Filimu yopyapyala kwambiri ya diamondi yopangidwa ndi graphene ikhoza kulimbitsa zamagetsi

Graphene imadziwika kale kuti ndi yolimba kwambiri, ngakhale kuti ndi yokhuthala ndi atomu imodzi yokha. Ndiye ingapangidwe bwanji kukhala yolimba kwambiri? Mwa kuisintha kukhala mapepala a diamondi, ndithudi. Ofufuza ku South Korea tsopano apanga njira yatsopano yosinthira graphene kukhala mafilimu a diamondi owonda kwambiri, popanda kugwiritsa ntchito mphamvu zambiri.

Graphene, graphite ndi diamondi zonse zimapangidwa ndi chinthu chimodzi - kaboni - koma kusiyana pakati pa zinthuzi ndi momwe maatomu a kaboni amakonzedwera ndikulumikizana pamodzi. Graphene ndi pepala la kaboni lomwe lili ndi atomu imodzi yokha yokhuthala, yokhala ndi maubwenzi amphamvu pakati pawo mopingasa. Graphite imapangidwa ndi mapepala a graphene omwe amaunikidwa pamwamba pa wina ndi mnzake, okhala ndi maubwenzi amphamvu mkati mwa pepala lililonse koma ofooka olumikiza mapepala osiyanasiyana. Ndipo mu diamondi, maatomu a kaboni amalumikizidwa mwamphamvu kwambiri m'magawo atatu, ndikupanga chinthu cholimba kwambiri.

Pamene maubwenzi pakati pa zigawo za graphene alimbikitsidwa, amatha kukhala mtundu wa 2D wa diamondi wotchedwa diamondi. Vuto ndilakuti, izi nthawi zambiri sizimakhala zosavuta kuchita. Njira imodzi imafuna kupanikizika kwakukulu, ndipo kupanikizikako kukangochotsedwa, zinthuzo zimabwereranso kukhala graphene. Kafukufuku wina wawonjezera maatomu a haidrojeni ku graphene, koma zimenezo zimapangitsa kuti zikhale zovuta kulamulira maubwenziwo.

Pa kafukufuku watsopanowu, ofufuza ku Institute for Basic Science (IBS) ndi Ulsan National Institute of Science and Technology (UNIST) adasinthana ndi hydrogen ndi fluorine. Lingaliro ndilakuti poyika graphene ya bilayer ku fluorine, imabweretsa zigawo ziwirizi pamodzi, ndikupanga mgwirizano wolimba pakati pawo.

Gululi linayamba kupanga graphene ya bilayer pogwiritsa ntchito njira yodziwika bwino yopangira chemical vapor deposition (CVD), pa substrate yopangidwa ndi mkuwa ndi nickel. Kenako, adayika graphene ku nthunzi ya xenon difluoride. Fluorine yomwe ili mu chisakanizocho imamatira ku maatomu a kaboni, kulimbitsa mgwirizano pakati pa zigawo za graphene ndikupanga wosanjikiza woonda kwambiri wa diamondi ya fluorinated, yotchedwa F-diamane.

Njira yatsopanoyi ndi yosavuta kwambiri kuposa ina, zomwe ziyenera kupangitsa kuti ikhale yosavuta kukulitsa. Mapepala opyapyala kwambiri a diamondi angapangitse kuti zikhale zolimba, zazing'ono komanso zosinthasintha zamagetsi, makamaka ngati semi-conductor yokhala ndi mipata yayikulu.

"Njira yosavuta iyi yopangira fluorination imagwira ntchito kutentha kwapafupi ndi chipinda komanso pansi pa kupanikizika kochepa popanda kugwiritsa ntchito plasma kapena njira zina zoyendetsera mpweya, motero imachepetsa kuthekera kopanga zolakwika," akutero Pavel V. Bakharev, wolemba woyamba wa kafukufukuyu.