Kutonhodza magetsi ane simba mumafoni matsva kunogona kuva dambudziko guru. Vaongorori vepaKing Abdullah University of Science and Technology vakagadzira nzira inokurumidza uye inoshanda yekugadzira zvinhu zvekabhoni zvakanakira kubvisa kupisa kubva mumidziyo yemagetsi. Chinhu ichi chinogona kushandiswa nemamwe mashandisirwo, kubva kumasensa egasi kusvika kuma solar panels.
Midziyo yakawanda yemagetsi inoshandisa mafirimu egirafiti kuita kuti kupisa kubude nekudzima kupisa kunokonzerwa nezvinhu zvemagetsi. Kunyangwe girafiti iri mhando yechisikigo yekabhoni, kutonga kupisa mumagetsi ibasa rakaoma uye rinowanzoenderana nekushandiswa kwemafirimu egirafiti emhando yepamusoro ane goridhe. "Zvisinei, nzira yekugadzira mafirimu aya egirafiti uchishandisa mapolymers sezvinhu zvakabikwa yakaoma uye inoda simba," anotsanangura Gitanjali Deokar, postdoc murabhoritari yaPedro Costa uyo akatungamira basa iri. Mafirimu aya anoitwa kuburikidza nemaitiro akawanda anoda tembiricha inosvika 3,200 degrees Celsius uye haagone kugadzira mafirimu akatetepa kupfuura ma microns mashoma.
Deokar, Costa nevamwe vavo vakagadzira nzira inokurumidza uye isingashandise simba rakawanda yekugadzira mapepa egraphite ane ukobvu hwema nanometer zana. Chikwata ichi chakashandisa nzira inonzi chemical vapor deposition (CVD) kugadzira mafirimu egraphite ane ukobvu hwema nanometer (NGFs) pa nickel foil, uko nickel inokurudzira kushandurwa kwehot methane kuita graphite pamusoro payo. "Takawana NGF muchikamu chekukura kweCVD chemaminitsi mashanu chete patembiricha ye reaction ye900 degrees Celsius," akadaro Deokar.
NGF inogona kukura kuita machira anosvika 55 cm2 munzvimbo uye inokura kumativi ese efoil. Inogona kubviswa yoendeswa kune dzimwe nzvimbo pasina chikonzero che polymer support layer, inova chinhu chinodiwa pakushanda nemafirimu egraphene ane layer imwe chete.
Vachishanda nenyanzvi ye electron microscopy Alessandro Genovese, timu iyi yakawana mifananidzo ye transmission electron microscopy (TEM) yezvikamu zve NGF pa nickel. "Kuona kubatana kuripo pakati pe graphite films ne nickel foil ibudiriro isina kumboitika uye zvichapa rumwe ruzivo nezvekukura kwemafirimu aya," akadaro Costa.
Ukobvu hweNGF hunowira pakati pemafirimu egrafiti ane ukobvu hwe micron-layer anowanikwa kutengeswa uye graphene ine layer imwe chete. "NGF inowedzera graphene nemapepa egrafiti eindasitiri, zvichiwedzera kune akawanda emafirimu ecarbon ane layer," akadaro Costa. Semuenzaniso, nekuda kwekuchinjika kwayo, NGF inogona kushandiswa mukutarisira kupisa mumafoni anochinjika ari kutanga kuoneka pamusika. "Kana tichienzanisa nemafirimu egrafiti, kubatanidzwa kweNGF kuchave kwakachipa uye kwakasimba," akawedzera.
Zvisinei, NGF ine mashandisirwo akawanda kunze kwekuparadza kupisa. Chinhu chinonakidza chakaratidzwa mumifananidzo yeTEM ndechekuti zvimwe zvikamu zveNGF zvinongova zvikamu zvishoma zvekukora kwekabhoni. "Zvinoshamisa kuti kuvapo kwezvikamu zvakawanda zvegraphene kunovimbisa mwero wakakwana wechiedza chinoonekwa mukati mefirimu," akadaro Deoka. Chikwata chekutsvagisa chakafungidzira kuti NGF inofambisa mhepo, inopenya inogona kushandiswa sechikamu chemasero ezuva kana sechinhu chinoona gasi renitrogen dioxide. "Tinoronga kubatanidza NGF muzvishandiso kuitira kuti ishande sechinhu chinoshanda chinoshanda," akadaro Costa.
Rumwe ruzivo: Gitanjali Deokar et al., Kukura nekukurumidza kwemafirimu egraphite ane ukobvu hwenanometer pafoil ye nickel yakakora uye kuongorora kwavo chimiro, Nanotechnology (2020). DOI: 10.1088/1361-6528/aba712
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Nguva yekutumira: Gunyana-05-2024