Strain sensing mechanism of the fabricated ZnO nanowire-polymer composite strain sensors

Mai, Wenjie; Liang, Zhiwen; Zhang, Long; Yu, Xiang; Liu, Pengyi; Zhu, Hanming; Cai, Xiang; Tan, Shaozao

doi:10.1016/j.cplett.2012.04.041

Cited by 25 publications

(11 citation statements)

References 16 publications

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“…Despite all of these achievements, enhancing the MnO 2 electrode conductivity still remains a challenge. Zinc oxide (ZnO) nanomaterials, owing to their special chemical and physical properties, and many technical advantages such as low cost, easy fabrication, and cleanroom compatibility, are widely studied in electronics and piezotronics devices, 31,32 strain sensors, 33,34 surface switches, 35 and photocatalysis. 36 Motivated by the idea that hydrogenation of metal oxides can greatly improve its electrochemical activity and electrical conductivity, 37 here, we designed and fabricated a novel hybrid architecture by easily coating MnO 2 on hydrogenated zinc oxide nanowires (HZnO) grown on flexible carbon cloth.…”

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confidence: 99%

Hydrogenated ZnO Core–Shell Nanocables for Flexible Supercapacitors and Self-Powered Systems

et al. 2013

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Although MnO2 is a promising material for supercapacitors (SCs) due to its excellent electrochemical performance and natural abundance, its wide application is limited by poor electrical conductivity. Inspired by our results that the electrochemical activity and electrical conductivity of ZnO nanowires were greatly improved after hydrogenation, we designed and fabricated hydrogenated single-crystal ZnO@amorphous ZnO-doped MnO2 core-shell nanocables (HZM) on carbon cloth as SC electrodes, showing excellent performance such as areal capacitance of 138.7 mF/cm(2) and specific capacitance of 1260.9 F/g. Highly flexible all-solid-state SCs were subsequently assembled with these novel HZM electrodes using polyvinyl alcohol/LiCl electrolyte. The working devices achieved very high total areal capacitance of 26 mF/cm(2) and retained 87.5% of the original capacitance even after 10 000 charge/discharge cycles. An integrated power pack incorporating series-wound SCs and dye-sensitized solar cells was demonstrated for stand-alone self-powered systems.

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confidence: 99%

Hydrogenated ZnO Core–Shell Nanocables for Flexible Supercapacitors and Self-Powered Systems

et al. 2013

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“…Nanocomposites were also used for preparing strain sensors (see Fig. 5.14) embedding ZnO nanowires in PDMS [221], PVA [222], or polyimide [223]. Another trend application is in gas [224,225] and thermal sensors [226].…”

Section: Sensors Based On Zno Hybrid Materialsmentioning

confidence: 99%

Nanostructured ZnO Materials: Synthesis, Properties and Applications

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et al. 2014

Handbook of Nanomaterials Properties

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“…The photocurrent of the ZnO/Ga2O3 heterojunction triples at 0.042% compressive strain to 261 nm deep ultraviolet light [186]. The GaN/ZnO heterostructure has an outstanding detection sensitivity of 6.82×10 13 Jones for 325 nm ultraviolet light under zero bias [187]. It is worth mentioning that the photoresponsitivity and detectivity of the photodetector based on 2D ZnO nanosheets/GaN nanorods were enhanced by two orders of magnitude compared to 1D GaN nanorods [188].…”

Section: The Piezo-phototronic Effect In Photodetectorsmentioning

confidence: 99%

Fundamentals and Applications of ZnO-Nanowire-Based Piezotronics and Piezo-Phototronics

et al. 2022

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The piezotronic effect is a coupling effect of semiconductor and piezoelectric properties. The piezoelectric potential is used to adjust the p-n junction barrier width and Schottky barrier height to control carrier transportation. At present, it has been applied in the fields of sensors, human–machine interaction, and active flexible electronic devices. The piezo-phototronic effect is a three-field coupling effect of semiconductor, photoexcitation, and piezoelectric properties. The piezoelectric potential generated by the applied strain in the piezoelectric semiconductor controls the generation, transport, separation, and recombination of carriers at the metal–semiconductor contact or p-n junction interface, thereby improving optoelectronic devices performance, such as photodetectors, solar cells, and light-emitting diodes (LED). Since then, the piezotronics and piezo-phototronic effects have attracted vast research interest due to their ability to remarkably enhance the performance of electronic and optoelectronic devices. Meanwhile, ZnO has become an ideal material for studying the piezotronic and piezo-phototronic effects due to its simple preparation process and better biocompatibility. In this review, first, the preparation methods and structural characteristics of ZnO nanowires (NWs) with different doping types were summarized. Then, the theoretical basis of the piezotronic effect and its application in the fields of sensors, biochemistry, energy harvesting, and logic operations (based on piezoelectric transistors) were reviewed. Next, the piezo-phototronic effect in the performance of photodetectors, solar cells, and LEDs was also summarized and analyzed. In addition, modulation of the piezotronic and piezo-phototronic effects was compared and summarized for different materials, structural designs, performance characteristics, and working mechanisms’ analysis. This comprehensive review provides fundamental theoretical and applied guidance for future research directions in piezotronics and piezo-phototronics for optoelectronic devices and energy harvesting.

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Strain sensing mechanism of the fabricated ZnO nanowire-polymer composite strain sensors

Cited by 25 publications

References 16 publications

Hydrogenated ZnO Core–Shell Nanocables for Flexible Supercapacitors and Self-Powered Systems

Hydrogenated ZnO Core–Shell Nanocables for Flexible Supercapacitors and Self-Powered Systems

Nanostructured ZnO Materials: Synthesis, Properties and Applications

Fundamentals and Applications of ZnO-Nanowire-Based Piezotronics and Piezo-Phototronics

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