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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Grazing Angle Photoluminescence of Porous Alumina as an Analytical Transducer for Gaseous Ethanol Detection

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Guerreiro, Haroldo A. [1, 2] ; Trivinho-Strixino, Francisco [3] ; Chiquito, Adenilson J. [2] ; Guimaraes, Francisco E. G. [4] ; Pereira, Ernesto C. [5]
Total Authors: 5
[1] Univ Fed Amazonas, Inst Ciencias Exatas, Dept Fis, BR-69077000 Manaus, Amazonas - Brazil
[2] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Fed Sao Carlos, Dept Fis Quim & Mat, BR-18052780 Sorocaba, SP - Brazil
[4] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[5] Univ Fed Sao Carlos, Dept Quim, LIEC, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Nanoscience and Nanotechnology; v. 14, n. 9, p. 6653-6657, SEP 2014.
Web of Science Citations: 6

Porous alumina was used to build an optical sensor for gaseous ethanol detection. The photoluminescence collected in a grazing angle was used as a transducer signal. The photoluminescence detected with this optical setup shows well resolved Fabry-Perot type interference fringes at room temperature, whose position and shape are strongly dependent on the ethanol fraction adsorbed on the porous alumina surface. According to the surface porous morphology, different finesse and resolution between the emission fringes were observed. The analytical response of the sensor was tested in terms of spectral displacement of the fringes when in contact with gaseous ethanol. The sensor was tested for different temperatures and at 25 C it presented the highest sensibility. The difference in the sensibility is a function of the temperature and can be related both to the modification of ethanol vapor pressure and the kinetics of adsorption processes at the walls of the glass cell and the porous alumina sample. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 10/10813-0 - Preparation of nanostructures oxides films using electrochemical methods for sensor purposes
Grantee:Francisco Trivinho Strixino
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 10/07794-4 - Developing of metallic multilayers for electrocatalysis
Grantee:Ernesto Chaves Pereira de Souza
Support type: Regular Research Grants