Light Emission Properties of SnO2 Nanowires for Applications in Gas Sensing

被引：3
|
作者：
Lettieri, S. [1 ,2 ]
Setaro, A. [2 ]
Bismuto, A. [2 ]
Maddalena, P. [2 ]
Baratto, C. [3 ]
Comini, E. [3 ]
Todros, S. [3 ]
Sberveglieri, G. [3 ]
机构：
[1] Univ Naples Federico II, CNR, INFM Coherentia, I-80126 Naples, Italy
[2] Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy
[3] Univ Brescia, INFM, CNR, SENSOR, I-25133 Brescia, Italy
来源：
SENSOR LETTERS | 2008年 / 6卷 / 04期
关键词：
Tin Oxide; Luminescence; Nanowires; Optical Sensors;
D O I：
10.1166/sl.2008.438
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Chemical sensing of gas molecules adsorbed on the tin dioxide nanowires by modulation of their photoluminescence efficiency is investigated. It is shown that adsorption of nitrogen dioxide at the ppm and sub-ppm level leads to quenching of the photoluminescence emission and that larger sensitivities are obtained at room temperature and at low (order of few ppm) nitrogen dioxide concentrations. The luminescence efficiency is found to decrease upon heating of the sample without appreciable variations of the emission spectrum. Experiments performed during heating and cooling of samples in controlled environment stress the role played by oxidation in the luminescence properties.
引用
收藏
页码：596 / 600
页数：5
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