I ka Crystallography, ua kapa ʻia ka hale daimana ka hale aniani cubic diamona, i hana ʻia e ka hoʻopili covalent o nā ʻĀtoma carbon. ʻO ka hapa nui o nā waiwai nui loa o ka daimana ka hopena pololei o ka ikaika paʻa paʻa sp³ covalent e hana ana i kahi hanana ʻoʻoleʻa a me kahi helu liʻiliʻi o nā ʻāpana carbon. Lawe ʻo Metal i ka wela ma o nā electrons manuahi, a pili ka conductivity mehana kiʻekiʻe me ka conductivity uila kiʻekiʻe. I ka hoʻohālikelike ʻana, hoʻopau wale ʻia ka conduction wela ma ke daimana e nā haʻalulu lattice (ie, phonons). ʻO nā paʻa covalent ikaika loa ma waena o nā atoms daimana e hana i ka lattice aniani kiki i kahi pinepine haʻalulu nui, no laila ʻo kona ʻano Debye ʻano like me 2,220 K.

 

      No ka mea ʻoi aku ka haʻahaʻa o ka hapa nui o nā noi ma mua o ka mahana o Debye, heʻuʻuku ka hoʻopuehu ʻana phonon, no laila ʻo ka pale conduction wela me ka phonon ʻoiai he liʻiliʻi ka medium. Akā e hana ka hemahema ma ka lattice i ka hoʻopuehu ʻana phonon, a laila e hoʻēmi nei i ka conductivity thermal, kahi ʻano kūlohelohe o nā pono aniani a pau. Hoʻopili pinepine nā kīnā i ka daimana i nā kīnā kiko e like me nā isotopes heavC kaumaha, nā haumia hauʻona a me nā hakahaka, nā kīnā kīnā ʻia e like me ka hoʻopili ʻana i nā hewa a me nā dislocations, a me nā hemahema 2D e like me nā palena palaoa.

 

      ʻO ke aniani daimana he ʻano tetrahedral maʻamau, kahi e hiki ai i nā pālua lone ʻehā o nā ʻāpana kalapona ke hana i nā paʻa covalent, no laila ʻaʻohe uila uila, no laila ʻaʻole hiki i ka diamana ke alakaʻi i ka uila.

 

      Hoʻohui ʻia, hoʻopili ʻia nā ʻāpana kalapona i ke daimana e nā paʻa paʻa ʻehā. Ma muli o ka ikaika o ka paʻa CC ma ka daimana, komo nā electrons valence āpau i ka hoʻokumu ʻia ʻana o nā paʻa covalent, e hana ana i kahi aniani aniani e like me ka pyramid, no laila kiʻekiʻe ka paʻakikī o ka daimana a kiʻekiʻe ke kiko hoʻoheheʻe. A ʻo kēia ʻano o ke daimana ka mea e omo ai i nā kaola kukui liʻiliʻi, ʻo ka hapa nui o nā kukui i hoʻoheheʻe ʻia i ka daimana e hōʻike ʻia, no laila ʻoiai paʻakikī loa ia, nānā ka aniani.

 

      I kēia manawa, ʻoi aku ka nui o nā mea dissipation wela i makemake nui ʻia o ka ʻohana material nano-carbon, me nanodiamond, nano-graphene, flakes graphene, pulupulu nano-graphite paukū, a me nā nanotubes kalapona. Eia nō naʻe, ʻoi aku ka mānoanoa o nā huahana kiʻi ʻoniʻoni hoʻoweliweli wela a me ka haʻahaʻa o ka conductivity, a he paʻakikī e hoʻokō i nā pono dissipation wela o nā mana kiʻekiʻe, nā pono hoʻohui kiʻekiʻe. I ka manawa like, ʻaʻole ia e hoʻokō i nā koina hana kiʻekiʻe a ka poʻe no ka ultra-light a me ka lahilahi, a me ke ola o nā puʻupuʻu lōʻihi. No laila, he mea nui e ʻike i nā mea conductive super-thermal hou. Pono kēia i nā mea e loaʻa i kahi haʻahaʻa haʻahaʻa hoʻonui haʻahaʻa haʻahaʻa, conductivity ʻoi loa-kiʻekiʻe, a me nā māmā. ʻO nā mea kalepona e like me ke daimana a me ka graphene e hoʻokō wale i nā koina. He kiʻekiʻe conductivity mehana lākou. ʻO kā lākou mau mea hui pū kekahi ʻano o ka conduction wela a me nā mea hoʻoliʻiliʻi wela me ka hiki ke noi ʻia nui, a ua lilo lākou i mea nui i ka nānā.

 

      Inā makemake ʻoe e ʻike hou aʻe e pili ana i kā mākou nanodiamonds, ʻoluʻolu e kāhea i kā mākou limahana.

 


Ka manawa hope: Mei-10-2021