I-Graphene sele yaziwa ngokuba namandla kakhulu, nangona ityebile nje nge-atom enye. Ngoko ke ingenziwa njani ibe namandla ngakumbi? Ngokuyiguqula ibe ziishelu zedayimani, ewe. Abaphandi eMzantsi Korea ngoku baphuhlise indlela entsha yokuguqula i-graphene ibe ziifilimu zedayimani ezincinci, ngaphandle kokusebenzisa uxinzelelo oluphezulu.
I-Graphene, i-graphite kunye nedayimani zonke zenziwe ngezinto ezifanayo - ikhabhoni - kodwa umahluko phakathi kwezi zinto yindlela ezihlelwe kwaye zidityaniswe ngayo iiathom zekhabhoni. I-Graphene liphepha lekhabhoni elinobukhulu beathom enye, elinobudlelwane obuqinileyo phakathi kwazo ngokuthe tye. I-Graphite yenziwe ngamaphepha e-graphene abekwe phezu komnye nomnye, anezibopho eziqinileyo ngaphakathi kwephepha ngalinye kodwa abuthathaka adibanisa amaphepha ahlukeneyo. Kwaye kwidayimani, iiathom zekhabhoni zidibene ngamandla amakhulu kwiimilinganiselo ezintathu, zenza izinto eziqinileyo kakhulu.
Xa iibhondi phakathi kweengqimba zegraphene ziqiniswa, zinokuba yi-2D form yedayimani eyaziwa ngokuba yi-diamond. Ingxaki kukuba, oku akulula ukukwenza. Enye indlela ifuna uxinzelelo oluphezulu kakhulu, kwaye kwangoko nje ukuba olo xinzelelo lususwe, izinto zibuyela kwi-graphene. Ezinye izifundo zongeze ii-athomu ze-hydrogen kwi-graphene, kodwa oko kwenza kube nzima ukulawula iibhondi.
Kolu phando lutsha, abaphandi kwi-Institute for Basic Science (IBS) kunye ne-Ulsan National Institute of Science and Technology (UNIST) batshintshise i-hydrogen nge-fluorine. Ingcamango kukuba ngokubeka i-bilayer graphene kwi-fluorine, isondeza la maleko mabini, idala ulwalamano oluqinileyo phakathi kwawo.
Iqela laqala ngokwenza i-bilayer graphene besebenzisa indlela evavanyiweyo yokufumba umphunga wekhemikhali (CVD), kwi-substrate eyenziwe nge-copper kunye ne-nickel. Emva koko, batyhila i-graphene kumphunga we-xenon difluoride. I-fluorine ekuloo mxube inamathela kwiiathom zekhabhoni, iqinisa amakhonkco phakathi kwe-graphene layers kwaye idala umaleko omncinci kakhulu wedayimani ene-fluorinated, eyaziwa ngokuba yi-F-diamane.
Le nkqubo intsha ilula kakhulu kunezinye, nto leyo enokwenza kube lula ukuyikhulisa. Amaphepha edayimani abhityileyo kakhulu anokwenza izinto ze-elektroniki eziqinileyo, ezincinci neziguquguqukayo ngakumbi, ingakumbi njenge-semi-conductor enesithuba esibanzi.
“Le ndlela ilula yokukhupha i-fluorination isebenza kubushushu obukufutshane negumbi kwaye iphantsi koxinzelelo oluphantsi ngaphandle kokusebenzisa i-plasma okanye naziphi na iindlela zokuvula igesi, ngoko ke kunciphisa amathuba okudala iziphene,” utshilo uPavel V. Bakharev, umbhali wokuqala wolu phando.
Ixesha lokuthumela: Epreli-24-2020