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1、The2ndInternationalConferenceonNANOMATERIALSANDNANOTECHNOLOGIES(NN2005)CretaMarisHotel,Hersonessos,Crete,GreeceJune14–18,2005ABSTRACTS(Preliminaryversion)Website: http://www.ipme.ru/ipme/conf/NN2005/ INTERNALSTRESSANALYSISFORNANOSTRUCTUREDLi-BATTERYELECTRODESK
2、.E.AifantisDAMTP,CentreforMathematicalSciences,Cambridge,UKDuetothesmallLi-intercalationofcarbon,whichisusedasthebasematerialforthenegativeelectrodeinrechargeableLi-batteries,extensiveresearchisbeingperformed,forovertwodecadesinordertofindalternativeanodemater
3、ials.ThisresearchhassuggestedthatsomeofthebestcandidatesareSnandSi,duetotheirhighcapacity.Thesematerials,however,havenotbeenusedcommerciallybecauseoftheirlargevolumeexpansion,whichresultsincrumblingoftheelectrodeaftercontinuouselectrochemicalcycling.Itistheref
4、oreofgreatimportancetomodeltheinternalstressdevelopmentinsidetheseanodes.Sincetheminiaturizationofthehigh-energystoragedevicesathandisdesired,gradientelasticityisemployedtocapturesizeeffectsasthescaleofthemicrostructureisreducedtothenanoscale;comparisonwithsol
5、utionsobtainedfromclassicalelasticityaremade.Spontaneousself-agglomerationofmagneticnanoparticlesintonanowiresI.Alexandrou1,D.K.H.Ang1,G.A.J.Amaratunga2,S.Haq31.ElectricalEngineeringandElectronics,UniversityofLiverpool,Liverpool,UK2.DepartmentofEngineering,Cam
6、bridgeUniversity,Cambridge,UK3.BAESystems,AdvancedTechnologyCentre,Bristol,UKAnewlydevelopedmethodfortheformationofnanowiresbyself-aggregationofnanoparticlesispresentedinthispaper.ThefirstexperimentshavebeenperformedusingCo-richnanoparticlesdispersedonaholeyca
7、rbongrid.Thenanoparticlesareinsertedinavacuumovenandareannealedattemperaturesbelow400Cinthepresenceofahydrocarbonvapourwithouttheuseofanyexternallyappliedelectricormagneticfields.Highresolutionelectronmicroscopy(HREM)wasextensivelyusedtodeterminetheshape,sized
8、istributionandcrystallographicphaseofthestartingandproducedmaterials.Interestingly,afteranannealingcircleof72hours,thenanoparticlesseemtoself-agglomerateintonanowireswhichhavediame
