Fabrication of single polymer nanopore and its applications in life and energy science，2009先进纤维与聚合物材料国际学术会议（ICAFPM，10.21-10.24，上海）-中国聚合物网,论文下载

Fabrication of single polymer nanopore and its applications in life and energy science

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分子表征

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2009先进纤维与聚合物材料国际学术会议（ICAFPM，10.21-10.24，上海）

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Singleconicalnanoporeswithtipdiameterrangedfromseveralnmtohundredofnmwerefabricatedbyetchingofsingleheavyiontrackinpolymermembrane,andtheirasymmetricalconductancebehaviorinelectrolytewereinvestigatedexperimentallyandtheoretically(NIMB,2008;PRE,2007).Basedonthesingleconicalnanopore,twokindsofsyntheticnanopore-DNAsystemswerefabricatedandtheycanbereversiblygatedbyswitchingDNAmotorsimmobilizedinsidethenanopores.Thisnovelnanopore-DNAsystem,whichwasgatedbycollectivefoldingofstructuredDNAmoleculesrespondingtotheexternalstimulus,forexample,pHvalueandK+ionconcentration,providedanartificialcounterpartofswitchableprotein-madenanoporechannels(JACS,2008,2009,highlightedbyNatureandNatureChinarespectively).Inaddition,modifiedwithPNIPAMbrushes,atemperature-responsivenanoporewasfabricated,whichcanmimicbiologicalKirchannelswell(Small,inrevision).Throughthesingletracketchednanopore,electricalpowergenerateswhenelectrolytewasdrivenbecauseofnano-scaleporeradiusandhighsurfacechargedensity.Theexperimentindicatesthatstreamingcurrentincreaseforlowelectrolyteconcentrationandthehighestenergyconversionefficiencywasobtained(APL,2008).Finally,basedonthesingleconicalnanoporeinpolymermembrane,aconcentrationgradientdrivenIoniccurrentsourcewillbedemonstrated,inwhichtheambientenergyintheformofionconcentrationgradientcanbeharvestedintouseableelectricenergy.

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WANG Yugang

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2010-04-07 11:24:27

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