Kuziziritsa zida zamagetsi zamphamvu mu mafoni aposachedwa kungakhale vuto lalikulu. Ofufuza a King Abdullah University of Science and Technology apanga njira yofulumira komanso yabwino yopangira zida za kaboni zoyenera kutayira kutentha kuchokera ku zida zamagetsi. Zinthu zosunthikazi zitha kupeza ntchito zina, kuchokera ku masensa a gasi kupita ku mapanelo adzuwa.
Zida zambiri zamagetsi zimagwiritsa ntchito mafilimu a graphite poyendetsa ndi kutaya kutentha kopangidwa ndi zipangizo zamagetsi. Ngakhale graphite ndi mtundu wachilengedwe wa kaboni, kasamalidwe ka matenthedwe mumagetsi ndi ntchito yovuta ndipo nthawi zambiri imadalira kugwiritsa ntchito mafilimu apamwamba kwambiri a graphite a micron-thick. "Komabe, njira yopangira mafilimu a graphite pogwiritsa ntchito ma polima ngati zipangizo ndizovuta komanso zowonjezera mphamvu," akufotokoza Gitanjali Deokar, postdoc mu labu ya Pedro Costa yemwe adatsogolera ntchitoyi. Mafilimuwa amapangidwa kudzera mu njira zambiri zomwe zimafuna kutentha mpaka madigiri 3,200 Celsius ndipo sangathe kupanga mafilimu ochepa kwambiri kuposa ma microns ochepa.
Deokar, Costa ndi anzawo apanga njira yachangu komanso yopatsa mphamvu yopangira mapepala a graphite pafupifupi makulidwe a nanometer 100. Gululi linagwiritsa ntchito njira yotchedwa chemical vapor deposition (CVD) pokulitsa mafilimu a nanometer-thick graphite films (NGFs) pazithunzi za faifi, pomwe faifiyo imathandizira kusintha kwa methane yotentha kukhala graphite pamwamba pake. "Tinapeza NGF mu mphindi ya 5 ya kukula kwa CVD pa kutentha kwa 900 madigiri Celsius," adatero Deokar.
NGF imatha kukula kukhala mapepala mpaka 55 cm2 m'dera ndikukula mbali zonse za zojambulazo. Ikhoza kuchotsedwa ndikusamutsidwa kumalo ena popanda kufunikira kwa wosanjikiza wothandizira polima, zomwe ndizofunikira kwambiri pogwira ntchito ndi mafilimu amtundu umodzi wa graphene.
Pogwira ntchito ndi katswiri wa ma electron microscopy Alessandro Genovese, gululo linapeza zithunzi za transmission electron microscopy (TEM) za magawo a NGF pa faifi tambala. "Kuwona mawonekedwe pakati pa mafilimu a graphite ndi zojambula za nickel ndizopambana zomwe sizinachitikepo ndipo zidzapereka chidziwitso chowonjezera pa kukula kwa mafilimuwa," adatero Costa.
Kukula kwa NGF kumagwera pakati pa mafilimu a graphite a micron-thick graphite ndi single-layer graphene. "NGF imakwaniritsa mapepala a graphene ndi mafakitale a graphite, kuwonjezera pa nkhokwe ya mafilimu a carbon," adatero Costa. Mwachitsanzo, chifukwa cha kusinthasintha kwake, NGF ikhoza kugwiritsidwa ntchito poyang'anira kutentha kwa mafoni osinthika omwe tsopano akuyamba kuwonekera pamsika. "Poyerekeza ndi mafilimu a graphene, kuphatikiza kwa NGF kudzakhala kotsika mtengo komanso kokhazikika," anawonjezera.
Komabe, NGF ili ndi ntchito zambiri kuposa kutaya kutentha. Chosangalatsa chomwe chawonetsedwa muzithunzi za TEM ndikuti magawo ena a NGF ndi magawo ochepa a carbon. "Chodabwitsa n'chakuti, kukhalapo kwa zigawo zambiri za madera a graphene kumatsimikizira kuwala kokwanira kowoneka bwino mufilimu yonse," adatero Deoka. Gulu lofufuzira linanena kuti conductive, translucent NGF ingagwiritsidwe ntchito ngati chigawo cha maselo a dzuwa kapena ngati chinthu chodziwikiratu kuti azindikire mpweya wa nitrogen dioxide. "Tikukonzekera kuphatikizira NGF kukhala zida kuti ikhale ngati zinthu zambiri zogwira ntchito," adatero Costa.
Zambiri: Gitanjali Deokar et al., Kukula mwachangu kwa mafilimu a nanometer-thick graphite pazithunzi za nickel wafer-scale ndi kusanthula kwawo, Nanotechnology (2020). DOI: 10.1088/1361-6528/aba712
Ngati mukukumana ndi vuto, zolakwika, kapena mukufuna kutumiza pempho kuti musinthe zomwe zili patsambali, chonde gwiritsani ntchito fomuyi. Pamafunso ambiri, chonde gwiritsani ntchito fomu yathu yolumikizirana. Kuti mumve zambiri, gwiritsani ntchito gawo lomwe lili pansipa (tsatirani malangizowa).
Malingaliro anu ndi ofunika kwa ife. Komabe, chifukwa cha kuchuluka kwa mauthenga, sitingathe kutsimikizira kuyankha kwaumwini.
Imelo yanu imangogwiritsidwa ntchito kuuza olandira omwe adatumiza imeloyo. Adilesi yanu kapena adilesi ya wolandila sizigwiritsidwa ntchito pazifukwa zina zilizonse. Zomwe mumalemba ziziwoneka mu imelo yanu ndipo sizisungidwa ndi Phys.org mwanjira iliyonse.
Landirani zosintha za sabata ndi/kapena zatsiku ndi tsiku mubokosi lanu. Mutha kusiya kulembetsa nthawi iliyonse ndipo sitidzagawana zambiri ndi anthu ena.
Timapangitsa kuti zinthu zathu zizipezeka kwa aliyense. Ganizirani kuthandizira ntchito ya Science X ndi akaunti yoyamba.
Nthawi yotumiza: Sep-05-2024