He kumu mau loa ia o ka ikehu manuahi. Hoʻololi ʻia ka neʻe wela o ka graphene i uila
Ua hana nā kānaka ʻepekema ma ke Kulanui o Arkansas i kahi ʻōnaehana hiki ke hoʻoulu i ka uila mai ka neʻe wela o ka graphene. Hiki i ka mea hana ikehu i kūkulu ʻia ma luna o kona kumu ke hana no ka lōʻihi pehea ka lōʻihi o kēia mau mea a pau i ka mahana maʻamau - ma ka liʻiliʻi he manaʻo kēia i kūkulu ʻia i ʻekolu makahiki i hala.
Mea hana ikehu graphene. ʻAʻole paha no nā mīkini, akā no nā microsensors - ʻae. I ka wā e hiki mai ana
ʻO Graphene kahi "pepa" o nā ʻātoma kalapona i hoʻopili ʻia e nā paʻa hoʻokahi a me nā paʻa pālua. Hoʻonohonoho ʻia nā ʻātoma i nā hexagons a hana i kahi papa pālahalaha hoʻokahi ʻātoma mānoanoa, e hāʻawi ana i ka graphene i nā waiwai kupaianaha. ʻO kekahi o ia mau neʻe wela e hoʻoulu ai i nā wrinkles a me nā deformations ma ka pepa graphene.
ʻO Graphene ma lalo o kahi microscope electron transmission TEAM 0.5 i hoʻomohala ʻia e kahi hui ma ke Kulanui o Kaleponi, Berkeley. ʻO nā vertice melemele nā ʻātoma kalapona, aia nā puka ʻeleʻele i loko o nā hexagons. Inā manaʻo ʻoe e kuhikuhi ana ka ʻeleʻele i ka hema, e kali i kekahi mau kekona, e hoʻāʻo e ʻimi i ke kaha kalapona melemele ma ka ʻaoʻao ʻākau, a i ʻole e hoʻouka i ke kiʻi i loko o kahi hoʻoponopono kiʻi a hoʻololi koke iā ia i 90-180 degere. Ma IrfanView, hiki ke hana i kēia ma ke kaomi ʻana i ke pihi R(c) NCEM, University of California, Berkeley.
Ua paʻi nā kānaka ʻepekema ma ke Kulanui o Arkansas i kahi manaʻo i ʻekolu mau makahiki i hala aku nei e hōʻike ana i ka hoʻololi ʻana i ke ʻano o ka ʻili o ka graphene hiki ke hoʻohana i ka ikehu. Ua kū'ē kēia i ka helu ʻana a Richard Feynman, akā ua ʻike ʻia e hiki i ka graphene ma ka lumi wela ke hoʻohua maoli i ke au.
ʻO ka graphene lohi mālie i hoʻoulu ai i kahi alapine haʻahaʻa haʻahaʻa, a ʻo kahi ʻōnaehana i kūkulu ʻia e ka poʻe ʻepekema i hoʻololi iā ia i ke au pololei pulsating (DC) a hoʻonui hou ʻia (kumu). He mea koʻikoʻi kēia no ka mea ʻoi aku ka maikaʻi o ka uila uila ma kahi alapine haʻahaʻa.
ʻO ka hapa nui o ka counterintuitive ʻaʻole i wela ka resistor i hoʻohana ʻia i ka ʻōnaehana i ka wā o ka hana. Ma muli o ka loaʻa ʻana o ka ikehu mai ka hoʻololi ʻana i nā neʻe wela i ka uila, ua mālama ʻia ke koena. Inā pau ka uila, pono e maʻalili ka resistor.
Ma hope o ke kūkulu ʻana i kahi kiʻi i hoʻomākaukau ʻia e hōʻike ana i ka hana ʻana o ke kumumanaʻo i ka hoʻomaʻamaʻa (PoC), Ke hana nei nā kānaka ʻepekema i ka hiki ke mālama i ka ikehu i hana ʻia i loko o ka ʻōnaehana i kahi capacitor. E like me ka animation ma lalo nei ('ōmaʻomaʻo - nā uku maikaʻi ʻole, ʻulaʻula - nā lua, nā uku maikaʻi):
ʻO ka hana aʻe, ʻo ia ka hoʻoemi ʻana i nā mea āpau a kūkulu ʻia ma luna o kahi wafer silika. Inā lanakila, a inā hiki ke hoʻohui i hoʻokahi miliona o ia mau ʻōnaehana i hoʻokahi microcircuit, hiki iā ia ke hana ma ke ʻano he mea hoʻoheheʻe make ʻole o ka uila.
ʻO kekahi o nā prototypes o nā mea hana ikehu graphene (c) o ke Kulanui o Arkansas
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