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Lasergainmaterialprintinglargepatterngraphene,Teammembers:GuLinaRenTianxinZhaoXu,Aboutlaserincreasematerialmanufacturing3Dprinting,Aboutgrapheme,Aboutlaserincreasetoprintgraphene,Letsgoandlearnsomethingaboutthe3Dprintingtechnology,Whatisa3Dprinting?Definitionof3DprintingPrincipleof3DprintingThemacro3DprintingMicro/nanograde3DprintingApplicationof3Dprintingtechnology,Thedevelopmentof3Dprintingtechnology,Inrecentyears,infrontofeveryonetherewasacoolnewword-3Dprinting.Although3Dprintingisstillabigdistancewithourlife,butthrough3Dprinting,whichcanbesuccessfullyprinttheunmannedaircraft,bicycles,carsandotherphysicalobjects.3Dprintinghasgraduallybegantobeusedbysomecompanies.,Whatisa3Dprinting?,Thetechnologyoflaserrapidprototypingcommonlyknownas3Dprinting,whichisakindofgetridoftraditionalcuttingtool,fixtureandmachinetoolprocessing,accordingtothepartsoronlyobjectsof3DCADmodeldata,bymoldingequipmentmadeintheformofmaterialaccumulationtechnologyofphysicalmodel.By3Dprintersthepartsprocessinghasamolding,cleantheadvantagesofnochip,butthedrawbackislowintensity,lowspeed,lowaccuracyandthecostistoohigh.,Whatisa3Dprinting?,Definitionof3Dprinting,Thetechnologyoflaserrapidprototypingcommonlyknownas3Dprinting.Itisakindofgetridoftraditionalcuttingtool,fixtureandmachinetoolprocessing,whichaccordingtothepartsoronlyobjectsofCAD3Dmodeldata,bymoldingequipmentmadeintheformofmaterialaccumulationtechnologyofphysicalmodel.By3Dprintersthepartsprocessinghasamolding,cleantheadvantagesofnochip,butthedrawbackislowintensity,lowspeed,lowaccuracyandthecostistoohighandsoon.,Principleof3Dprinting,3Dprintingandlasermoldingtechnology,usingthesuperpositionofprocessing,tocompletethemold3dentitytoprint.Eachlayeroftheprintingprocessintwosteps,firstofallinneedofmoldingareasprayedwithalayerofspecialglue,gluedropletitselfisverysmall,andnoteasytospread.Andthenalayerofpowderspraying,powdermetquicklycuringadhesiveglue,andnogluearearemainloosestate.Thisunderalayerofalayerofgluepowderalternation,entitymodelwillbeprint,aftertheprintaslongasremovingloosepowdercanbeplanemodel,andtherestofthepowdercanberecycled.,Principleof3Dprinting,Themacro3Dprinting,Micro/nanograde3DprintingTwo-photonpolymerization(2pp),Micro/nanograde3DprintingEyeofaneedle,Micro/nanograde3DprintingThisisahair,Micro/nanograde3DprintingTheheadofants,Applicationof3Dprintingtechnology,Thetechnologyhasbeenwidelyusedinmanyfields,suchasjewelry,footwear,industrialdesign,architecture,engineeringandconstruction(AEC),automotive,aerospace,dentalandmedicalindustry,education,geographicinformationsystems,civilengineering,gunsandotherfields.,Thelaser3Dprintingmedicalcomponentinstance,ActualReseachTopicsVariousMaterial:BioresorbableBoneimplantscompositematerial,3Dbicycle,Thevaseof3Dprinting,Arobotprintedoutbyastudenttotakecareoftheelder,Letsgoandlearnsomethingaboutgraphene,Graphene-TheTwo-DimensionalNanomaterial,Asinglelayerthickness0.34nm,Consistingofasinglelayerofcarbonatomsarrangedtightlytwo-dimensionalcellularstructure,thebasicunitofbuildingothercarbonaceousmaterials.,Graphene-TheTwo-DimensionalNanomaterial,Theexcellentpropertiesofgraphene,Mechanicalproperties:Youngsmodulus：1100GpaStrength:125GpaElongation:25%Electricalproperties:Electronmobility：200000cm2/(vs)Conductivity:108(sm-1)Surfaceresistance:30/sqOpticalpropertiesLighttransmittance：97.7%Opticalproperties:Thermalconductivity：5000w/(mk)Thermalproperties:,KostyaNovoselov,AndreGeim,InOctober5,2010,TheygetNobelprizeinphysicsbyfoundingthegraphene.,Goodpotentialapplicationofgraphene,Letsgoandlearnsomethingaboutlaserinteractionwithgraphene,Graphenepreparationmethod,micromechanicalcleavage;机械剥离法：质量高、微尺度、产率低chemicalreductionofexfoliatedgrapheneoxide;氧化石墨还原法：批量、掺杂改性chemicalvapordeposition(CVD)化学气相沉积法：质量较高、面积较大Basalpyrolysismethod基底高温热解法：质量高、温度高、层数难控,micromechanicalcleavage,chemicalreductionofexfoliatedgrapheneoxide,Basalpyrolysismethod,chemicalvapordeposition(CVD),laser+graphene,Couldthelaserbegrowngrapheneinfreespace?,WEfoucusonlaserinteractionwithgraphene:1.Tofabricatelargearea,patternedandhighqualitygoraphene;2.Toimprove