Adsorption effects of NO2 at ppm level on visible photoluminescence response of SnO2 nanobelts

Year: 2005

Authors: Faglia G., Baratto C., Sberveglieri G., Zha M., Zappettini A.

Autors Affiliation: INFM, I-25123 Brescia, Italy; Univ Brescia, Dept Chem & Phys Engn & Mat, Sensor Lab, I-25123 Brescia, Italy; CNR, IMEM, I-43010 Parma, Italy.

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 CO and NH3. 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. (C) 2005 American Institute of Physics.

Journal/Review: APPLIED PHYSICS LETTERS

Volume: 86 (1)      Pages from: 11923-1  to: 11923-3

More Information: This work has been partly supported by the European Commission in the project NMP4-CT-2003-001528 “Nano-structured sold-state gas sensors with superior performance” (NANOS4).
KeyWords: Optical-properties; Room-temperature; Growth; Luminescence; Nanoribbons; Sensors; Films
DOI: 10.1063/1.1849832

Citations: 130
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