Graphene amadziwika kale kuti ndi wamphamvu kwambiri, ngakhale ndi atomu imodzi yokha. Ndiye angalimbitse bwanji mphamvu zake? Posandutsa izo kukhala mapepala a diamondi, ndithudi. Ofufuza ku South Korea tsopano apanga njira yatsopano yosinthira graphene kukhala mafilimu a diamondi woonda kwambiri, osagwiritsa ntchito kuthamanga kwambiri.
Graphene, graphite ndi diamondi zonse zimapangidwa ndi zinthu zofanana - carbon - koma kusiyana pakati pa zipangizozi ndi momwe ma atomu a carbon amapangidwira ndikugwirizanitsa pamodzi. Graphene ndi pepala la kaboni lomwe limangokhala atomu imodzi yokhuthala, yokhala ndi zomangira zolimba pakati pawo mopingasa. Graphite amapangidwa ndi mapepala a graphene ataunjikidwa pamwamba pa mzake, ndi zomangira zolimba mkati mwa pepala lililonse koma zofooka zomwe zimagwirizanitsa mapepala osiyanasiyana. Ndipo mu diamondi, maatomu a kaboni amalumikizana mwamphamvu kwambiri mumiyeso itatu, kupanga chinthu cholimba kwambiri.
Pamene zomangira pakati pa zigawo za graphene zalimbikitsidwa, zimatha kukhala mawonekedwe a 2D a diamondi omwe amadziwika kuti diamane. Vuto ndiloti, izi nthawi zambiri zimakhala zovuta kuchita. Njira imodzi imafunikira kupanikizika kwambiri, ndipo mphamvuyo ikangochotsedwa zinthuzo zimabwereranso ku graphene. Maphunziro ena awonjezera maatomu a haidrojeni ku graphene, koma izi zimapangitsa kuti zikhale zovuta kuwongolera zomangira.
Pa kafukufuku watsopanoyu, ofufuza a Institute for Basic Science (IBS) ndi Ulsan National Institute of Science and Technology (UNIST) anasinthana ndi hydrogen kuti apange fluorine. Lingaliro ndiloti powonetsa bilayer graphene ku fluorine, imabweretsa zigawo ziwirizo kuyandikana, ndikupanga mgwirizano wamphamvu pakati pawo.
Gululi lidayamba popanga bilayer graphene pogwiritsa ntchito njira yoyeserera komanso yowona ya chemical vapor deposition (CVD), pagawo laling'ono lopangidwa ndi mkuwa ndi faifi tambala. Kenako, adawulula graphene ku nthunzi ya xenon difluoride. Fluorine mu kusakaniza kumeneku kumamatira ku maatomu a carbon, kulimbitsa mgwirizano pakati pa zigawo za graphene ndikupanga ultrathin wosanjikiza wa diamondi ya fluorinated, yotchedwa F-diamane.
Njira yatsopanoyi ndiyosavuta kwambiri kuposa ina, yomwe iyenera kupangitsa kuti ikhale yosavuta kukulitsa. Mapepala a Ultrathin a diamondi amatha kupanga zida zamphamvu, zing'onozing'ono komanso zosinthika kwambiri, makamaka ngati chowongolera chopanda malire.
"Njira yosavuta iyi ya fluorination imagwira ntchito pafupi ndi kutentha kwa chipinda komanso pansi pa kupanikizika kochepa popanda kugwiritsa ntchito plasma kapena njira iliyonse yogwiritsira ntchito mpweya, motero imachepetsa kuthekera kwa kupanga zolakwika," anatero Pavel V. Bakharev, wolemba woyamba wa phunziroli.
Nthawi yotumiza: Apr-24-2020