Metal oxide nanowires for optical gas sensing

C. Baratto; S. Bianchi; E. Comini; G. Faglia; M. Ferroni; G. Sberveglieri

doi:10.1117/12.713647

20 February 2007 Metal oxide nanowires for optical gas sensing

C. Baratto, S. Bianchi, E. Comini, G. Faglia, M. Ferroni, G. Sberveglieri

Proceedings Volume 6474, Zinc Oxide Materials and Devices II; 64741E (2007) https://doi.org/10.1117/12.713647
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

SnO₂ 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.

Citation Download Citation

C. Baratto, S. Bianchi, E. Comini, G. Faglia, M. Ferroni, and G. Sberveglieri "Metal oxide nanowires for optical gas sensing", Proc. SPIE 6474, Zinc Oxide Materials and Devices II, 64741E (20 February 2007); https://doi.org/10.1117/12.713647

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