Ua ʻike mua ʻia ʻo Graphene no kona ikaika loa, ʻoiai hoʻokahi wale nō ʻātoma ka mānoanoa. No laila pehea e hiki ai ke hoʻoikaika hou ʻia? Ma ka hoʻolilo ʻana iā ia i mau ʻāpana daimana, ʻoiaʻiʻo. Ua hoʻomohala nā kānaka noiʻi ma Kōlea Hema i kahi ʻano hana hou no ka hoʻololi ʻana i ka graphene i nā ʻili daimana lahilahi loa, me ka ʻole o ka hoʻohana ʻana i ke kaomi kiʻekiʻe.
Hana ʻia ʻo Graphene, graphite a me ke daimana i nā mea like - kalapona - akā ʻo ka ʻokoʻa ma waena o kēia mau mea, ʻo ia ke ʻano o ka hoʻonohonoho ʻana a me ka hoʻopaʻa ʻana o nā ʻātoma kalapona. ʻO Graphene kahi pepa kalapona he hoʻokahi wale nō ʻātoma ka mānoanoa, me nā pilina ikaika ma waena o lākou ma ke ʻano ākea. Hana ʻia ʻo Graphite me nā pepa graphene i hoʻopaʻa ʻia ma luna o kekahi, me nā pilina ikaika i loko o kēlā me kēia pepa akā nāwaliwali nā mea e hoʻopili ana i nā pepa like ʻole. A i loko o ke daimana, ʻoi aku ka ikaika o ka hoʻopili ʻia ʻana o nā ʻātoma kalapona ma nā ana ʻekolu, e hana ana i kahi mea paʻakikī loa.
Ke hoʻoikaika ʻia nā pilina ma waena o nā papa o ka graphene, hiki iā ia ke lilo i ʻano 2D o ka daimana i ʻike ʻia ʻo diamane. ʻO ka pilikia, ʻaʻole maʻalahi kēia e hana. Pono kekahi ala i nā kaomi kiʻekiʻe loa, a i ka wā e wehe ʻia ai kēlā kaomi e hoʻi hou ka mea i graphene. Ua hoʻohui nā haʻawina ʻē aʻe i nā ʻātoma hydrogen i ka graphene, akā ʻo ia ka mea e paʻakikī ai ke kāohi i nā pilina.
No ke aʻo hou ʻana, ua hoʻololi nā kānaka noiʻi ma ka Institute for Basic Science (IBS) a me ka Ulsan National Institute of Science and Technology (UNIST) i ka hydrogen no ka fluorine. ʻO ka manaʻo, ma ka hōʻike ʻana i ka graphene bilayer i ka fluorine, e hoʻokokoke mai ia i nā papa ʻelua, e hana ana i nā pilina ikaika ma waena o lākou.
Ua hoʻomaka ka hui ma ka hana ʻana i ka graphene bilayer me ka hoʻohana ʻana i ke ʻano i hoʻāʻo ʻia a ʻoiaʻiʻo o ka hoʻokaʻawale ʻana o ka mahu kemika (CVD), ma luna o kahi substrate i hana ʻia me ke keleawe a me ka nickel. A laila, ua hōʻike lākou i ka graphene i nā mahu o ka xenon difluoride. Hoʻopili ka fluorine i loko o kēlā hui ʻana i nā ʻātoma kalapona, e hoʻoikaika ana i nā pilina ma waena o nā papa graphene a hana i kahi papa lahilahi loa o ka daimana fluorinated, i ʻike ʻia ʻo F-diamane.
ʻOi aku ka maʻalahi o ke kaʻina hana hou ma mua o nā mea ʻē aʻe, kahi e maʻalahi ai ka hoʻonui ʻana. Hiki i nā ʻāpana daimana lahilahi loa ke hana i nā ʻāpana uila ikaika, liʻiliʻi a ʻoi aku ka maʻalahi, ʻoiai he semi-conductor ākea.
"Hana kēia ʻano hana fluorination maʻalahi ma kahi kokoke i ka mahana o ka lumi a ma lalo o ke kaomi haʻahaʻa me ka ʻole o ka hoʻohana ʻana i ka plasma a i ʻole nā mea hana hoʻāla kinoea, no laila e hōʻemi ana i ka hiki ke hana i nā hemahema," wahi a Pavel V. Bakharev, ka mea kākau mua o ke aʻo ʻana.
Ka manawa hoʻouna: ʻApelila-24-2020