Nanocomposite NiO:Au hydrogen sensors with high sensitivity and low operating temperature

被引：18

作者：

Kandyla, M. ^{[1
]}

Chatzimanolis-Moustakas, C. ^{[1
,2
]}

Koumoulos, E. P. ^{[2
]}

Charitidis, C. ^{[2
]}

Kompitsas, M. ^{[1
]}

机构：

[1] Natl Hellen Res Fdn, Inst Theoret & Phys Chem, GR-11635 Athens, Greece

[2] Natl Tech Univ Athens, Sch Chem Engn, Zografos 15780, Greece

来源：

MATERIALS RESEARCH BULLETIN | 2014年 / 49卷

关键词：

Composites; Oxides; Sputtering; Laser deposition; Electrochemical properties; H-2 SENSING PROPERTIES; THIN-FILM; ENHANCEMENT; GROWTH;

D O I：

10.1016/j.materresbull.2013.09.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present results on the development of nanocomposite NiO:Au thin-film hydrogen sensors, which are able to detect hydrogen concentrations as low as 2 ppm in air, operating at low temperatures in the range 125-150 degrees C. Thin NiO films were sputter-deposited on oxidized silicon substrates. The structural, morphological, and nanomechanical properties of the films were investigated with respect to post-deposition annealing. Au nanoparticles were added on the NiO surface via pulsed laser deposition and the films were tested as hydrogen sensors before and after Au deposition. The performance of the NiO films as hydrogen sensors improved significantly in the presence of Au nanoparticles on the surface. The detection limit (lowest detectable hydrogen concentration) decreased by two orders of magnitude, while the response time also decreased by a factor of three. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：552 / 559

页数：8

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