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

Abstract

A self-powered, piezotronic effect-enhanced glucose sensor based on metalsemiconductor-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.

Synthesis of ZnO and transition metals doped ZnO nanostructures, their characterization and sensing applications

“…ZnO NRs/NWs are extensively applied in various sensing applications fields, e.g. biosensors [44][45][46][47][48][49][50][51], biomarker [52][53], drug delivery [54][55] , chemical sensors [56][57][58], gas sensors [59][60], pH sensors [61], humidity sensor [62][63][64], UV sensors [65][66][67][68][69], temperature sensors [70][71], and pressure/force/mass/load sensors [72][73][74][75]. Also, the high performances of several types of sensors have been enhanced by utilizing different metals doped ZnO nanorods, e.g.…”

Reusable Glucose Sensor Based on Enzyme Immobilized Egg-shell Membrane

“…In fact glucose sensors currently account for 85% of the commercial biosensor market. 3 Researchers have introduced different types of optical, 6,7 electrochemical, 8,9 piezoelectric 10,11 and non-enzymatic 12,13 glucose sensors. Some of them have been successfully implemented and are commercially available in the market.…”

Role of Contact and Contact Modification on Photo-response in a Charge Transfer Complex Single Nanowire Device

“…The role of contact becomes especially important in the context of photoresponse in nanowires. In opto-electronic devices based on nanowires like solar cell [3], nanowire sensors [4], photodetector [5] etc. The crucial parameter is often the photoconductive gain G, defined as G ≡ I ph /qF, where I ph is the photocurrent generated due to absorbed photon flux F , q being the charge.…”

“…Novel nanoscale optoelectronic devices are important applications of nanomaterials, particularly nanowires which can be scaled down to a single nanowire (NW) device [1][2][3][4][5][6][7][8][9][10][11][12]. Contact electrodes play an important role in improving performance of nanoscale devices [1][2].…”

“…Nanotubes, nanowires and nanobelts are important one-dimensional (1D) nanomaterials that are the foundation for nanoscience and nanotechnology [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Novel nanoscale optoelectronic devices are important applications of nanomaterials, particularly nanowires which can be scaled down to a single nanowire (NW) device [1][2][3][4][5][6][7][8][9][10][11][12].…”