Enhanced Performance of a ZnO Nanowire-Based Self-Powered Glucose Sensor by Piezotronic Effect

被引:178
作者
Yu, Ruomeng [1 ]
Pan, Caofeng [1 ,2 ]
Chen, Jun [1 ]
Zhu, Guang [1 ]
Wang, Zhong Lin [1 ,2 ]
机构
[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
[2] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing, Peoples R China
关键词
piezotronic effect; ZnO nanowires; glucose sensors; self-powered; triboelectric nanogenerators; BIOSENSING APPLICATIONS; DIRECT ELECTROCHEMISTRY; MODIFIED ELECTRODE; SENSITIVITY; NANOBELTS;
D O I
10.1002/adfm.201300593
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
引用
收藏
页码:5868 / 5874
页数:7
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