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Journal of Nanomaterials
Volume 2016 (2016), Article ID 2359019, 17 pages
http://dx.doi.org/10.1155/2016/2359019
Review Article

Metal/Metal-Oxide Nanoclusters for Gas Sensor Applications

Department of Mathematics, Statistics and Physics, Qatar University, Doha, Qatar

Received 21 July 2016; Revised 7 October 2016; Accepted 31 October 2016

Academic Editor: Yu-Lun Chueh

Copyright © 2016 Ahmad I. Ayesh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The development of gas sensors that are based on metal/metal-oxide nanoclusters has attracted intensive research interest in the last years. Nanoclusters are suitable candidates for gas sensor applications because of their large surface-to-volume ratio that can be utilized for selective and rapid detection of various gaseous species with low-power consuming electronics. Herein, nanoclusters are used as building blocks for the construction of gas sensor where the electrical conductivity of the nanoclusters changes dramatically upon exposure to the target gas. In this review, recent progress in the fabrication of size-selected metallic nanoclusters and their utilization for gas sensor applications is presented. Special focus will be given to the enhancement of the sensing performance through the rational functionalization and utilization of different nanocluster materials.