Kutonhodza magetsi ane simba mumafoni ekupedzisira anogona kuve dambudziko guru. Vatsvagiri vepaKing Abdullah University yeSainzi neTekinoroji vakagadzira nzira inokurumidza uye inoshanda yekugadzira kabhoni zvinhu zvakanakira kudzima kupisa kubva kumidziyo yemagetsi. Izvi zvinhu zvakasiyana-siyana zvinogona kuwana mamwe maapplication, kubva kune gasi sensors kusvika kune solar panel.
Zvigadzirwa zvemagetsi zvakawanda zvinoshandisa magirafu mafirimu kuitisa uye kubvisa kupisa kunokonzerwa nemagetsi. Kunyangwe graphite iri yakasikwa fomu yekabhoni, kudziya kwekutonga mumagetsi ibasa rinoda uye rinowanzoenderana nekushandiswa kwemhando yepamusoro micron-gobvu graphite mafirimu. "Zvisinei, maitiro ekugadzira aya mafirimu egraphite achishandisa mapolymers semidziyo yakaoma uye anoshandisa simba," anotsanangura Gitanjali Deokar, postdoc murabhoritari yaPedro Costa akatungamira basa. Mafirimu anogadzirwa kuburikidza nematanho akawanda anoda tembiricha inosvika 3,200 madhigirii celsius uye haakwanise kuburitsa mafirimu akatetepa kupfuura mamicrons mashoma.
Deokar, Costa nevamwe vavo vakagadzira nzira inokurumidza uye inoshanda nesimba kugadzira mapepa egraphite akakora 100 nanometers. Chikwata chakashandisa nzira inonzi chemical vapor deposition (CVD) kurima nanometer-thick graphite films (NGFs) panickel foil, apo nickel inokonzeresa kushandurwa kwemethane inopisa kuita graphite pamusoro payo. "Takawana NGF mumaminetsi mashanu chete ekukura kweCVD padanho rekuita tembiricha ye900 degrees Celsius," akadaro Deokar.
NGF inogona kukura kuita mapepa anosvika 55 cm2 munzvimbo uye inokura pamativi ese efoiri. Inogona kubviswa uye kuendeswa kune dzimwe nzvimbo pasina kudiwa kwepolymer tsigiro layer, inova chinhu chinowanzoitika kana uchishanda ne single-layer graphene mafirimu.
Tichishanda nenyanzvi yeelectron microscopy Alessandro Genovese, timu yakawana transmission electron microscopy (TEM) mifananidzo ye cross-sections ye NGF pa nickel. "Kuona kuwirirana pakati pemafirimu egraphite uye nickel foil kubudirira kusati kwamboitika uye kunopa humwe ruzivo rwekukura kwemafirimu aya," akadaro Costa.
Ukobvu hweNGF hunowira pakati pemafirimu anotengeswa emicron-thick graphite uye single-layer graphene. "NGF inozadzisa graphene uye maindasitiri graphite mapepa, kuwedzera kune arsenal yeakaturikidzana kabhoni mafirimu," akadaro Costa. Semuenzaniso, nekuda kwekuchinjika kwayo, NGF inogona kushandiswa pakutarisira kupisa mumafoni anochinjika ayo ave kutanga kuoneka pamusika. "Kuenzaniswa nemafirimu egraphene, kubatanidzwa kweNGF kuchave kwakachipa uye kwakagadzikana," akawedzera.
Nekudaro, NGF ine zvakawanda zvinoshandiswa kupfuura kupisa kupisa. Chinhu chinonakidza chinoratidzwa mumifananidzo yeTEM ndechekuti zvimwe zvikamu zveNGF zvinongori mashoma mashoma akakora kabhoni. "Zvinoshamisa, kuvapo kwezvikamu zvakawanda zve graphene domains kunovimbisa kukwana kwakakwana kwechiedza chinooneka pachena mufirimu," akadaro Deoka. Chikwata chekutsvagisa chakafungidzira kuti conductive, translucent NGF inogona kushandiswa sechikamu chemasero ezuva kana sechinhu chekunzwa chekuona nitrogen dioxide gasi. "Tinoronga kubatanidza NGF mumidziyo kuitira kuti iite seyakawanda inoshanda zvinhu," akadaro Costa.
Rumwe ruzivo: Gitanjali Deokar et al., Kukura nekukurumidza kwema nanometer-akakora graphite mafirimu pane wafer-scale nickel foil uye ongororo yavo yezvimiro, Nanotechnology (2020). DOI: 10.1088/1361-6528/aba712
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Nguva yekutumira: Sep-05-2024