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1、BIOS-2174;No.ofPages7BiosensorsandBioelectronicsxxx(2006)xxxxxxElectrochemicalbiosensingutilizingsynergicactionofcarbonnanotubesandplatinumnanowirespreparedbytemplatesynthesisFengliQu,MinghuiYang,GuoliShen∗,RuqinYuChemistryandChemicalEngineeringCollege,StateKeyLaboratory
2、ofChemo/BiosensingandChemometrics,HunanUniversity,Changsha410082,PRChinaReceived21April2006;receivedinrevisedform31July2006;accepted9August2006AbstractPlatinumnanowires(PtNWs)preparedbyelectrodepositionmethodwiththehelpofporousanodicaluminumoxide(AAO)templateshavebeensol
3、ubilizedinchitosan(CHIT)togetherwithcarbonnantubes(CNTs)toformaPtNWCNTCHITorganicinorganicsystem.TheresultingPtNWCNTCHITmaterialbringscapabilitiesforutilizingsynergicactionofPtNWsandCNTstofacilitateelectron-transferprocessinelectro-chemicalsensordesign.ThePtNWCNTCHITfilmm
4、odifiedelectrodeofferedasignificantdecreaseintheovervoltageforthehydrogenperoxideandshowedtobeexcellentamperometricsensorsforhydrogenperoxideat−0.1Voverawiderangeofconcentrations,andthesensitivityis260AmM−1cm−2.Asanapplicationexample,bylinkingglucoseoxidase(GOx),anamplifie
5、dbiosensortowardglucosewasprepared.Theglucosebiosensorexhibitsaselectivedeterminationofglucoseat−0.1Vwithalinearresponserangeof5×10−6to1.5×10−2Mwithacorrelationcoefficientof0.997,andresponsetime<10s.Thehighsensitivityoftheglucosebiosensorisupto30AmM−1cm−2andthedetectionl
6、imitwas3M.Thebiosensordisplaysrapidresponseandexpandedlinearresponserange,andexcellentrepeatabilityandstability.©2006ElsevierB.V.Allrightsreserved.Keywords:Aluminatemplatemembrane;Biosensor;Electrodeposition;Enzyme;Nanowire1.Introductionitslowcost(Ganetal.,2004;Konishie
7、tal.,2003;Piaoetal.,2005).NanostructuredmaterialsareattractiveduetotheirnovelInthecaseofnanowires,electrodepositionisprovingtobeoptical,electrical,catalytic,andmagneticpropertiesandanincreasinglyattractiverouteforthepreparationofnanostruc-havefoundpotentialapplicationsin
8、nanoelectronicdevices,turedmaterialduetoitslowcost,theuseofsimpleequipment,nanosensors,andcatalysts(Hua
