Percolating SnO2 nanowire network as a stable gas sensor: Direct comparison of long-term performance versus SnO2 nanoparticle films

被引：133

作者：

Sysoev, V. V. ^{[1
]}

Schneider, T. ^{[2
]}

Goschnick, J. ^{[2
]}

Kiselev, I. ^{[2
]}

Habicht, W. ^{[2
]}

Hahn, H. ^{[2
]}

Strelcov, E. ^{[3
]}

Kolmakov, A. ^{[3
]}

机构：

[1] Saratov State Tech Univ, Saratov 410054, Russia

[2] Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany

[3] So Illinois Univ, Carbondale, IL 62901 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2009年 / 139卷 / 02期

关键词：

Gas sensor; Tin dioxide; Nanowire; Nanoparticle; Stability; METAL-OXIDE NANOWIRE; TIN OXIDE; ELECTRONIC NOSE; THIN-FILMS; GRAIN-SIZE; SENSITIVITY; OXYGEN; CO;

D O I：

10.1016/j.snb.2009.03.065

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A comparative Study of the long-term gas-sensing performance of chemiresistors made of: (i) mats of randomly oriented single crystal SnO2 nanowires and (ii) thin layers of pristine SnO2 nanoparticles, has been carried Out. The sensing elements made of percolating nanowires demonstrate excellent sensitivity and long-term stability toward traces of 2-propanol in air. Different from the nanowire network, the superior initial sensitivity of the nanoparticle layer deteriorates during the first month of the operation and approaches to one observed steadily in the nanowire mats. The better stability of the nanowire mats sensors is explained in framework of reduced propensity of the single crystal nanowires to sinter under real world operation conditions with respect to nanoparticle thin film. At the microscopic level, the letter defines the stability of the percolating paths, analyte delivery and transduction mechanism in nanowire network sensing elements. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：699 / 703

页数：5

共 43 条

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