The optical response at room temperature of ZnO nanostructures, grown by controlled vapour phase deposition, to low concentrations of NO2 gas mixed in dry-air has been investigated. In particular the quenching in the emission signal, due to the interactions between oxidizing gas molecules and sample surface, has been monitored in excitonic and defect band, as a function of gas concentration. The dynamic responses and the resulting calibration curves, obtained for each emission band, have been compared. Furthermore responses of nanorods with different size and nanostructures with different exotic shape have been discussed in order to clarify the role of the morphology and/or dimensions and structural quality. In particular we have correlated the growth conditions and the resulting structural and optical properties of the samples, highlighting their role in the optical sensing response.

NO2 Optical Sensing in ZnO Nanostructures

A Taurino;C Martucci;F Quaranta;M Lomascolo;R Rella;P Siciliano;
2008

Abstract

The optical response at room temperature of ZnO nanostructures, grown by controlled vapour phase deposition, to low concentrations of NO2 gas mixed in dry-air has been investigated. In particular the quenching in the emission signal, due to the interactions between oxidizing gas molecules and sample surface, has been monitored in excitonic and defect band, as a function of gas concentration. The dynamic responses and the resulting calibration curves, obtained for each emission band, have been compared. Furthermore responses of nanorods with different size and nanostructures with different exotic shape have been discussed in order to clarify the role of the morphology and/or dimensions and structural quality. In particular we have correlated the growth conditions and the resulting structural and optical properties of the samples, highlighting their role in the optical sensing response.
2008
Istituto per la Microelettronica e Microsistemi - IMM
978-1-4244-2580-8
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/16716
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact