DSpace UNL

RUN >
Faculdade de Ciências e Tecnologia (FCT) >
FCT R&D Units >
FCT: CENIMAT - Centro de Investigação de Materiais >
FCT: CENIMAT - Artigos em revista internacional com arbitragem científica >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10362/3243

Título: Zinc oxide as an ozone sensor
Autor: Martins, Rodrigo
Fortunato, Elvira
Nunes, P.
Ferreira, I.
Marques, A.
Bender, M.
Katsarakis, N.
Cimalla, V.
Kiriakidis, G.
Issue Date: Aug-2004
Editora: American Institute of Physics
Resumo: This work presents a study of intrinsic zinc oxide thin film as ozone sensor based on the ultraviolet sUVd photoreduction and subsequent ozone re oxidation of zinc oxide as a fully reversible process performed at room temperature. The films analyzed were produced by spray pyrolysis, dc and rf magnetron sputtering. The dc resistivity of the films produced by rf magnetron sputtering and constituted by nanocrystallites changes more than eight orders of magnitude when exposed to an UV dose of 4 mW/cm2. On the other hand, porous and textured zinc oxide films produced by spray pyrolysis at low substrate temperature exhibit an excellent ac impedance response where the reactance changes by more than seven orders of magnitude when exposed to the same UV dose, with a response frequency above 15 kHz, thus showing improved ozone ac sensing discrimination.
Descrição: Journal of Applied Physics, Vol. 96, nº3
URI: http://hdl.handle.net/10362/3243
ISSN: 0021-8979
Appears in Collections:FCT: CENIMAT - Artigos em revista internacional com arbitragem científica

Files in This Item:

File Description SizeFormat
Fortunato_2004.pdf596,87 kBAdobe PDFView/Open
Statistics
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Universidade Nova de Lisboa  - Feedback
Estamos no RCAAP Governo Português separator Ministério da Educação e Ciência   Fundação para a Ciência e a Tecnologia

Financiado por:

POS_C UE