Paper Title:
Hydrogen Detection with Noble Metal-TiO2 Schottky Diodes
  Abstract

Fast detection of hydrogen at a wide concentration range is desired for many applications. We report detecting hydrogen using Au-TiO2-Ti and Ag-TiO2-Ti diodes. While hydrogen-Au and hydrogen-Ag interactions are very different, at a constant biasing voltage, the measured current in both diodes is highly sensitive to the partial pressure of hydrogen contamination in the surrounding atmosphere. Work function variations were investigated by connecting the I-V specifications to the energy barrier height established at the Au-TiO2 and Ag-TiO2 junctions. Electronic features of the devices were described based on the assumption of two different hydrogen-noble metal interactions: Hydrogen reduces Ag work function by reducing the adsorbed oxygen species from the silver surface, while Au work function is reduced by the same mechanism as well as the direct adsorption of hydrogen species to the gold surface. Both of these mechanisms result in hydrogen detection by Schottky barrier height reduction and current increase.

  Info
Periodical
Edited by
E. Hristoforou and D.S. Vlachos
Pages
289-293
DOI
10.4028/www.scientific.net/KEM.495.289
Citation
S. Rahbarpour, F. Hossein-Babaei, "Hydrogen Detection with Noble Metal-TiO2 Schottky Diodes", Key Engineering Materials, Vol. 495, pp. 289-293, 2012
Online since
November 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Il Ho Kim, Won Sik Lee, Se Hyun Ko, Jin Man Jang, Ho Sung Kim
Abstract:The open cell Al (or Al foam) was employed in the alloy hydride system due to the rapid heat conductivity of Al. The hydrogen storage alloy...
881
Authors: J.S. Arellano
Abstract:In this theoretical study, the H2 adsorption is considered in a novel system formed by a (6,6) carbon nanotube fragment and a planar graphene...
201
Authors: Bartosz Gołębiowski, Tadeusz Zakroczymski, Wiesław Świątnicki
Abstract:The effect of the nitrided layers produced on ferritic-austenitic stainless steel to hydrogen absorption and desorption was studied. The...
71
Authors: Wen Wu Zhong, Fa Min Liu, Qin Yi Shi, Wei Ping Chen
Chapter 1: Advanced Materials Science
Abstract:Al and Sb codoped ZnO thin films were prepared through a sol-gel spin coating method on glass substrates and annealed in different...
42
Authors: Roman Yatskiv, Karel Zdansky, Jan Grym
Abstract:We investigated Schottky diode hydrogen sensors prepared by printing colloidal graphite on ZnO, GaN, and InP substrates partly covered with...
159