Organic vapour discrimination using sorption sensitive chemocapacitor arrays

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

An interdigital chemocapacitor (IDC) sensor array has been developed to discriminate organic vapour samples with pure organics and mixtures. Sensors were coated with diverse polymers (PEUT, PDMS and modified PDMS). Dedicated signal conditioning circuits were developed with a reduced S/N ratio enabling measurement of capacitance changes as low as 0.07 fF. A new sampling technique was also developed to improve isobaric sampling conditions on the sensors chamber. Linear techniques such as Principal Component Analysis (PCA) for discrimination between the different samples were sucessfully applied. As far as we know, this is the first time that an array of interdigital chemocapacitors is used for organic vapour discrimination.

Original languageEnglish
Title of host publicationFast Software Encryption - 14th International Workshop, FSE 2007, Revised Selected Papers
EditorsP. M. Vilarinho
PublisherTrans Tech Publications Ltd
Pages1064-1067
Number of pages4
EditionPt. 2
ISBN (Print)978-087849402-6
DOIs
Publication statusPublished - 1 Dec 2006
Event3rd International Materials Symposium and 12th Portuguese Materials Society Meeting 2005 - Aveiro, Portugal
Duration: 20 Mar 200523 Mar 2005

Publication series

NameMaterials Science Forum
PublisherTrans Tech Publications Ltd
NumberPART 2
Volume514-516
ISSN (Print)0255-5476

Conference

Conference3rd International Materials Symposium and 12th Portuguese Materials Society Meeting 2005
CountryPortugal
CityAveiro
Period20/03/0523/03/05

Keywords

  • Chemocapacitors
  • Polymer sorption
  • Sensor arrays

Fingerprint Dive into the research topics of 'Organic vapour discrimination using sorption sensitive chemocapacitor arrays'. Together they form a unique fingerprint.

  • Cite this

    Igreja, R., & Dias, C. J. (2006). Organic vapour discrimination using sorption sensitive chemocapacitor arrays. In P. M. Vilarinho (Ed.), Fast Software Encryption - 14th International Workshop, FSE 2007, Revised Selected Papers (Pt. 2 ed., pp. 1064-1067). (Materials Science Forum; Vol. 514-516, No. PART 2). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.514-516.1064