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1、物理化學學~(WuliHuaxueXuebao1ActaP.-Chim.Sin.2011,27(2),468—472February[Article]、^,~.whxb.pku.edu.cn電沉積制備ZnO納米棒修飾電極上氧化還原蛋白的電化學行為韓楠楠王慧栗娜周劍章·林仲華1,2吳迪。萬國江s,(廈門大學固體表面物理化學國家重點實驗室,福建廈門361005;廈門大學化學化工學院化學系,福建廈門361005;。西南交通大學材料科學與工程學院,成都610031)摘要:采用恒電位陰極還原法在金電極表面~步修飾ZnO納米棒,制各成ZnO納米棒修飾電極.掃描電子顯微鏡(SEM)和X射
2、線衍射(XRD)結果顯示制得的ZnO為直徑約1O0nm的六棱柱狀纖鋅礦晶體納米棒.使用ZnO納米棒修飾的金電極研究細胞色素C的直接電化學行為,結果表明:ZnO納米棒修飾的金電極能有效探測到細胞色素C的鐵卟啉輔基在不同價態(tài)下的電化學行為:細胞色素C吸附后,ZnO納米棒修飾的金電極對過氧化氫的電流響應呈現(xiàn)良好的線性關系.關鍵詞:ZnO納米棒:電沉積:氧化還原蛋白:細胞色素c中圖分類號:0646ElectrochemicaIBehaviorofRedoxProteinsonZnONanorod.MedifiedElectrodesPreparedbyElectrodepositi
3、onHANNan—NanWANGHuiLINaZHOUJian—Zhang·LINZhong—Hua’,WUDi。WANGuo-Jiang。,CStateKeyLaboratoryofPhysicalChemistryoffheSoEtdS"lce,XiamenUniversiXiamen361005,FujianProvince.PR.China;2DepartmentofChemistry,CollegeofChemicalEngineering,XiamenUniversity,Xiamen361005,FujianProvince,R.China;’Schoolof
4、MaterialsScienceandEngineering,SouthwestJiaotongUniversity,Chengdu61003I,R.China)Abstract:WesuccessfuIlypreparedZnOnanorod—modifiedAu(ZnOnanorod/Au)electrodesusingone-stepcathodicelectrodeposition.Scanningelectronmicroscopy(SEM)andX-raydiffraction(XRD)wereusedtocharacterizethemorphologyand
5、crystalphaseoftheZnOnanorods.ThedatashowedthattheZnOnanorodswerewurtzitetypecrystalswithahexagonalrodshapeandadiameterofabout10OnmandthattheZnOnanorodswerearrangedwellOI3thesurfaceofelectrodes.TheseZnOnanorod.modifiedelectredeswereabletodetectdirectelectrontransferfromcytochromeC(cytc).Cyc
6、licvoltammogramsshowedthatthedirectelectrontransferofcytCwithhemeironindifferentvalencestateswaseasilyachievedbytheZnOnanorod/Auelectrode.DataofamperometricresponsesdemonstratedthataIinearamperometricresponsetohydrogenperoxidewasobse~edontheZnOnanorod/AuelectrodesafteradsorbingcytC.KeyWord
7、s:ZnOnanorod;Electrodeposition;Redoxprotein;CytochromeC1引言對于理解和認識它們在生命體內(nèi)的電子轉移機制和研究氧化還原蛋白在電極上的直接電化學行為生理作用具有重要的理論和實際意義.細胞色素CReceived:September26.2010;Revised:November12,2010;PublishedonWeb:December22,2010.Correspondingauthors.ZHOUJian.Zhang,Email:izzhou@xmu.edu.