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1、電化學(xué)阻抗研究形核機(jī)理導(dǎo)讀：就愛閱讀網(wǎng)友為您分享以下“電化學(xué)阻抗研究形核機(jī)理”資訊，希望對(duì)您有所幫助，感謝您對(duì)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
