Ultrasensitive 2D ZnO Piezotronic Transistor Array for High Resolution Tactile Imaging

Liu, Shuhai; Wang, Long; Feng, Xiaolong; Wang, Zheng; Xu, Qi; Bai, Suo; Qin, Yong; Wang, Zhong Lin

doi:10.1002/adma.201606346

Cited by 85 publications

(93 citation statements)

References 34 publications

(42 reference statements)

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“…For capacitive and piezoresistive sensors, the requirement for external power supply can be a restriction for their applications . Meanwhile, although the piezoelectric sensors have self‐powered characteristic, the electrical output is too low to achieve a large detection range . Recently, another technology, triboelectric nanogenerator (TENG) has been verified as a promising approach to realize a sensing device with both self‐powered capability and high sensitivity .…”

Section: Introductionmentioning

confidence: 99%

Fully Elastic and Metal‐Free Tactile Sensors for Detecting both Normal and Tangential Forces Based on Triboelectric Nanogenerators

Ren

Nie

Shao

et al. 2018

Adv Funct Materials

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134

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A tactile sensor should be able to detect both normal and tangential forces, which is mandatory for simulating human hands, but this fundamental function has been overlooked by most of the previous studies. Here, based on a triboelectric nanogenerator (TENG) with single-electrode mode, the fully elastic and metal-free tactile sensor that can detect both normal and tangential forces is proposed. With tiny burr arrays on the contact interface to facilitate the elastic deformation, the detected normal pressure by the device can reach to 1.5 MPa with a sensitivity of about 51.43 kPa V −1 , and a large range of tangential forces can be detected ranging from 0.5 to 40 N with rough sensitivity of 0.83 N V −1 (0.5-3 N) and 2.50 N V −1 (3-40 N). Meanwhile, the applied tangential forces from different directions can also be clearly distinguished by the four-partitioned electrode structure. Moreover, a shield film is coated on the top surface of the device, which can screen the electrostatic interference and enhance the repeatability of the device. The demonstrated concept of this self-powered tactile sensor has excellent applicability for industrial robotics, human-machine interactions, artificial intelligence, etc.

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Section: Introductionmentioning

confidence: 99%

Fully Elastic and Metal‐Free Tactile Sensors for Detecting both Normal and Tangential Forces Based on Triboelectric Nanogenerators

Ren

Nie

Shao

et al. 2018

Adv Funct Materials

Self Cite

134

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“…Therefore, a new device structure should be designed to acquire a high‐resolution tactile sensor. For a high‐density functional nanodevice, it is an effective solution to omit the interconnect layout of the gate electrode, in other words, the TSATM changes from a three‐terminal to a two‐terminal device . Wang's group has sustainably developed a series of piezoelectric sensors based on piezotronic and piezo‐phototronic effects by using piezoelectric semiconductor materials, including ZnO, GaN, and CdSe .…”

Section: Tactile Sensor Arrays Based On the Transistor Matrixmentioning

confidence: 99%

Recent Advances in Large‐Scale Tactile Sensor Arrays Based on a Transistor Matrix

Huo

Peng

Zhang

et al. 2018

Adv Materials Inter

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sensors has become a cross-disciplinary field that integrates a wide range of expertise in electronics, physics, materials science, chemistry, and biology. [2] At the same time, significant breakthroughs in flexible electronics, nanotechnology, and manufacturing have enabled the construction of tactile sensors with superior performance based on different transduction methods, including piezoresistivity, [3] capacitance, [4] and piezoelectricity. [5] More specifically, large-scale skin-like tactile sensors that detect pressure, temperature, or other stimuli in the surroundings have attracted increasing attention for applications in human-machine interfaces, [6] intelligent robots, [7] artificial limbs, [8] and other intelligent systems. [9] However, certain challenges remain in large-scale tactile simulation with fast data transmission and low signal crosstalk among the pixels.The tactile sensor arrays based on a transistor matrix (TSATM) have thus been developed for large-scale 2D tactile profiles. [10] The field effect transistor (FET) is one of the most important components in every electronic device, and it has three lead-out electrodes, the source, drain, and gate electrodes. It can control the flow of electrons through a planar channel when the applied gate voltage exceeds a certain threshold. In this way, small changes in the input voltage can excite the transition between high and low output currents. Thus, the FET operates as a control device and amplifier in a logic circuit. [11] A transistor active matrix is necessary to be employed in a largescale tactile sensor, where the addressing mode is similar to the memory structure, with word lines and bit lines. Large-scale tactile mapping can be easily achieved by monitoring the drain/ source current of each pixel. At the same time, the one-way current-passing characteristics of the transistor make it possible to reduce the crosstalk among the pixels. Recently, various types of TSATMs with outstanding performance based on an integrated composite structure or intrinsic pressure sensitive transistor were consecutively demonstrated for a variety of actual applications, as shown in Figure 1.This review focuses on the introduction of advanced TSATMs. The main content includes the following aspects: i) various types of TSATMs with an integrated composite structure that consists of a transistor matrix and a pressuredependent electronic component, and the development of the Tactile sensors that possess the physical properties of human epidermis, which can sense external stimuli (pressure, temperature, humidity, etc.), are a very popular cutting-edge innovation. They make a large contribution to extensive applications in the real-time monitoring of human health, artificial intelligence, robot systems, and biocompatibility. However, great challenges remain in large-scale tactile simulation to attain fast data transmission and low signal crosstalk among the pixels. The tactile sensor arrays based on a transistor matrix (TSATMs) are thus investigated for large-sc...

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“…9 is important for highly efficient energy devices [91][92][93][94][95][96]. Patterned ZnO NAs with adjustable height and controllable period effectively promote light scattering and provide charge transport channels, which have broad application prospects in the field of energy devices [97].…”

Section: (9(: Science China Materialsmentioning

confidence: 99%

Design and tailoring of patterned ZnO nanostructures for energy conversion applications

Kang

Liao

et al. 2017

Sci. China Mater.

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ZnO is a typical direct wide-bandgap semiconductor material, which has various morphologies and unique physical and chemical properties, and is widely used in the fields of energy, information technology, biomedicine, and others. The precise design and controllable fabrication of nanostructures have gradually become important avenues to further enhancing the performance of ZnO-based functional nanodevices. This paper introduces the continuous development of patterning technologies, provides a comprehensive review of the optical lithography and laser interference lithography techniques for the controllable fabrication of ZnO nanostructures, and elaborates on the potential applications of such patterned ZnO nanostructures in solar energy, water splitting, light emission devices, and nanogenerators. Patterned ZnO nanostructures with highly controllable morphology and structure possess discrete three-dimensional space structure, enlarged surface area, and improved light capture ability, which realize the efficient carrier regulation, achieve highly efficient energy conversion, and meet the diverse requirements of functional nanodevices. The patterning techniques proposed for the precise design of ZnO nanostructures not only have important guiding significance for the controllable fabrication of complex nanostructures of other materials, but also open up a new route for the further development of functional nanostructures.

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Ultrasensitive 2D ZnO Piezotronic Transistor Array for High Resolution Tactile Imaging

Cited by 85 publications

References 34 publications

Fully Elastic and Metal‐Free Tactile Sensors for Detecting both Normal and Tangential Forces Based on Triboelectric Nanogenerators

Fully Elastic and Metal‐Free Tactile Sensors for Detecting both Normal and Tangential Forces Based on Triboelectric Nanogenerators

Recent Advances in Large‐Scale Tactile Sensor Arrays Based on a Transistor Matrix

Design and tailoring of patterned ZnO nanostructures for energy conversion applications

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