Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/100850
Type: Artigo de periódico
Title: Evaluation Of Nafion-crystal Violet Films For The Construction Of An Optical Relative Humidity Sensor
Author: Raimundo Jr. I.M.
Narayanaswamy R.
Abstract: The composition of Nafion-Crystal Violet films and casting processes were studied in order to optimise the performance of an optical relative humidity sensor. The films were immobilised on a glass disc support, by placing a 5.0 μL drop of a methanolic solution of a mixture of various compositions (molar ratio) of Nafion and Crystal Violet. The homogeneity of the films, and also their reversibility to humidity, increased when the molar ratio of Nafion to Crystal Violet was increased. The homogeneity was even further improved when these films were treated with a 5.0 μL drop of methanol, leading to films of higher durability. The durability of films decreased with decrease in the film thickness. A methanol-treated, 5 μm thickness film with a Nafion:Crystal Violet molar ratio of 10.1 showed a linear response range from 30 to 70% relative humidity (r2 > 0.99), with good stability and reversibility.
Editor: 
Rights: aberto
Identifier DOI: 10.1039/a905264j
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0032700932&partnerID=40&md5=cf0a14ee4d12041da117055dcca2ecb9
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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