Amara graphene maka ịdị ike nke ukwuu, n'agbanyeghị na ọ bụ naanị otu atọm. Ya mere, olee otú a ga-esi mee ka ọ dịkwuo ike? Site n'ịtụgharị ya n'ime mpempe akwụkwọ diamond, n'ezie. Ndị na-eme nchọpụta na South Korea ewepụtala usoro ọhụrụ maka ịtụgharị graphene ka ọ bụrụ ihe nkiri diamond kacha dị gịrịgịrị, na-enweghị iji nnukwu nrụgide.
Graphene, graphite na diamond bụ otu ihe ahụ - carbon - mana ọdịiche dị n'etiti ihe ndị a bụ ka esi hazie ma jikọta carbon carbon. Graphene bụ mpempe akwụkwọ carbon nke dị naanị otu atom gbara ọkpụrụkpụ, nwere njikọ siri ike n'etiti ha kwụ ọtọ. Graphite bụ mpempe akwụkwọ graphene ekpokọtara n'elu ibe ya, nwere njikọ siri ike n'ime mpempe akwụkwọ ọ bụla mana ndị na-adịghị ike na-ejikọta mpempe akwụkwọ dị iche iche. Na na diamond, carbon carbon nwere njikọ siri ike karịa n'akụkụ atọ, na-emepụta ihe siri ike na-enweghị atụ.
Mgbe a na-ewusi njikọ dị n'etiti akwa graphene ike, ọ nwere ike ịghọ ụdị 2D nke diamond mara dị ka diamane. Nsogbu bụ na nke a anaghị adị mfe ime. Otu ụzọ chọrọ nrụgide dị oke elu, ozugbo ewepụrụ nrụgide ahụ, ihe ahụ na-alaghachi azụ na graphene. Ọmụmụ ihe ndị ọzọ agbakwunyela atom hydrogen na graphene, mana nke ahụ na-eme ka o sie ike ịchịkwa nkekọ.
Maka ọmụmụ ihe ọhụrụ ahụ, ndị nchọpụta na Institute for Basic Science (IBS) na Ulsan National Institute of Science and Technology (UNIST) gbanwere hydrogen maka fluorine. Echiche bụ na site n'igosipụta bilayer graphene na fluorine, ọ na-eme ka okpukpu abụọ dịkwuo nso, na-emepụta njikọ siri ike n'etiti ha.
Otu a malitere site n'ịmepụta graphene bilayer site na iji usoro a nwalere na nke eziokwu nke ikuku vapor deposition (CVD), na mkpụrụ nke ejiri ọla kọpa na nickel mee. Mgbe ahụ, ha kpughere graphene na vapors nke xenon difluoride. Fluorine dị na ngwakọta ahụ na-arapara n'ahụ carbon carbon, na-ewusi njikọ dị n'etiti ọkwa graphene na ịmepụta ultrathin oyi akwa nke fluorinated diamond, nke a maara dị ka F-diamane.
Usoro ọhụrụ ahụ dị nnọọ mfe karịa ndị ọzọ, nke kwesịrị ime ka ọ dịtụ mfe ịbawanye elu. Ibé diamond Ultrathin nwere ike ime ka akụrụngwa eletrọnịkị dị ike, pere mpe yana na-agbanwe agbanwe, ọkachasị dị ka onye na-eduzi oghere sara mbara.
"Usoro fluorination a dị mfe na-arụ ọrụ na okpomọkụ dị nso na n'okpuru nrụgide dị ala n'ejighị plasma ma ọ bụ usoro ịgbanye gas ọ bụla, n'ihi ya na-ebelata ohere nke ịmepụta ntụpọ," ka Pavel V. Bakharev, onye mbụ dere akwụkwọ ahụ na-ekwu.
Oge nzipu: Eprel-24-2020