Areshkin-2007-Building blocks for.pdf

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1、NANOLETTERSBuildingBlocksforIntegratedGraphene2007Vol.7,No.11Circuits3253-3259DenisA.Areshkin*,†andCarterT.White‡GeorgeWashingtonUniVersity,Washington,DC20052,NaValResearchLaboratory,Washington,DC20375ReceivedMarch26,2007;RevisedManuscriptReceivedMay30,2007ABST

2、RACTTheobservationofsinglesheetsofgraphite(graphene)presentsnewpossibilitiesforcarbon-basednanoelectronics.Wereportdefecttolerantconfigurationsforanearlyreflectionless120°turnandnearlyreflectionlesssymmetricandasymmetricsplitters,whichcanbecutfromgraphene.Conne

3、ctionsbetweenzigzagstripsofdifferentwidthscanbemadewitheitherloworhighreflectancedependingontheconnectionshape.Therecentobservationofisolatedgraphitesheets(graphene)attemptstocreateall-grapheneelectronicnanodevicesandsupportedbyinsulatingsubstrates1-4providesne

4、wpossibili-circuitspatternedfromeitherasinglegrapheneplaneortiesforcarbon-basednanoelectronics.Thepotentialimpor-multipleplanesseparatedbylayersofinsulatingmaterial.tanceofgrapheneasanelectronicmaterialispartiallybasedEithercircuitconceptrequirespassiveelements

5、andintercon-uponthefollowingproperties:(1)Easyatomicplanenectsforwiringindividualcircuitelements.Thewiringturnslaminationandstrongbondingwithintheplanemakeouttobeanontrivialissuebecauseasweshallseeonlyagraphenefabricationtechnologicallyaccessiblethroughbothfews

6、pecificGNSpatternsthathavenearlyidealconductancemechanicalexfoliation2,3andepitaxialgrowth.4(2)Devicesandcantransmitelectronfluxwithoutlosses.Mostotherandintegratedcircuits(ICs)couldbeprocessedfromapatternspossesssubstantialreflectivityandcannotbeusedgraphenesh

7、eetusingtheexistingplanartechnologies:forwiringpurposesdespitetheirmetallicnature.Inthiselectron-orion-beamlithography5-7ordirectfocusedpaper,wesuggestgeometricalconfigurationsfor(1)reflec-electron8orion-beam9writing.Thelattertwocouldbeverytionlessinterconnects

8、and(2)highlyreflectivepatternsprecisebecauseofthelowelectronorionfluxrequiredforanalogoustoresistors.carvingasingleatomicplane,whichdecreasestheCoulombPerhapsitiseasiesttomo