资源描述：
《Graphene in 3-DimensionsTowards 》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、ADVANCEDMATERIALSResearchNewsGraphenein3-Dimensions:TowardsGraphiteOrigamiByThomasW.Ebbesen*andHidefumiHiura1.Introductionthennanotubeswereobservedr3]andsynthesizedonalarge~ca1e.L~.51TheoreticalcalculationsonnanotubessuggestedCarbonisanextraordinaryelementbythediversityo
2、fthattheirpropertieswouldvarysignificantlyaccordingtomaterialsitcanform.Thisisintimatelytiedtothefactthattheirdiameterandtheirhelicity.[6,Moreimportantly,itthesandporbitalsofcarboncanhybridizeintosp,sp2andwasrealizedthatifonecouldcontrolthegeometryofsp3.Forinstance,among
3、typicalformsofpurecarbon,onegraphiteonecouldcontrolitsproperties.[*]However,couldfindsatoneextremitydiamond(puresp3)andatanotheroneachievetailor-madegraphite?Whatarethebasicrules?graphite(puresp2).Classically,thetypeofhybridizationofTheseissuesarethesubjectofwhatfollows.
4、Itnaturallythecarbonatomsisalsothoughttodeterminethebasicleadstothepossibilityofgraphiteorigamiwhichwasin-dimensionalityofthematerial.Forexample,diamondisaspiredbytheformationofstructuressuchasthemultiplythree-dimensionalsolidwhilegraphiteisformedoftwo-di-foldedgraphitic
5、ribbonshowninFigure1.mensionalsheets.Howeverinthelasttenyears,ourunder-standinginthisrespecthasdramaticallychanged.Itstartedwiththesuggestion,basedonexperimentalevi-dence,oftheexistenceofsphericalmolecules(C,,andCJmadeofpurecarbonin1985.['1Thishadanenormousim-pactbothona
6、materiallevelandaconceptuallevel.Onthematerialside,itresultedinanincreasedresearchactivityoncarbonclusterswhichexplodedwiththediscoveryofthelargescalesynthesisofC,,andtheotherfullerenesin1990.[21Theenormousinterestinthefullereneswasduetothefactthatawholenewclassofmolecul
7、armaterialwassuddenlyavailablemadeonlyofcarbon,beingspherical,acage,etc.,somanyscientistsexpectedthatthisuniquematerialwouldalsohaveuniqueproperties.Moreover,athree-dimensionalgraphiticstructurehadbeenmadebysimplyintroducing12pentagonsinthehexagonalnetwork.Thiswasimporta
8、ntFig.1.AFMpictureofagraphiticribbonfolded4timesonthesurfaceofbecauseitwasquicklyrealizedthatahostofclo
