He wero nui te whakamatao i ngā hikohiko kaha i roto i ngā waea atamai hou. Kua whakawhanakehia e ngā kairangahau o Te Whare Wānanga Pūtaiao me te Hangarau o King Abdullah tētahi tikanga tere me te whai hua mō te hanga rauemi waro e pai ana mō te whakamarara i te wera mai i ngā taputapu hiko. Ka kitea pea tēnei rauemi maha-whakamahinga, mai i ngā pūoko hau ki ngā panera rā.
He maha ngā taputapu hiko e whakamahi ana i ngā kiriata karāpeti hei kawe me te whakamarara i te wera e puta mai ana i ngā wāhanga hiko. Ahakoa he momo waro tūturu te karāpeti, he tono uaua te whakahaere wera i roto i ngā hiko, ā, he maha ngā wā ka whakawhirinaki ki te whakamahinga o ngā kiriata karāpeti kounga teitei, he matotoru te micron. "Heoi, he uaua, he nui hoki te kaha e hiahiatia ana mō te hanga i ēnei kiriata karāpeti mā te whakamahi i ngā polymer hei rauemi mata," te whakamārama a Gitanjali Deokar, he pou-tohu i te taiwhanga o Pedro Costa nāna i ārahi te mahi. Ka hangaia ngā kiriata mā roto i tētahi tukanga maha-taahiraa e hiahia ana kia tae ki te 3,200 nekehanga Celsius te pāmahana, ā, kāore e taea te hanga kiriata angiangi atu i te torutoru micron.
Kua whakawhanakehia e Deokar, Costa me ō rātou hoa mahi tētahi tikanga tere, whai hua hoki mō te hanga i ngā rau karāpiti he 100 nanometer te matotoru. I whakamahia e te tīma tētahi tikanga e kīia nei ko te matū kohu matū (CVD) hei whakatipu i ngā kiriata karāpiti (NGF) he matotoru te nanometer ki runga i te pepa nikara, ā, mā te nikara ka huri te methane wera hei karāpiti i runga i tōna mata. "I tutuki i a mātou te NGF i roto noa i te 5 meneti te roa o te tipu CVD i te pāmahana tauhohenga o te 900 nekehanga Celsius," te kī a Deokar.
Ka taea e te NGF te tipu hei rau tae atu ki te 55 cm2 te whānui, ā, ka tipu hoki i ngā taha e rua o te pepa konutea. Ka taea te tango me te whakawhiti ki ētahi atu mata me te kore e hiahiatia he paparanga tautoko polymer, he mea e hiahiatia ana i te wā e mahi ana me ngā kiriata graphene paparanga-kotahi.
I te mahi tahi me te tohunga karu hikohiko a Alessandro Genovese, i whiwhi te tīma i ngā whakaahua karu hikohiko tuku (TEM) o ngā wāhanga whakawhiti o te NGF i runga i te nikara. "He whakatutukitanga kore i kitea i mua te tirotiro i te hononga i waenga i ngā kiriata karāpeti me te pepa nikara, ā, ka whakaratohia he māramatanga atu ki te tikanga tipu o ēnei kiriata," te kī a Costa.
Ko te matotoru o te NGF kei waenganui i ngā kiriata karāhe matotoru-maikoron e wātea ana i te hokohoko me te karāhene papa-kotahi. "Ka tāpirihia e te NGF te karāhene me ngā rau karāhete ahumahi, ka tāpiri atu ki te whānuitanga o ngā kiriata waro paparanga," te kī a Costa. Hei tauira, nā tōna ngāwari, ka taea te whakamahi i te NGF mō te whakahaere wera i roto i ngā waea pūkoro ngāwari kua tīmata nei te puta ki te mākete. "Ki te whakaritea ki ngā kiriata karāhene, ka iti ake te utu me te pumau o te whakaurunga o te NGF," tāna tāpiri.
Heoi, he maha ngā whakamahinga o te NGF i tua atu i te whakamararatanga wera. Ko tētahi āhuatanga whakamere i roto i ngā whakaahua TEM ko ētahi wāhanga o te NGF he torutoru noa ngā paparanga waro matotoru. "He mea whakamiharo, ko te noho mai o ngā paparanga maha o ngā rohe graphene e whakarite ana i te nui o te māramatanga o te māramatanga e kitea ana puta noa i te kiriata," te kī a Deoka. I whakapae te rōpū rangahau ka taea te whakamahi i te NGF kawe hiko, mārama hei wāhanga o ngā pūtau rā, hei rauemi pūoko rānei mō te kimi i te hau hauota hauhā. "Kei te whakamahere mātou ki te whakauru i te NGF ki roto i ngā taputapu kia taea ai te mahi hei rauemi hohe maha-mahi," te kī a Costa.
Ētahi atu kōrero: Gitanjali Deokar et al., Te tipu tere o ngā kiriata karāti matotoru-nanometer i runga i te pepa nikara wafer-scale me tā rātou tātaritanga hanganga, Nanotechnology (2020). DOI: 10.1088/1361-6528/aba712
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Wā tuku: Hepetema-05-2024