Graphene inotozivikanwa nekuve yakasimba zvakanyanya, kunyangwe ichingova atomu imwe chete gobvu. Saka chingaitwa sei kuti chiwedzere kusimba? Nekuishandura kuita mapepa edhaimani, hongu. Vatsvagiri muSouth Korea parizvino vakagadzira nzira nyowani yekushandura graphene kuita iwo akaonda madhaimani mafirimu, pasina kushandisa yakanyanya kudzvanywa.
Graphene, graphite nedhaimani zvese zvinogadzirwa nezvinhu zvakafanana - kabhoni - asi mutsauko uripo pakati pezvishandiso izvi ndewekurongwa nekubatanidzwa kwemaatomu ecarbon. Graphene ishizha rekabhoni rinongori atomu imwe gobvu, rine zvisungo zvakasimba pakati pawo zvakachinjika. Graphite inogadzirwa negraphene sheets akaturikidzana pamusoro peimwe, ane mabhondi akasimba mukati mebepa rega rega asi asina kusimba anobatanidza mapepa akasiyana. Uye mudhaimondi, maatomu ekabhoni akabatana zvakanyanya mumativi matatu, achigadzira chinhu chakaoma zvakanyanya.
Kana zvisungo zviri pakati pezvikamu zvegraphene zvasimbiswa, zvinogona kuita 2D fomu yedhaimondi inozivikanwa se diamane. Dambudziko nderekuti, izvi kazhinji hazvisi nyore kuita. Imwe nzira inoda kudzvanyirirwa kwakanyanya, uye kana kudzvinyirirwa ikoko kwangobviswa zvinhu zvinodzokera mugraphene. Zvimwe zvidzidzo zvakawedzera maatomu ehydrogen kune graphene, asi izvo zvinoita kuti zviome kudzora zvisungo.
Pachidzidzo chitsva ichi, vaongorori veInstitute for Basic Science (IBS) neUlsan National Institute of Science and Technology (UNIST) vakachinjanisa hydrogen nefluorine. Pfungwa ndeyokuti nekufumura bilayer graphene kune fluorine, inounza zvidimbu zviviri pedyo, zvichigadzira zvisungo zvakasimba pakati pazvo.
Chikwata chakatanga nekugadzira bilayer graphene vachishandisa yakaedzwa-uye-yechokwadi nzira yemakemikari vapor deposition (CVD), pane substrate yakagadzirwa nemhangura uye nickel. Zvadaro, vakafumura graphene kumhute yexenon difluoride. Fluorine mumusanganiswa iwoyo inonamira kumaatomu ecarbon, inosimbisa zvisungo pakati pegraphene layer uye kugadzira ultrathin layer yefluorinated diamond, inozivikanwa seF-diamane.
Maitiro matsva ari kureruka kupfuura mamwe, izvo zvinofanirwa kuita kuti zvive nyore kukwira kumusoro. Ultrathin mapepa edhaimondi anogona kugadzira akasimba, madiki uye anochinja-chinja emagetsi echikamu, kunyanya seyakakura-gap semi-conductor.
"Iyi nzira yakapfava yefluorination inoshanda padyo nekamuri tembiricha uye pasi pekumanikidzwa kwakadzika pasina kushandisa plasma kana chero gasi activation michina, saka inoderedza mukana wekugadzira kukanganisa," anodaro Pavel V. Bakharev, munyori wekutanga wekudzidza.
Nguva yekutumira: Kubvumbi-24-2020