Izindaba

I-graphene iqukethe ungqimba olulodwa lwama-athomu ekhabhoni ahlelwe nge-lattice ene-hexagonal.Lesi sici sivumelana nezimo kakhulu futhi sinezinto ezinhle kakhulu ze-elekthronikhi, okwenza zikhange ezinhlelweni eziningi zokusebenza—ikakhulukazi izingxenye ze-elekthronikhi.
Abacwaningi abaholwa nguSolwazi uChristian Schönenberger we-Swiss Institute of Nanoscience kanye noMnyango weFiziksi eNyuvesi yase-Basel bafunde ngendlela yokusebenzisana.izakhiwo ze-elekthronikhi zezinto ngokusebenzisa ukwelula ngomshini.Ukuze benze lokhu, bakha uhlaka lapho ungqimba oluncane lwe-graphene oluncane lwe-athomu lunganwetshwa ngendlela elawulwayo kuyilapho kulinganiswa izici zalo ze-elekthronikhi.

Uma ingcindezi isetshenziswa kusuka ngezansi, ingxenye izogoba.Lokhu kubangela ungqimba olushumekiwe lwe-graphene ukuthi lunwebe futhi lushintshe izici zalo zikagesi.

Amasemishi eshalofini

Ososayensi baqale bakhiqiza isangweji “lesemishi” elinesendlalelo segraphene phakathi kwezingqimba ezimbili ze-boron nitride.Izingxenye ezinikezwe othintana nabo kagesi zisetshenziswa ku-substrate eguquguqukayo.

Abacwaningi babe sebesebenzisa i-wedge ukuze bafake ingcindezi phakathi nesemishi kusuka ngezansi."Siyisebenzisela ukugoba izingxenye ngendlela elawulwayo futhi sandise lonke ungqimba lwe-graphene," kuchaza umlobi wokuqala uDkt. Lujun Wang.

"Ukwelula i-graphene kusivumela ukuthi sishintshe ngokukhetha ibanga phakathi kwama-athomu e-carbon, ngaleyo ndlela siguqule amandla abo okubopha," wanezela umcwaningi wokuhlola uDkt. Andreas Baumgartner.

Isimo sikagesi esishintshiweAbacwaningi baqale basebenzisa izindlela zokubona ukuze balinganise ukunwetshwa kwe-graphene.Babe sebesebenzisa ugesi  izilinganiso zokuthutha ukutadisha ukuthi ukuguqulwa kwe-graphene kushintsha kanjani amandla e-electron.Lezi  izilinganiso zidinga ukwenziwa kokungu-269°C ukuze ubone izinguquko zamandla.

Imidwebo yezinga lamandla edivayisi ye-graphene engacindezelwe kanye ne-b strained (enomthunzi oluhlaza) i-graphene endaweni yokushaja emaphakathi (CNP).  "Ibanga phakathi kwama-nuclei lithinta ngokuqondile izici ze-electronic states ku-graphene," u-Baumgartnerifinyeze imiphumela."Uma ukwelula kufana, isivinini se-electron kuphela namandla angashintsha. Ushintsho kuamandla empeleni amandla e-scalar abikezelwa ngombono, futhi manje sesikwazile ukufakazela lokhu ngakhoukuhlola."  Kucatshangwa ukuthi le miphumela izoholela ekuthuthukisweni kwezinzwa noma izinhlobo ezintsha zama-transistors.Ngaphezu kwalokho,I-graphene, njengesistimu yemodeli yezinye izinto ezinezinhlangothi ezimbili, isibe yisihloko socwaningo esibalulekile emhlabeni wonkeeminyakeni yamuva.

Isikhathi sokuthumela: Jul-02-2021