Metal oxide nanowires for optical gas sensing

机译：用于光学气体传感的金属氧化物纳米线

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SnO_2 and ZnO and metal oxide nanowires were synthesized by vapor transport process in a horizontal tube furnace. The peculiar characteristic of these materials is the emission of visible photoluminescence (PL) when they are excited with UV light. The visible photoluminescence of tin and zinc oxide nanowires is quenched by nitrogen dioxide at ppm level in a fast (time scale order of seconds) and reversible way. Besides, the response seems highly selective toward humidity and other polluting species, such as CO and NH3. We believe that adsorbed gaseous species that create surface states can quench PL by creating competitive nonradiative paths.

机译：SnO_2，ZnO和金属氧化物纳米线是通过在卧式管式炉中的气相传输过程合成的。这些材料的独特特性是当它们被紫外线激发时会发出可见光致发光（PL）。氧化锡和氧化锌纳米线的可见光致发光，以二氧化氮以ppm级快速（可逆的时间刻度）进行淬灭。此外，该响应似乎对湿度和其他污染物种（例如CO和NH3）具有高度选择性。我们相信，产生表面态的吸附气态物质可以通过产生竞争性非辐射路径来淬灭PL。

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来源
《Zinc Oxide Materials and Devices II; Proceedings of SPIE-The International Society for Optical Engineering; vol.6474》|2007年|64741E.1-64741E.9|共9页
会议地点 San JoseCA(US)
作者
C. Baratto; S. Bianchi; E. Comini; G. Faglia; M. Ferroni; G. Sberveglieri;
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作者单位

C.N.R. - INFM Dept of Chemistry and Physics, Univ. of Brescia, Via Valotti 9, 25133 Brescia,Italy;

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原文格式 PDF
正文语种 eng
中图分类 TN304.21;
关键词
nanowires; optical sensor; ZnO; SnO_2;

机译：纳米线;光学传感器氧化锌; SnO_2;

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Metal oxide nanowires for optical gas sensing

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