Open AccessElectro-colorimetric hydrogen gas sensor based on Pt-functionalized In2O3 nanopushpins and InGaN/GaN multiple quantum wells
Author(s) -
T. P. Chen,
Hong-Mou Shih,
Jyong-Kuen Lian,
J. H. Chen,
P. S. Lin,
Tay–Jyi Lin,
Jiawei Gong,
Y. F. Chen
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.017136
Subject(s) - materials science , optics , hydrogen , optoelectronics , quantum well , gallium nitride , wide bandgap semiconductor , laser , nanotechnology , physics , layer (electronics) , quantum mechanics
A novel electro-colorimetric gas sensing technique based on the catalytic metal nanoparticles decorated metal oxide nanostructures integrated with multiple quantum wells (MQWs) has been proposed. The working principle has been demonstrated by the sensing device derived from the composite consisting of In0.15Ga0.85N/GaN MQWs and Pt-functionalized In2O3 nanopushpins for the detection of hydrogen gas. The pronounced changes in emission as well as Raman scattering spectra of InGaN/GaN MQWs under different target gas concentrations clearly illustrate the feasibility of our newly designed composites for the derivative of contact-free, simple and highly sensitive gas sensors with optical detectio