I-graphite esezingeni eliphezulu inamandla amahle kakhulu okusebenza, ukuzinza kokushisa, ukuguquguquka okuphezulu kanye nokuqhuba okuphezulu kakhulu kokushisa kanye nogesi ngaphakathi, okwenza kube ngenye yezinto ezibaluleke kakhulu ezithuthukisiwe zezinhlelo zokusebenza eziningi ezifana nabaqhubi be-photothermal abasetshenziswa njengamabhethri ocingweni. Isibonelo, uhlobo olukhethekile lwe-graphite, i-graphite ye-pyrolytic ehlelwe kahle (i-HOPG), ingenye yezindlela ezisetshenziswa kakhulu emalabhorethri. Izinto. Lezi zakhiwo ezinhle kakhulu zibangelwa isakhiwo se-graphite esinezingqimba, lapho izibopho eziqinile ze-covalent phakathi kwama-athomu e-carbon ezingqimbeni ze-graphene zinegalelo ezimpahleni ezinhle kakhulu zokusebenza, ukuqhuba kokushisa kanye nogesi, kuyilapho ukuxhumana okuncane kakhulu phakathi kwezingqimba ze-graphene. Isenzo siphumela ezingeni eliphezulu lokuguquguquka. i-graphite. Nakuba i-graphite itholakale emvelweni iminyaka engaphezu kwe-1000 futhi ukuhlanganiswa kwayo kokwenziwa sekufundwe iminyaka engaphezu kwe-100, ikhwalithi yamasampula e-graphite, kokubili emvelo kanye nokwenziwa, ayifanele neze. Isibonelo, usayizi wezindawo ezinkulu kakhulu ze-graphite ze-crystal eyodwa ezintweni ze-graphite ngokuvamile ungaphansi kwe-1 mm, okungafani kakhulu nosayizi wamakristalu amaningi njengekristalu elilodwa le-quartz kanye namakristalu elilodwa le-silicon. Usayizi ungafinyelela esikalini semitha. Usayizi omncane kakhulu we-single-crystal graphite ubangelwa ukusebenzisana okubuthakathaka phakathi kwezingqimba ze-graphite, futhi ukuthamba kwengqimba ye-graphene kunzima ukuyigcina ngesikhathi sokukhula, ngakho-ke i-graphite ihlukaniswa kalula ibe yimingcele eminingana yezinhlamvu ze-single-crystal engahlelekile. . Ukuze kuxazululwe le nkinga ebalulekile, uSolwazi Emeritus we-Ulsan National Institute of Science and Technology (UNIST) kanye nabalingani bakhe uSolwazi Liu Kaihui, uSolwazi Wang Enge wasePeking University, nabanye baphakamise isu lokuhlanganisa ifilimu ye-graphite single crystals encane, kuze kufike esikalini se-intshi. Indlela yabo isebenzisa i-single-crystal nickel foil njenge-substrate, futhi ama-athomu e-carbon adliswa ngemuva kwe-nickel foil ngenqubo "yokuhlakazeka kwe-isothermal dissolving-diffusion-deposition". Esikhundleni sokusebenzisa umthombo wekhadibhodi wegesi, bakhethe izinto eziqinile ze-carbon ukuze kube lula ukukhula kwe-graphite. Leli cebo elisha lenza kube nokwenzeka ukukhiqiza amafilimu e-graphite yekristalu eyodwa enobukhulu obungaba yi-intshi eli-1 nama-micron angu-35, noma izingqimba ze-graphene ezingaphezu kuka-100,000 ezinsukwini ezimbalwa. Uma kuqhathaniswa nazo zonke izibonelo ze-graphite ezitholakalayo, i-graphite yekristalu eyodwa inokushisa okuhambayo okungu-~2880 W m-1K-1, okuqukethwe okungabalulekile kokungcola, kanye nebanga elincane phakathi kwezingqimba. (1) Ukwenziwa ngempumelelo kwamafilimu e-nickel yekristalu eyodwa ngobukhulu obukhulu njengezingxenye eziphansi kakhulu kugwema ukuphazamiseka kwe-graphite yokwenziwa; (2) Izingqimba eziyi-100,000 ze-graphene zikhuliswa ngokwazo emahoreni angaba yi-100, ukuze ungqimba ngalunye lwe-graphene lwenziwe endaweni efanayo yamakhemikhali kanye nokushisa, okuqinisekisa ikhwalithi efanayo ye-graphite; (3) Ukunikezwa okuqhubekayo kwekhabhoni ohlangothini olungemuva lwe-nickel foil kuvumela izingqimba ze-graphene ukuthi zikhule njalo ngesivinini esikhulu kakhulu, cishe ungqimba olulodwa njalo ngemizuzwana emihlanu,”
Isikhathi sokuthunyelwe: Novemba-09-2022