Electronic states of disordered grain boundaries in graphene prepared by chemical vapor deposition

《Electronic states of disordered grain boundaries in graphene prepared by chemical vapor deposition》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、CARBON64(2013)178–186Availableatwww.sciencedirect.comjournalhomepage:www.elsevier.com/locate/carbonElectronicstatesofdisorderedgrainboundariesingraphenepreparedbychemicalvapordepositiona,b,*a,ba,ca,bPe´terNemes-Incze,Pe´terVancso´,Zolta´nOsva´th,Ge´za

2、I.Ma´rk,b,db,fb,deXiaozhanJin,Yong-SungKim,ChanyongHwang,PhilippeLambin,ca,bClaudeChapelier,La´szlo´Pe´terBiro´aInstituteofTechnicalPhysicsandMaterialsScience,CentreforNaturalSciences,P.O.Box49,1525Budapest,HungarybKorean-HungarianJointLaboratoryforNa

3、nosciences(KHJLN),P.O.Box49,1525Budapest,HungarycSPSMS,UMR-E9001,CEA-INAC/UJF-Grenoble1,17RuedesMartyrs,38054Grenoblecedex9,FrancedCenterforNano-metrology,DivisionofIndustrialMetrology,KoreaResearchInstituteofStandardsandScience,Yuseong,Daejeon305-340

4、,RepublicofKoreaeUniversityofNamur(FUNDP),61RuedeBruxelles,B-5000Namur,BelgiumfCenterforNanocharacterization,DivisionofIndustrialMetrology,KoreaResearchInstituteofStandardsandScience,Yuseong,Daejeon305-340,RepublicofKoreaARTICLEINFOABSTRACTArticlehist

5、ory:Perturbationsofthetwodimensionalcarbonlatticeofgraphene,suchasgrainboundaries,Received29January2013havesignificantinfluenceonthechargetransportandmechanicalpropertiesofthismate-Accepted20July2013rial.Scanningtunnelingmicroscopymeasurementspresentedh

6、ereshowthatlocalizedAvailableonline26July2013statesneartheDiracpointdominatethelocaldensityofstatesofgrainboundariesingraphenegrownbychemicalvapordeposition.Suchlowenergystatesarenotreproducedbytheoreticalmodelswhichtreatthegrainboundariesasperiodicdi

7、slocation-corescom-posedofpentagonal–heptagonalcarbonrings.Usingabinitiocalculations,wehaveextendedthismodeltoincludedisorder,byintroducingvacanciesintoagrainboundaryconsistingofperiodicdislocation-cores.Withintheframeworkofthismodelwewereabletoreprod

8、ucethemeasureddensityofstatesfeatures.Wepresentevidencethatgrainboundariesingraphenegrownoncopperincorporateasignificantamountofdisorderintheformoftwo-coordinatedcarbonatoms.Ó2013ElsevierLtd.Allrightsreserved.1.Introductionpropertiesandbehavior