Grafite dị elu nwere ike ọrụ dị mma, nkwụsi ike nke okpomọkụ, mgbanwe dị elu na oke ikuku ikuku na ọkụ eletrik, na-eme ka ọ bụrụ otu n'ime ihe ndị kachasị mkpa maka ọtụtụ ngwa dị ka ndị na-eduzi photothermal ejiri dị ka batrị na ekwentị. Dịka ọmụmaatụ, ụdị eserese pụrụ iche, nke pyrolytic graphite (HOPG) nyere iwu nke ukwuu, bụ otu n'ime ihe a na-ejikarị eme ihe na ụlọ nyocha. Ihe onwunwe. Njirimara ndị a magburu onwe ya bụ n'ihi nhazi nke graphite, ebe njikọ siri ike dị n'etiti carbon carbon na graphene n'ígwé na-enye aka na-arụ ọrụ nke ọma, ọkụ na ọkụ eletrik, ebe ọ bụ na obere mmekọrịta dị n'etiti graphene n'ígwé. Omume ahụ na-ebute mgbanwe dị elu. eserese. Ọ bụ ezie na achọpụtara graphite n'okike ihe karịrị 1000 afọ na a na-amụkwa njikọ aka ya kemgbe ihe karịrị 100 afọ, àgwà nke graphite samples, ma eke na sịntetik, adịghị mma. Dịka ọmụmaatụ, ogo ngalaba graphite kachasị ukwuu na ihe ndị graphite na-abụkarị ihe na-erughị 1 mm, nke dị nnọọ iche na nha nke ọtụtụ kristal dị ka quartz single crystals na silicon single crystals. Nha nwere ike iru nha nke otu mita. Obere obere graphite otu kristal bụ n'ihi adịghị ike mmekọrịta dị n'etiti graphite layers, na flatness nke graphene oyi akwa siri ike ịnọgide na-enwe n'oge uto, ya mere graphite na-adị mfe agbajikwa n'ime ọtụtụ otu-kristal ọka ókè na ọgba aghara. . Iji dozie isi nsogbu a, Prọfesọ Emeritus nke Ulsan National Institute of Science and Technology (UNIST) na ndị ọrụ ya bụ Prof. Liu Kaihui, Prof. Wang Enge nke Mahadum Peking, na ndị ọzọ atụpụtawo atụmatụ maka ịmepụta usoro dị mkpa nke ukwuu. graphite otu kristal. ihe nkiri, gbadata n'ọnụọgụ inch. Usoro ha na-eji otu nickel foil otu-crystal dị ka mkpụrụ, na atom carbon na-eri nri site na azụ nke nickel foil site na "usoro mgbasa ozi-isothermal dissolution-diffusion-deposition". Kama iji isi iyi kaadiboodu gaseous, ha họọrọ maka ihe carbon siri ike iji kwado uto graphite. Atụmatụ ọhụrụ a na-eme ka o kwe omume imepụta fim graphite otu kristal nwere ọkpụrụkpụ nke ihe dịka inch 1 na 35 microns, ma ọ bụ karịa 100,000 graphene layer n'ime ụbọchị ole na ole. E jiri ya tụnyere ihe nlele graphite niile dị, otu-kristal graphite nwere conductivity thermal nke ~ 2880 W m-1K-1, ọdịnaya na-adịghị mkpa nke adịghị ọcha, yana opekempe anya n'etiti ọkwa. (1) Njikọ na-aga nke ọma nke ihe nkiri nickel otu-kristal nke nnukwu nha dị ka ihe ndị na-egbuke egbuke na-ezere imebi graphite sịntetik; (2) 100,000 n'ígwé nke graphene na-eto isothermally n'ime ihe dị ka 100 awa, nke mere na onye ọ bụla oyi akwa nke graphene na-synthesized na otu kemịkalụ gburugburu ebe obibi na okpomọkụ, nke ana achi achi na edo àgwà nke graphite; (3) Carbon na-aga n'ihu na-aga n'ihu site n'akụkụ azụ nke nickel foil na-enye ohere ka ọkwa nke graphene na-eto eto n'ogo dị elu, ihe dịka otu oyi akwa kwa sekọnd ise, "
Oge nzipu: Nov-09-2022