Graphene isanzwe izwiho gukomera cyane, nubwo ifite ubunini bwa atome imwe gusa. None se yarushaho gukomera gute? Mu kuyihinduramo impapuro za diyama, birumvikana. Abashakashatsi bo muri Koreya y'Epfo ubu bateguye uburyo bushya bwo guhindura graphene ikaba filime za diyama nto cyane, bitabaye ngombwa ko ikoresha umuvuduko mwinshi.
Graphene, grafiti na diyama byose bikozwe mu bintu bimwe - karuboni - ariko itandukaniro riri hagati y'ibi bikoresho ni uburyo atome za karuboni zitondekwa kandi zigahuzwa hamwe. Graphene ni urupapuro rwa karuboni rufite ubunini bwa atome imwe gusa, rufite imigozi ikomeye hagati yarwo itambitse. Grafiti igizwe n'impapuro za graphene zifatanye hejuru y'izindi, zifite imigozi ikomeye muri buri rupapuro ariko izidakomeye zihuza impapuro zitandukanye. Kandi muri diyama, atome za karuboni zifatanye cyane mu buryo butatu, bigatuma habaho ibikoresho bikomeye cyane.
Iyo imigozi iri hagati y’ibice bya graphene ikomeje gukomera, ishobora guhinduka diyama ya 2D izwi nka diyama. Ikibazo ni uko ibi bisanzwe bitoroshye kubikora. Uburyo bumwe busaba umuvuduko mwinshi cyane, kandi iyo umuvuduko ukuweho, ibintu bisubira muri graphene. Ubundi bushakashatsi bwongeyeho atome za hydrogen kuri graphene, ariko ibyo bituma bigorana kugenzura imigozi.
Ku bw'ubushakashatsi bushya, abashakashatsi bo mu Kigo cy’Ubumenyi bw’Ibanze (IBS) n’Ikigo cy’Igihugu cy’Ubumenyi n’Ikoranabuhanga cya Ulsan (UNIST) bahinduye hydrogene bakayishyira kuri fluorine. Igitekerezo ni uko iyo graphene ya bilayer ishyizwe kuri fluorine, bituma ibice byombi birushaho kwegerana, bigatuma habaho imikoranire ikomeye hagati yabyo.
Itsinda ryatangiye rikora graphene y’ibice bibiri bakoresheje uburyo bwakoreshejwe mu gushyiraho umwuka wa chemical (CVD), ku kintu cyakozwe mu muringa na nikeli. Hanyuma, bashyize graphene ku mwuka wa xenon difluoride. Fluorine iri muri urwo ruvange ifata kuri atome za karuboni, ikomeza imikoranire hagati y’ibice bya graphene kandi ikora urwego rworoshye cyane rwa diyama ifite fluorine, ruzwi nka F-diamane.
Uburyo bushya bworoshye cyane kurusha ubundi, ibyo bikaba byagombye gutuma bworoha kubwiyongera. Impapuro nto cyane za diyama zishobora gutuma ibice bikomeye, bito kandi byoroshye byoroha, cyane cyane nk'icyuma gifata intera nini.
“Ubu buryo bworoshye bwo gupima fluorination bukora ku bushyuhe buri hafi y’icyumba no ku muvuduko muke hatabayeho gukoresha plasma cyangwa uburyo ubwo aribwo bwose bwo gukoresha gazi, bityo bigabanya amahirwe yo kubyara inenge,” ibi ni ibyavuzwe na Pavel V. Bakharev, umwanditsi wa mbere w’ubushakashatsi.
Igihe cyo kohereza: 24 Mata-2020