Graphene muaj ib txheej ntawm cov pa roj carbon uas teeb tsa ua ib lub lattice hexagonal. Cov khoom no yooj ywm heev thiab muaj cov khoom siv hluav taws xob zoo heev, ua rau nws zoo nkauj rau ntau yam kev siv - tshwj xeeb tshaj yog cov khoom siv hluav taws xob.
Cov kws tshawb fawb uas coj los ntawm Xibfwb Christian Schönenberger los ntawm Swiss Institute of Nanoscience thiab Department of Physics ntawm University of Basel tau kawm txog yuav ua li cas tswj hwm covcov khoom siv hluav taws xob ntawm cov ntaub ntawv los ntawm kev ncab tshuab.Yuav kom ua tau li no, lawv tau tsim ib lub moj khaum uas cov txheej graphene nyias nyias tuaj yeem ncab tau hauv txoj kev tswj hwm thaum ntsuas nws cov khoom siv hluav taws xob.
Thaum muaj kev nias los ntawm hauv qab no, cov khoom yuav khoov. Qhov no ua rau cov txheej graphene uas muab tso rau hauv kom ntev thiab hloov nws cov khoom hluav taws xob.
Cov sandwiches rau ntawm lub txee
Cov kws tshawb fawb tau tsim thawj zaug ib lub "sandwich" sandwich nrog ib txheej ntawm graphene ntawm ob txheej ntawm boron nitride. Cov khoom uas muab nrog cov khoom siv hluav taws xob raug siv rau ntawm cov substrate uas yoog tau.
Hloov pauv lub xeev hluav taws xobCov kws tshawb nrhiav thawj zaug siv cov txheej txheem kho qhov muag los kho qhov ncab ntawm graphene. Tom qab ntawd lawv siv hluav taws xob kev ntsuas kev thauj mus los los kawm txog seb qhov kev hloov pauv ntawm graphene hloov pauv lub zog hluav taws xob li cas. Cov no Yuav tsum tau ntsuas ntawm -269°C kom pom kev hloov pauv zog.
Cov duab qhia txog qib zog ntawm cov khoom siv ntawm graphene uas tsis muaj kev sib txhuam thiab b uas muaj kev sib txhuam (ntsuab ntxoov ntxoo) graphene ntawm qhov chaw them hluav taws xob nruab nrab (CNP). "Qhov deb ntawm cov nuclei ncaj qha cuam tshuam rau cov yam ntxwv ntawm cov xeev hluav taws xob hauv graphene," Baumgartnertau sau cov txiaj ntsig. "Yog tias qhov ncab yog sib xws, tsuas yog qhov ceev ntawm electron thiab lub zog thiaj li hloov pauv tau. Qhov kev hloov pauv hauvlub zog yog qhov tseem ceeb ntawm lub peev xwm scalar uas tau kwv yees los ntawm kev tshawb xav, thiab tam sim no peb tau ua pov thawj qhov no los ntawmkev sim. Nws muaj peev xwm xav tias cov txiaj ntsig no yuav ua rau muaj kev tsim cov sensors lossis cov hom transistors tshiab. Tsis tas li ntawd,graphene, ua ib lub qauv rau lwm cov ntaub ntawv ob-seem, tau dhau los ua ib qho kev tshawb fawb tseem ceeb thoob ntiaj teb hauvxyoo tas los no.
Lub sijhawm tshaj tawm: Lub Xya Hli-02-2021
