Enhanced Performance of a ZnO Nanowire‐Based Self‐Powered Glucose Sensor by Piezotronic Effect |
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Authors: | Ruomeng Yu Caofeng Pan Jun Chen Guang Zhu Zhong Lin Wang |
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Affiliation: | 1. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332‐0245, USA;2. Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China |
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Abstract: | A self‐powered, piezotronic effect‐enhanced glucose sensor based on metal‐semiconductor‐metal (M–S–M) structured single ZnO nanowire device is demonstrated. A triboelectrical nanogenerator (TENG) is integrated to build a self‐powered glucose monitoring system (GMS) to realize the continuously monitoring of glucose concentrations. The performance of the glucose sensor is generally enhanced by the piezotronic effect when applying a –0.79% compressive strain on the device, and magnitude of the output signal is increased by more than 200%; the sensing resolution and sensitivity of sensors are improved by more than 200% and 300%, respectively. A theoretical model using energy band diagram is proposed to explain the observed results. This work demonstrates a promising approach to raise the sensitivity, improve the sensing resolution, and generally enhance the performance of glucose sensors, also providing a possible way to build up a self‐powered GMS. |
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Keywords: | piezotronic effect ZnO nanowires glucose sensors self‐powered triboelectric nanogenerators |
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