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1、FULLPAPERZincOxideNanoparticleswithDefects**ByVladislavIschenko,SebastianPolarz,*DirkGrote,VictorinaStavarache,KarinFink,andMatthiasDriess*DedicatedtoR.Kniepontheoccasionofhis60thbirthdayZincoxideintheformofnanoscalematerialscanberegardedasoneofthemostimportantsemiconductoro
2、xidesatpresent.However,thequestionofhowchemicaldefectsinfluencethepropertiesofnanoscalezincoxidematerialshasseldombeenaddressed.Inthispaper,wereportontheintroductionofdefectsintonanoscaleZnO,theircomprehensiveanalysisusingacombinationoftechniques(powderX-raydiffraction(PXRD)
3、,X-rayabsorptionspectroscopy/extendedX-rayabsorptionfinestructure(XAS/EXAFS),electronparamagneticresonance(EPR),magic-anglespinningnuclearmagneticresonance(MAS-NMR),Fourier-transforminfrared(FTIR),UV-vis,andphotoluminescence(PL)spectroscopiescoupledwithab-initiocalcula-tions
4、),andtheinvestigationofcorrelationsbetweenthedifferenttypesofdefects.Itisseenthatdefect-richzincoxidecanbeobtainedunderkineticallycontrolledconditionsofZnOformation.Thisisrealizedbythethermolysisofmolecular,organome-tallicprecursorsinwhichZnOispre-organizedonamolecularscale.
5、ItisseenthattheseprecursorsformZnOatlowtempera-turesfarfromthermodynamicequilibrium.TheresultingnanocrystallineZnOisrichindefects.Dependingonconditions,ZnOofhighmicrostructuralstrain,highcontentofoxygenvacancies,andparticularcontentofheteroatomimpuritiescanbeob-tained.Itissh
6、ownhowthementioneddefectsinfluencetheelectronicpropertiesofthesemiconductornanoparticles.1.Introductionofextraordinaryimportanceandasubstantialnumberofpa-[5]pershavebeenpublishedreportingonZnOnanostructures.Thereasonfortheªnano-hypeºthat,recently,hasconqueredTheapplicationof
7、ZnOrangesfromcatalysisviagassensingtoalldisciplinesofnaturalsciencesistheobservationthatproper-UV-lightemitters,ceramicvaristors,transparenthigh-powertiesofmaterialsdependnotonlyoncompositionbutalsoonelectronics,surfaceacousticwavedevices,andpiezoelectric[6]morphology(sizean
8、dshape).Formaterialswithatleastonetransducers.Ofparticularinterestisalsothe
