Size dependent gas sensing properties of spinel iron oxide nanoparticles

被引：39

作者：

Belle, Clemens J. ^{[1
,2
]}

Bonamin, Alberto ^{[1
,2
]}

Simon, Ulrich ^{[1
,2
]}

Santoyo-Salazar, Jaime ^{[3
]}

Pauly, Matthias ^{[3
]}

Begin-Colin, Sylvie ^{[3
]}

Pourroy, Genevieve ^{[3
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Inorgan Chem, D-52074 Aachen, Germany

[2] Julich Aachen Res Alliance JARA FIT, D-52074 Aachen, Germany

[3] Univ Strasbourg, CNRS, UMR7504, Inst Phys & Chim Mat Strasbourg, F-67034 Strasbourg 2, France

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2011年 / 160卷 / 01期

关键词：

Spinel iron oxide (Fe(3-x)O(4)); Nanoparticle; Hydrothermal synthesis; Resistive gas sensor (chemiresistor); Impedance spectroscopy; Particle size effect; MAGNETITE NANOPARTICLES; SENSOR; POLYPYRROLE; ARRAYS; METAL; NANOCOMPOSITES; SENSITIVITY; GAMMA-FE2O3; DESIGN; MODEL;

D O I：

10.1016/j.snb.2011.09.008

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Spinel iron oxide nanoparticles of sizes from 12 to 60 nm have been prepared via a hydrothermal synthesis. Thick films of the Fe(3-x)O(4) nanoparticles deposited on interdigital electrodes were applied as resistive gas sensors. The electrical and gas sensing properties were characterized by impedance spectroscopy using multielectrode substrates. The reducing analytes CH(4), NO, H(2) and NH(3) in N(2) as a reference were applied in order to investigate the sensor response, the selectivity and the recovery behavior at temperature between 50 degrees C and 300 degrees C. The materials exhibit good sensor responses towards NH(3) with low cross sensitivities towards H(2) and NO at 250 degrees C. A linearly increasing sensor response towards NH(3) and H(2) with decreasing particle size was found. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：942 / 950

页数：9

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