Ukupholisa ama-elekthronikhi anamandla kuma-Smartphones wakamuva kungaba inselelo enkulu. Abaphenyi eKing Abdullah University of Science futhi ubuchwepheshe bathuthukise indlela esheshayo futhi ephumelelayo yokwakha izinto zekhabhoni ekahle ukuqeda ukushisa kumadivayisi we-elekthronikhi. Lokhu okubonakalayo okuguquguqukayo kungathola ezinye izinhlelo zokusebenza, ezivela ezinzwa zegesi kumaphaneli elanga.
Amadivaysi amaningi we-elekthronikhi asebenzisa amafilimu we-graphite ukuze aqhube futhi anciphise ukushisa okwenziwe yizinto ezenziwe nge-elekthronikhi. Yize i-graphite iyindlela yemvelo yekhabhoni, ukuphathwa kwe-thermal in electronics kuyinto isicelo esifunwayo futhi kuvame ukuncike ekusetshenzisweni kwamafilimu aphezulu we-micron-micro-graphite. "Kodwa-ke, indlela yokwenza la mafilimu we-graphite asebenzisa ama-polymers njengoba izinto ezingavuthiwe ziyinkimbinkimbi futhi zinamandla," kuchaza uGitanjali Deokar, i-postdoc ePedro Costa acta's Lab eholele lo msebenzi. Amafilimu enziwa ngenqubo yezinyathelo eziningi edinga amazinga okushisa afinyelela kuma-3,200 degrees Celsius futhi awakwazi ukukhiqiza amafilimu anciphile ukwedlula ama-microns ambalwa.
UDeokar, Costa kanye nozakwabo babo bathuthukise indlela esheshayo futhi esebenza kahle yokwenza amashidi we-graphite cishe ama-nanometers ayi-100 aminyene. Iqembu lasebenzisa inqubo ebizwa nge-Chemical Vapor Deposition (CVD) ukukhulisa amafilimu we-nanometer-graphite (ngfs) ku-nickel foil, lapho i-nickel isebenzisa ukuguqulwa kwe-methane eshisayo ebusweni bayo. "Sizuze i-NGF ngesinyathelo nje sokukhula se-CVD semizuzu engu-5 endaweni yokushisa engama-900 degrees Celsius," kusho uDekar.
I-NGF ingakhula ibe ngamashidi kuze kufike ku-55 cm2 endaweni futhi ikhule nhlangothi zombili ze-foil. Ingasuswa futhi idluliselwe kwezinye izindawo ngaphandle kwesidingo sesendlalelo sokusekelwa kwe-polymer, okuyisidingo esivamile lapho sisebenza ngamafilimu we-graphe ener eyodwa.
Ukusebenza nge-elektroni Microscopy Isazi se-Alessandro Genovese, iqembu lathola izithombe zokuhambisa i-Electron MicroScopy (tem) yezimpawu zesiphambano ze-NGF kwi-nickel. "Ukugcina isikhombimsebenzisi esiphakathi kwamafilimu we-graphite kanye ne-nickel foil kuyinto efezekise ebekiwe futhi kuzonikeza ukuqonda okwengeziwe kwindlela yokukhula yalawa mafilimu," kusho uCosta.
Ubukhulu be-ngf buwela phakathi kwamafilimu we-graphite atholakalayo we-micron-graphite kanye ne-graphe yengqimba eyodwa. "I-NGF ifeza i-graphiene kanye namashidi we-graphite wezimboni, anezela kwi-arsenal yamafilimu abunjiwe ekhabhoni," kusho uCosta. Isibonelo, ngenxa yokuvumelana nezimo zayo, i-NGF ingasetshenziselwa ukuphathwa okushisayo ezingcingo eziguqukayo manje eziqala ukuvela emakethe. "Uma kuqhathaniswa namafilimu we-graphene, ukuhlanganiswa kwe-ngf kuzobe kushibhile futhi kuzinzile," engeza.
Kodwa-ke, i-NGF isebenzisa okuningi ngaphezu kokushibilika kokushisa. Isici esijabulisayo esiqokonyiswe ezithombeni ze-tem ukuthi ezinye izingxenye ze-NGF ziyizingqimba ezimbalwa nje zekhabhoni. "Ngokumangazayo, ukuba khona kwezendlalelo eziningi zezizinda ze-graphene ziqinisekisa izinga elinele lokukhanya okubonakalayo okubonakalayo kuyo yonke ifilimu," kusho uDeoka. Iqembu lokucwaninga lizimisele ukuthi i-ngf esebenzayo, i-ngf eguqukayo ingahle isetshenziswe njengengxenye yamangqamuzana elanga noma njengento ezwakalayo yokuthola i-nitrogen dioxide gesi. "Sihlela ukuhlanganisa i-NGF kumadivayisi ukuze sikwazi ukwenza njengento esebenzayo esebenzayo," kusho uCosta.
Imininingwane engaphezulu: Gitanjali Deokar et al. Doi: 10.1088 / 1361-6528 / Aba712
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Isikhathi sePosi: Sep-05-2024