HERRMANN JUNIOR, P. S. de P.

MANZOLI, A.

PASCHOALIN, R. T.

STEFFENS, C.

ZAVITOSKI, P. C.

Repository Open Access to Scientific Information from Embrapa

ICAM2009We hereby certify that the work"The substrate effect in the developing disposable sensor using line patterningtechnique of graphite" (1557)by the authors Alexandra Manzoli, Clarice Steffens, Rafaella T Paschoalin, Pedro CezarZavitoski and Paulo Sergio de Paula Herrmannwas presented on Poster form byALEXANDRA MANZOLlin the 11th International Conference on Advanced Materiais - ICAM 2009,occurred in Rio de Janeiro-RJ between september 20th to september 25th, 2009.Rio de Janeiro-RJ, september 25th, 2009.{}AàJGuillermo SolorzanoChairman ICAM 2009Elisa SaitovitchProgram Chair11th International Conferenceon Advanced MateriaisRio de .Janeiro BrozilICAM2009 September 20 - 25The substrate effect in the developing disposable sensor using line patterningtechnique of graphiteA. Manzoli(1)·,C. Steffens (1), R.T. Paschoalin'", P.C. Zavitoski'" and P.S.P.Herrmann Jr.(1)(1) Alan G. MacDiarmid Institute for Innovation and Business and National NanotechnologyLaboratory for Agribusiness (LNNA), Embrapa Agricultural Instrumentation, P. O. Box 741, 13560-970, São Carlos, SP, Brazil, e-mail: alexandra@cnpdia.embrapa.br* Corresponding author:Abstract -In Ihis work lhe influence of lhe differenl subslrales (vellum paper and PET (poly(elhylene terephthatatej) in lhesensors performance was invesligaled. The eleclrodes were developed by lhe line-patterning lechnique and polyaniline Ihin films wereoblained by "in situ" deposilion in lhe emeraldine oxidalion state, The performance of Ihese sensors when submitted at differenlenvironmenlal condilions was evalualed using lhe eleclronic nose syslem and lhe resulls indicaled Ihal lhe substrates have influenceon lhe sensor behavior.The conducting polymers have attracted great attention due to its scientific importance and potentialtechnological applications. The polyaniline (PANI) is the conducting polymer that has been most extensivelystudied, due to their mechanical, electrical and physico-chemical characteristics, making possible thedevelopment of innovative electronic devices [1]. The disposable sensors made of conducting polymers,using line patterning technique [2] have many improved characteristics in comparison with most of thecommercially available sensors, based usually on metal oxides and operated at high temperatures. Theyhave good sensitivities and short response time, these characteristics are especially ensured at roomtemperature.In this work was investigated the influence of two substrates, vellum paper and PET on the electricalproperties of sensors. These sensors were constructed using line patterning technique (LPT), to developedinterdigitated patterns of graphite deposited on two substrates and coated with a thin film of polyaniline by "insitu" polymerization method. The performance these electrodes in, alternating, static laboratory air (10minutes) and in flow of dry nitrogen (10 minutes) at room temperature, repeating this procedure three timeswas investigated by electrical properties measurements using electronic nose. According to this procedure,the sensibility (S %) and reversibility (fl %) of each sensor were evaluated, whose results are listed in theTable I.It can be observed that the sensibility of the senso r obtained with the vellum paper substrate was46% more sensitive than the other sensor (PET substrate). However the senso r obtained with PET substrateshowed higher reversibility. These results indicated that the substrate has influence on the performance ofthe sensors.Table I: Reversibilit and sensibilit values of the sensors obtained in different substrates.Pani-PET Pani-Vellum a erS (%)'l (%)11,7 (± 0,53) 21,69 (± 0,25)95,1 ± 4,8 88,4 ± 2,26[1] A.G. MacDiarmid, Synthetic MetaIs, 84 (1997) 27.[2] E. C. Venancio, L. H. C. Mattoso, P. S. de P. Herrmann Jr and A. G. MacDiarmid, Sensors and ActuatorsB: Chemical, 130 (2008) 723.

The substrate effect in the developing disposable sensor using line patterning technique of graphite.

RCAAP - Repositório Científico de Acesso Aberto de Portugal

http://www.alice.cnptia.embrapa.br/alice/bitstream/doc/576732/1/Proci09.00140.pdf

The substrate effect in the developing disposable sensor using line patterning technique of graphite.

Abstract

Similar works

Full text

Available Versions

Repository Open Access to Scientific Information from Embrapa

RCAAP - Repositório Científico de Acesso Aberto de Portugal