I-graphene isivele yaziwa ngokuba namandla ngendlela emangalisayo, naphezu kokuba wugqinsi lwe-athomu eyodwa. Ngakho-ke ingenziwa kanjani ibe namandla nakakhulu? Ngokuyiphendula ibe amashidi edayimane, kunjalo. Abacwaningi baseNingizimu Korea manje sebesungule indlela entsha yokuguqula i-graphene ibe amafilimu edayimane mncane kakhulu, ngaphandle kokuthi basebenzise umfutho ophakeme.
Igraphene, igraphite nedayimane konke kwenziwa ngezinto ezifanayo - ikhabhoni - kodwa umehluko phakathi kwalezi zinto ukuthi ama-athomu ekhabhoni ahlelwa futhi ahlanganiswe kanjani ndawonye. I-graphene iyishidi lekhabhoni eliwugqinsi lwe-athomu eyodwa, elinezibopho eziqinile phakathi kwalo ngokuvundlile. I-graphite yenziwe ngamashidi e-graphene astakwe phezulu kwelinye, anamabhondi aqinile ngaphakathi kweshidi ngalinye kodwa abuthaka axhuma amashidi ahlukene. Futhi edayimaneni, ama-athomu ekhabhoni axhumene ngokuqinile kakhulu ezinhlangothini ezintathu, okwenza into eqinile ngendlela emangalisayo.
Lapho izibopho phakathi kwezendlalelo zegraphene ziqiniswa, zingaba uhlobo lwedayimane lwe-2D olwaziwa nge-diamane. Inkinga iwukuthi, lokhu ngokuvamile akulula ukukwenza. Enye indlela idinga izingcindezi eziphakeme kakhulu, futhi ngokushesha nje lapho leyo ngcindezi isisusiwe izinto zibuyela ku-graphene. Ezinye izifundo zengeze ama-athomu e-hydrogen ku-graphene, kodwa lokho kwenza kube nzima ukulawula izibopho.
Ocwaningweni olusha, abacwaningi e-Institute for Basic Science (IBS) kanye ne-Ulsan National Institute of Science and Technology (UNIST) bashintshanise i-hydrogen bafaka i-fluorine. Umqondo uwukuthi ngokudalula i-bilayer graphene ku-fluorine, kusondeza izendlalelo ezimbili ndawonye, kudala izibopho eziqinile phakathi kwazo.
Ithimba laqala ngokwakha i-bilayer graphene lisebenzisa indlela eyazama futhi-yeqiniso ye-chemical vapor deposition (CVD), ku-substrate eyenziwe ngethusi ne-nickel. Ngemva kwalokho, badalula i-graphene kumhwamuko we-xenon difluoride. I-fluorine kuleyo ngxube inamathela kuma-athomu ekhabhoni, iqinisa izibopho phakathi kwezingqimba ze-graphene futhi idale ungqimba oluncane lwedayimane elikhanyayo, olwaziwa nge-F-diamane.
Inqubo entsha ilula kakhulu kunezinye, okufanele yenze kube lula ukukhuphula. Amashidi edayimane e-Ultrathin angenza izingxenye ze-elekthronikhi eziqinile, ezincane nezivumelana nezimo, ikakhulukazi njenge-semi-conductor enegebe elibanzi.
"Le ndlela elula ye-fluorination isebenza ekushiseni kwegumbi eliseduze nangaphansi kwengcindezi ephansi ngaphandle kokusebenzisa i-plasma noma yiziphi izindlela zokuvula igesi, ngakho-ke inciphisa amathuba okudala amaphutha," kusho uPavel V. Bakharev, umbhali wokuqala wocwaningo.
Isikhathi sokuthumela: Apr-24-2020