Loading [MathJax]/extensions/MathMenu.js
A Low-Energy Room-Temperature Hydrogen Nanosensor: Utilizing the Schottky Barriers at the Electrode/Sensing-Material Interfaces | IEEE Journals & Magazine | IEEE Xplore

A Low-Energy Room-Temperature Hydrogen Nanosensor: Utilizing the Schottky Barriers at the Electrode/Sensing-Material Interfaces


Abstract:

The hydrogen-sensing performance of a nanosensor integrating interdigitated electrodes with a gap of 100 nm and indium-oxide-doped tin dioxide nanoparticles is investigat...Show More

Abstract:

The hydrogen-sensing performance of a nanosensor integrating interdigitated electrodes with a gap of 100 nm and indium-oxide-doped tin dioxide nanoparticles is investigated at room temperature. The nonlinear behavior observed from the I/V curves of the sensor in air atmosphere indicated the presence of a Schottky barrier contact at the electrode/sensing-material interface. The linear I/V response obtained in hydrogen atmosphere suggested that the Schottky barrier height could be modulated in the presence of hydrogen. At a low applied voltage of 0.4 V and 0.09-vol% hydrogen gas exposure, a very large sensitivity of 2300 and a short response time of 127 s were recorded.
Published in: IEEE Electron Device Letters ( Volume: 31, Issue: 7, July 2010)
Page(s): 770 - 772
Date of Publication: 10 June 2010

ISSN Information:


I. Introduction

With THE concerns of the safety issues of hydrogen energy, hydrogen sensors have been investigated in the decade [1]–[9]. Among the various types of hydrogen sensors, chemiresistor-based hydrogen sensors have been widely used due to the advantages of well-established fabrication and detection methods [3]–[5]. Fast response, low energy consumption, and low detection limit are the major critical factors to the hydrogen sensors. As the temperature decreases, the activation energy required for the gas–MOS reaction increases. This brings technical challenges in achieving both fast response and high sensitivity at room temperature. In this letter, we present a hydrogen nanosensor integrating gold (Au) interdigitated electrodes (IDEs) and indium oxide -doped tin dioxide nanoparticles and the influence of the Schottky barriers at the electrode/sensing-material interface on hydrogen sensing.

References

References is not available for this document.