Facet-Dependent and Adjacent Facet-Related Electrical Conductivity Properties of SrTiO 3 Crystals - Hsieh et al. - Unknown - Unknown

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SupportingInformationFacet-DependentandAdjacentFacet-RelatedElectricalConductivityPropertiesofSrTiO3CrystalsPei-LunHsieh,†,§MaheshMadasu,‡,§Chien-HsuanHsiao,‡,§Yun-WenPeng,‡,§Lih-JuannChen,*,†,§andMichaelH.Huang*,‡,§†DepartmentofMaterialsScienceandEngineering,‡DepartmentofChemistry,and§FrontierResearchCenteronFundamentalandAppliedSciencesofMatters,TsingHuaUniversity,Hsinchu30013,TaiwanSynthesisofCu2ORhombicuboctahedra.First,2.9948gofcopperacetateand75mLofdeionizedwaterwereaddedintoabeakerandkeptat70°C.Next,3.6gofNaOHdissolvedin10mLofdeionizedwaterwasintroducedandstirredfor5min,followedbytheadditionof0.6gofD-(+)-glucosewithstirringfor40min.Afterthereactionwiththesolutionreturningtoroomtemperature,thesolutionwascentrifugedat5000rpmfor5minandwashedwith40mLof1:1volumeratioofwaterandethanolthreetimes.Finally,Cu2Ocrystalsweredispersedin99%ethanolsolution.ProbePreparation.First,astraighttungstenwirewithadiameterof0.5mm(99.95%,StremChemicalsInc.)wascutintopieces,dippedintoa2.0MNaOHelectrolytesolution,andappliedacurrentof1Aat15Vtosharpenthetips.Thetipswereimmersedina10MNaOHsolutionfor5sectoremovesurfacetungstenoxidelayer,followedbydeionizedwatercleaning.Thetipdiameterisabout100nm.TiCl4WaterEthanolLiOHSrCl2·6H2OTemperatureTimeCubes26μL2.5mL1mL3.7mL(3M)0.07g70°C3hEthyleneTiCl4WaterHexanolLiOHSrCl2·6H2OTemperatureTimeGlycolTruncatedRhombicDodecahedra26μL40mL0.5mL0.7mL3.7mL(3M)0.07g200°C20hStir5minStir30minTiCl4/SrCl2·6H2OLiOHHeatVialinautoclaveH2O+partiallyfilledEG/hexanol/ethanolicebathwithwaterFigureS1.ReagentamountsandthereactionconditionusedforthegrowthofSrTiO3cubesand{100}-truncatedrhombicdodecahedra.S1

1a8b600c2000{100}to{100}{110}to{110}{110}to{110}61500400410002002500)))A0An0An0n(((III-2-500-200-4-1000-400-6-1500{100}to{100}{110}to{110}{110}to{110}-8-600-2000-20-15-10-505101520-6-4-20246-6-4-20246V(V)V(V)V(V)d50e50f{100}to{100}{100}to{100}1000{100}to{110}4040800303060020204001010200)))A0A0A0n(-10(nn(-200II-10I-20-20-400-30-30-600-800-40{100}to{100}-40{110}to{100}{100}to{100}-1000-50-50-6-4-20246-6-4-20246-6-4-20246V(V)V(V)V(V)FigureS2.MultipleI‒Vcurvesrecordedwithtungstenprobescontacting(a)opposite{100}facesofaSrTiO3cube,and(b)proximal{110}faces,(c)adjacent{110}faces,(d)proximal{100}faces,and(e)opposite{100}facesofasingleSrTiO3truncatedrhombicdodecahedron.(f)MultipleI‒Vcurvesrecordedwithtungstenprobescontactingsimultaneously{100}and{110}facesofaSrTiO3truncatedrhombicdodecahedron.Thecurrentissettoreachamaximumof1000nAtoprotecttheprobes.a1515{111}to{111}b{100}to{100}101055))A0A0n(n(II-5-5-10-10{111}to{111}{100}to{100}-15-15-6-5-4-3-2-10123456-6-5-4-3-2-10123456V(V)V(V)c15{110}to{110}105)A0n(I-5-10{110}to{110}-15-6-5-4-3-2-10123456V(V)FigureS3.MultipleI‒Vcurvesrecordedwithtungstenprobescontactingproximal(a){111},(b){100},and(c){110}facesofaCu2Orhombicuboctahedron.S2

2FigureS4.High-resolutionTEMimageofacornerofaSrTiO3cubeviewedalongthe[100]direction.Thelinesaredrawntoacrosscentersofinterioratoms.Thearrowsindicateregionsofpossibleshiftsinatomicpositions.S3