostatic effect with an average output power density of ~ 0.1 μW/cm2, and have been identified as an effective building element for power shirt to trigger a wireless body temperature sensor system. Furthermore, the FBG was demonstrated as a self-powered active sensor to quantitatively detecting human motion.
    ACS Nano 04/2014; · 12.03 Impact Factor

Publication Stats

12k Citations
4,391.38 Total Impact Points


  • 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
    • Seoul National University
      • Department of Materials Science and Engineering
      Seoul, Seoul, South Korea
    • Northeastern University (Shenyang, China)
      Feng-t’ien, Liaoning, China
    • Northeastern University
      Boston, Massachusetts, United States
  • 2012
    • Ewha Womans University
      • Department of Physics
      Sŏul, Seoul, South Korea
    • Feng Chia University
      • Department of Materials Science and Engineering
      Taichung, Taiwan, Taiwan
    • Zhengzhou University
      Cheng, Henan Sheng, China
  • 2010–2012
    • Korea Advanced Institute of Science and Technology
      • Department of Materials Science and Engineering
      Seoul, Seoul, South Korea
    • National Institute for Materials Science
      • International Center for Materials Nanoarchitectonics (MANA)
      Tsukuba, Ibaraki-ken, Japan
    • Huazhong University of Science and Technology
      • • Wuhan National Laboratory for Optoelectronics
      • • School of Optoelectronic Science and Engineering
      Wuhan, Hubei, China
    • Tianjin University
      • School of Chemical Engineering and Technology
      Tianjin, Tianjin Shi, China
    • Myongji University
      • Department of Physics
      Sŏul, Seoul, South Korea
    • 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
    • National Nano Device Laboratories
      T’ai-pei, Taipei, Taiwan
    • Zhejiang University
      • State Key Lab of Silicon Materials
      Hangzhou, Zhejiang Sheng, China
    • University of Connecticut
      • Department of Chemical and Biomolecular Engineering
      Storrs, CT, United States
  • 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