电化学阻抗研究形核机理

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1、电化学阻抗研究形核机理导读：就爱阅读网友为您分享以下“电化学阻抗研究形核机理”资讯，希望对您有所帮助，感谢您对92to.com的支持!ElectrochemicalimpedancespectroscopystudyofthenucleationandgrowthofapatiteonchemicallytreatedpuretitaniumC.X.Wang*,M.WangSchoolofMechanicalandProductionEngineering,NanyangTechnologicalUniversity,50NanyangAvenue,Singa

2、pore639798,SingaporeReceived3July2001;accepted24July2001AbstractBone-likeapatiteformedonthesurfaceofpuretitaniumpretreatedwithNaOHsolutionafterhavingbeenimmersedinsimulatedbodyfluid(SBF).Inthepresentstudy,electrochemicalimpedancespectroscopy(EIS)measurementwasusedtoinvestigatethenuc

3、leationandgrowthofapatite17onchemicallytreatedpuretitaniumimmersedintheSBFsolution.Anappropriateequivalentcircuitmodelwasconstructedtodescribethenucleationandgrowthofapatite.ItwasfoundthatEISisausefulmethodforinvestigatingthenucleationandgrowthofbone-likeapatiteonpuretitaniumpretrea

4、tedwithNaOHsolution.Itmayquantifyapatitegrowthonpretreatedtitaniumsubstrates.D2002ElsevierScienceB.V.Allrightsreserved.Keywords:Electrochemicalimpedancespectroscopy;Alkalinetreatment;Puretitanium;Bone-likeapatite;Nucleationandgrowth1.IntroductionCalciumphosphateceramics,suchashydrox

5、y-apatite(HA)-coatedtitaniumanditsalloys,areamongthemostpromisingimplantmaterialsfororthopedicanddentalapplications.However,prob-lemssuchaslowbondstrengthbetweenthecoatingandthesubstrateandnonuniformityacrossthethick-nessofthecoatingareoftenencounteredwiththesecoatings[1].Recently,i

6、thasbeenreportedthatchemicallytreatedtitaniumcaninducebone-likeapatiteforma-tioninvitroandinvivo[2–4],whichmeans17thattitaniumanditsalloyshavepotentialbioactivity.TreatmentwithaNaOHsolutionproducesasodiumtitanategellayerontitaniumsurface.Thegellayerhastheabilitytoinduceformationofbo

7、ne-likeapatiteduringimmersinginsimulatedbodyfluid(SBF)and,thus,isconsideredbioactive.Thegellayercaninitiateapatitenucleationonitself.Onceapatitenucleationoccurs,itspontaneouslygrowsbytakingcalciumandphosphateionsfromthesur-roundingenvironment.Thequalitativeobservationofnucleationand

8、growthofapatiteonpr