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1、Talanta72(2007)10771081AcetonevaporsensingpropertiesofscreenprintedWO3thickfilmsR.S.Khadayateb,J.V.Salia,P.P.Patila,∗aDepartmentofPhysics,NorthMaharashtraUniversity,Jalgaon425001,Maharashtra,IndiabG.D.M.Arts,K.R.N.CommerceandM.D.ScienceCollege,Jamner,Dist.Jalgao
2、n,Maharashtra,IndiaReceived18October2006;receivedinrevisedform31December2006;accepted31December2006Availableonline9January2007AbstractThispaperpresentsacetonevaporsensingpropertiesofWO3thickfilms.Inthiswork,theWO3thickfilmswerepreparedbystandardscreen-printingmet
3、hod.ThesefilmswerecharacterizedbyX-raydiffraction(XRD)measurements,andscanningelectronmicroscopy(SEM).Theacetonevaporsensingpropertiesofthesethickfilmswereinvestigatedatdifferentoperatingtemperatureandacetonevaporconcentrations.TheWO3thickfilmsexhibitexcellentacet
4、onevaporsensingpropertieswiththemaximumsensitivity∼456%at300◦Cinairatmospherewithfastresponseandrecoverytime.©2007ElsevierB.V.Allrightsreserved.Keywords:WO3thickfilm;Screenprinting;Acetonevapor1.Introductionetal.[11]havereportedacetonesensingpropertiesofSnO2thin
5、filmsdepositedbydipcoating.Also,Gongetal.[12]haveThestudiesontungstenoxide(WO3)filmshavedrawncon-reportedsensingpropertiesofSnO2thinfilmsdepositedbyther-siderableinterestbecauseoftheirgoodelectricalandopticalmaldepositiontechnique,forfiveorganicvapors,i.e.ethanol,p
6、roperties,incombinationwiththeirwidebandgap,abundancemethanol,acetone,isopropanolandaceticacid.innatureandabsenceoftoxicity.ThesepropertiesrendertheTheaimofthepresentstudyistopreparetheWO3thickfilmsWO3asaliablematerialforavarietyofapplications.Variousbyusingscre
7、en-printingmethodontoaluminasubstratesandtotechniqueshavebeenusedtopreparedopedorundopedWO3investigatetheirsensingpropertiesforacetonevapor.thinandthickfilms.Inrecentyears,WO3thickfilmshavebeenconsideredto2.Experimentalbethemostpromisingmaterialfordetectinggasesl
8、ikeNO2,CH4,NH3,H2SandCO[16].ThescreenprintingisafeasibleTheWO3powder(purity∼99.99%)wasmechanicallymilledandeconomicalmethodtopreparethethickfilmsofvariousinanacetonemediumusi
