1, nzira yekubvisa michina
Mechanical stripping method inzira yekuwana graphene nhete-layer zvinhu uchishandisa friction uye hukama pakati pezvinhu negraphene. Iyo nzira iri nyore kushanda, uye iyo inowanikwa graphene inowanzo chengetedza yakazara crystal chimiro. Muna 2004, masayendisiti maviri ekuBritain akashandisa tepi inoonekera kuti abvise yakasikwa graphite layer ne layer kuti iwane graphene, iyo yakarongedzerwa semuchina wekubvisa nzira. Iyi nzira yaimboonekwa seisina basa uye haigone kugadzirwa kwakawanda.
Mumakore achangopfuura, indasitiri iyi yakaita tsvakiridzo yakawanda uye kuvandudza hunyanzvi munzira dzekugadzira dzegraphene. Parizvino, makambani akati wandei muXiamen, Guangdong nemamwe mapurovhinzi nemaguta akakunda dambudziko rekugadzira remutengo wakaderera-hombe kugadzirira kwegraphene, vachishandisa michina yekubvisa nzira kugadzira mumaindasitiri kugadzira graphene ine mutengo wakaderera uye wemhando yepamusoro.
2. Redox nzira
Oxidation-reduction method ndeyekuita oxidize natural graphite nekushandisa makemikari reagents akadai sulfuric acid uye nitric acid uye oxidants akadai potassium permanganate uye hydrogen peroxide, kuwedzera nzvimbo pakati graphite layers, uye kuisa oxides pakati graphite layer kugadzirira GraphiteOxide. Zvadaro, reactant inoshambidzwa nemvura, uye iyo yakashambidzwa yakaoma inoomeswa pakupisa kwakadzika kugadzirira graphite oxide poda. Graphene oxide yakagadzirwa nekupeya graphite oxide poda nekupepeta kwemuviri uye nekuwedzera tembiricha. Pakupedzisira, graphene oxide yakaderedzwa nemakemikari nzira yekuwana graphene (RGO). Iyi nzira iri nyore kushanda, ine goho repamusoro, asi yakaderera chigadzirwa mhando [13]. Oxidation-reduction method inoshandisa maasidhi akasimba akadai sesulfuric acid uye nitric acid, iyo ine ngozi uye inoda mvura yakawanda pakuchenesa, izvo zvinounza kusvibiswa kukuru kwezvakatipoteredza.
Graphene yakagadzirirwa ne redox nzira ine akapfuma-ine-ine okisijeni inoshanda mapoka uye iri nyore kugadzirisa. Nekudaro, pakudzikisa graphene oxide, zvakaoma kudzora okisijeni yemukati megraphene mushure mekuderedzwa, uye graphene oxide icharamba ichideredzwa pasi pesimba rezuva, tembiricha yepamusoro mungoro uye zvimwe zvinhu zvekunze, saka mhando yezvigadzirwa zvegraphene. inogadzirwa ne redox nzira inowanzosaenderana kubva pabatch kuenda kune batch, izvo zvinoita kuti zviome kudzora kunaka.
Parizvino, vanhu vazhinji vanovhiringidza pfungwa dze graphite oxide, graphene oxide uye yakaderedzwa graphene oxide. Graphite oxide ine brown uye i polymer ye graphite uye oxide. Graphene oxide chigadzirwa chinowanikwa nekusvuura graphite oxide kune imwechete layer, kaviri layer kana oligo layer, uye ine huwandu hukuru hwemapoka ane oxygen, saka graphene oxide haina-conductive uye ine inoshanda zvinhu, izvo zvinoramba zvichideredza. uye kusunungura magasi akadai sesarufa dioxide panguva yekushandiswa, kunyanya panguva yekupisa-kupisa kwezvinhu. Chigadzirwa mushure mekudzikisa graphene oxide inogona kunzi graphene (yakaderedzwa graphene oxide).
3. (silicon carbide) SiC epitaxial nzira
SiC epitaxial nzira ndeyekudzikisa maatomu esilicon kure nezvinhu uye kuvakazve maatomu eC asara nekuzvibatanidza mune yekupedzisira-yakakwirira vacuum uye yakakwirira tembiricha nharaunda, nekudaro kuwana graphene yakavakirwa paSiC substrate. High-quality graphene inogona kuwanikwa nenzira iyi, asi nzira iyi inoda michina yakakwirira.
Nguva yekutumira: Jan-25-2021