Adsorption effects of NO2 at ppm level on visible photoluminescence response of SnO2 nanobelts
- 28 December 2004
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 86 (1) , 011923
Abstract
The visible photoluminescence (PL) of tin oxide nanobelts 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 and . We believe that adsorbed gaseous species that create surface states can quench PL by creating competitive nonradiative paths. A comparison between conductometric and PL response suggests that the two responses are ascribable to different adsorption processes.
Keywords
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