Graphene yatozivikanwa nekusimba kwayo kukuru, kunyangwe iine ukobvu hweatomu imwe chete. Saka ingasimbiswa sei zvakanyanya? Nekuishandura kuita mapepa edhaimani, hongu. Vaongorori vekuSouth Korea ikozvino vakagadzira nzira itsva yekushandura graphene kuita mafirimu edhaimani akatetepa, pasina kushandisa simba rakawanda.
Graphene, graphite nedhaimani zvese zvakagadzirwa nezvinhu zvakafanana - kabhoni - asi musiyano uripo pakati pezvinhu izvi ndewekuti maatomu ekabhoni anorongwa sei uye anobatanidzwa sei pamwe chete. Graphene ipepa rekabhoni rine ukobvu hweatomu imwe chete, rine zvisungo zvakasimba pakati pawo zvakatwasuka. Graphite inoumbwa nemapepa egraphene akaunganidzwa pamusoro peumwe neumwe, ane zvisungo zvakasimba mukati mepepa rega rega asi asina kusimba anobatanidza mapepa akasiyana. Uye mudhaimani, maatomu ekabhoni akabatana zvakasimba muzvikamu zvitatu, zvichigadzira chinhu chakaoma zvikuru.
Kana zvisungo zviri pakati pezvidimbu zvegraphene zvasimbiswa, zvinogona kuva 2D form yedhaimani inozivikanwa se diamond. Dambudziko nderekuti, izvi hazviwanzo kuve nyore kuzviita. Imwe nzira inoda kumanikidzwa kwakanyanya, uye kana kumanikidzwa ikoko kwangobviswa, zvinhu zvinodzokera ku graphene. Dzimwe ongororo dzakawedzera maatomu ehydrogen kugraphene, asi izvozvo zvinoita kuti zviome kudzora zvisungo.
Pachidzidzo chitsva ichi, vaongorori veInstitute for Basic Science (IBS) neUlsan National Institute of Science and Technology (UNIST) vakachinjana hydrogen nefluorine. Pfungwa yacho ndeyekuti nekuisa fluorine mu graphene ine bilayer, zvinobatanidza zvikamu zviviri izvi, zvichigadzira hukama hwakasimba pakati pazvo.
Chikwata chakatanga nekugadzira bilayer graphene vachishandisa nzira yakaedzwa uye yechokwadi ye chemical vapor deposition (CVD), pane substrate yakagadzirwa ne copper ne nickel. Zvadaro, vakaisa graphene muutsi hwe xenon difluoride. Fluorine iri mumusanganiswa iwoyo inonamira kumaatomu ekabhoni, ichisimbisa zvisungo pakati pe graphene layers uye ichigadzira layer yakatetepa ye fluorinated diamond, inozivikanwa se F-diamane.
Maitiro matsva aya ari nyore kupfuura mamwe, izvo zvinofanira kuita kuti zvive nyore kuwedzera. Machira matete edhaimani anogona kugadzira zvikamu zvemagetsi zvakasimba, zvidiki uye zvinochinjika, kunyanya se semi-conductor ine gap yakakura.
"Nzira iyi iri nyore ye fluorination inoshanda patembiricha iri pedyo nekamuri uye pasi pekumanikidzwa kwakaderera pasina kushandisa plasma kana chero nzira dzekushandisa gasi, nokudaro inoderedza mukana wekugadzira zvikanganiso," anodaro Pavel V. Bakharev, munyori wekutanga wechidzidzo ichi.
Nguva yekutumira: Kubvumbi-24-2020