Iindaba

Igraphene iqulathe umaleko omnye weeathom zekhabhoni ezicwangciswe ngokwehexagonal lettice.Lo mbandela uguquguquka kakhulu kwaye uneempawu ezibalaseleyo ze-elektroniki, okwenza kube nomtsalane kwizicelo ezininzi-ingakumbi amacandelo e-elektroniki.
Abaphandi abakhokelwa nguNjingalwazi uChristian Schönenberger ovela kwiSwiss Institute of Nanoscience kunye neSebe lePhysics leDyunivesithi yaseBasel bafunde indlela yokulawulaiimpawu ze-elektroniki zemathiriyeli ngokusebenzisa ukolulwa koomatshini.Ukuze benze oku, baye baphuhlisa isakhelo apho umaleko wegraphene obhityileyo weathomu unokolulwa ngendlela elawulwayo ngelixa ulinganisa iimpawu zayo zombane.

Xa uxinzelelo lusetyenziswa ukusuka ngaphantsi, icandelo liya kugoba.Oku kubangela ukuba umaleko wegraphene odibeneyo ukuba ube nde kwaye utshintshe iimpawu zawo zombane.

Iisandwich kwishelufu

Oosonzululwazi baqala bavelisa isangweji "isandwich" enomaleko wegraphene phakathi kwamaleko amabini e-boron nitride.Amacandelo anikezelwe ngoqhagamshelwano lombane asetyenziswa kwi-substrate eguquguqukayo.

Abaphandi baye basebenzisa i-wedge ukufaka uxinzelelo kumbindi wesandwich ukusuka ngaphantsi."Siyisebenzisa ukugoba amacandelo ngendlela elawulwayo kwaye sandise yonke i-graphene layer," kuchaza umbhali wokuqala uDkt Lujun Wang.

"Ukwelula igraphene kusivumela ukuba sitshintshe ngokukhethiweyo umgama phakathi kwe-athomu ye-carbon, ngaloo ndlela sitshintshe amandla abo okubopha," wongezelela umphandi wovavanyo uDkt Andreas Baumgartner.

Imo yombane etshintshileyoAbaphandi baqale basebenzisa iindlela zamehlo ukulinganisa ukolula kwegraphene.Emva koko basebenzise umbane  imilinganiselo yothutho ukufunda indlela deformation of graphene ukutshintsha amandla electron.Ezi  imilinganiselo kufuneka yenziwe kwi-minus 269°C ukubona utshintsho lwamandla.

Imizobo yenqanaba lamandla esixhobo segraphene engaxinaniswanga kunye ne-b strained (i-green shaded) igraphene kwindawo engathathi hlangothi yentlawulo (CNP).  "Umgama phakathi kwe-nuclei uchaphazela ngokuthe ngqo iimpawu ze-electronic states kwi-graphene," i-Baumgartnerwashwankathela iziphumo."Ukuba ukuzolula kufana, kuphela isantya se-electron kunye namandla anokutshintsha. Utshintsho kwiAmandla ayinto enokwenzeka kwi-scalar eqikelelweyo yithiyori, kwaye ngoku sikwazile ukungqina okuimifuniselo."  Kucingelwa ukuba ezi ziphumo ziya kukhokelela ekuphuhlisweni kweenzwa okanye iintlobo ezintsha ze-transistors.Ukwengeza,I-graphene, njengenkqubo yemodeli yezinye izinto ezine-dimensional, ibe sisihloko sophando esibalulekileyo kwihlabathi jikelelekwiminyaka yakutshanje.

Ixesha lokuposa: Jul-02-2021