X-ray e hlahisoa ke lielektrone tse sa lefelloeng tse kenyang thepa ea van der Waals.Mokitlane: Technion - Israel Institute of Technology
Bafuputsi ba theknoloji ba thehile mehloli e nepahetseng ea mahlaseli eo ho lebelletsoeng hore e tla lebisa katlehong ea litšoantšo tsa bongaka le libakeng tse ling.Ba qapile mehloli e nepahetseng ea mahlaseli e ka ’nang ea nkela thepa e turang le e boima e sebelisoang hona joale bakeng sa mesebetsi e joalo.Sesebelisoa se hlahisitsoeng se hlahisa mahlaseli a laoloang a nang le mahlaseli a moqotetsane a ka lokisoang ka tharollo e phahameng, ka matsete a fokolang a matla.Liphuputso li ka 'na tsa lebisa katlehong likarolong tse fapaneng, ho kenyeletsa tlhahlobo ea lik'hemik'hale le lisebelisoa tsa likokoana-hloko, litšoantšo tsa bongaka, lisebelisoa tsa X-ray bakeng sa ho hlahloba tšireletso, le tšebeliso e meng ea mehloli e nepahetseng ea X-ray.
E hatisitsoe koranteng ea Nature Photonics, thuto e ne e etelletsoe pele ke Moprofesa Ido Kaminer le moithuti oa mong'a hae Michael Shentcis e le karolo ea tšebelisano-'moho le litsi tse 'maloa tsa lipatlisiso Technion: Andrew le Erna Viterbi Faculty of Electrical Engineering, Solid State Institute, the Russell Berrie Nanotechnology Institute (RBNI), le Setsi sa Helen Diller sa Quantum Science, Matter le Engineering.
Pampiri ea bafuputsi e bonts'a tlhokomeliso ea liteko e fanang ka bopaki ba pele ba maikutlo bakeng sa mehlala ea maikutlo e ntlafalitsoeng lilemong tse leshome tse fetileng letotong la lingoloa tsa mantlha.Sengoliloeng sa pele se buang ka taba ena le sona se hlahile ho Nature Photonics.E ngotsoe ke Prof. Kaminer nakong ea postdoc ea hae MIT, tlas'a bookameli ba Prof. Marin Soljacic le Prof. John Joannopoulos, pampiri eo e ile ea hlahisa ka khopolo-taba hore na lisebelisoa tse peli-dimensional li ka etsa X-rays joang.Ho ea ka Prof. Kaminer, “sehlooho seo se ile sa tšoaea qaleho ea leeto la ho ea mehloling ea mahlaseli a kotsi a thehiloeng ho fisiks e ikhethang ea lintho tse mahlakore a mabeli le metsoako ea tsona e sa tšoaneng—libopeho tsa hetero.Re thehile holim'a tsoelo-pele ea khopolo-taba ho tsoa sengoloa seo ho theha letoto la lingoloa tse latelang, 'me joale, re thabile ho phatlalatsa tlhokomeliso ea pele ea liteko mabapi le ho theoa ha mahlaseli a X-ray ho tsoa linthong tse joalo, ha re ntse re laola ka nepo likarolo tsa radiation. .”
Lisebelisoa tse nang le mahlakore a mabeli ke mehaho e ikhethang ea maiketsetso e ileng ea hlasela sechaba sa saense ka selemo sa 2004 ka nts'etsopele ea graphene ke litsebi tsa fisiks Andre Geim le Konstantin Novoselov, eo hamorao a ileng a hapa Khau ea Nobel ea Fisiks ka 2010. Graphene ke mohaho oa maiketsetso oa botenya bo le bong ba athomo bo entsoeng ka liathomo tsa khabone.Mehaho ea pele ea graphene e entsoe ke bahapi ba babeli ba Nobel ka ho ebola likarolo tse tšesaane tsa graphite, e leng "ntho ea ho ngola" ea pentšele, ba sebelisa tepi ea ho hula.Bo-rasaense ba babeli le bafuputsi ba latelang ba fumane hore graphene e na le thepa e ikhethang le e makatsang e fapaneng le thepa ea graphite: matla a maholo, pepenene e batlang e le e feletseng, motlakase oa motlakase, le matla a ho fetisa leseli a lumellang mahlaseli a kotsi-e leng karolo e amanang le sehlooho sa hona joale.Likarolo tsena tse ikhethang li etsa hore graphene le lisebelisoa tse ling tse mahlakore a mabeli li tšepisa meloko e tlang ea lisensara tsa lik'hemik'hale le tsa likokoana-hloko, lisele tsa letsatsi, li-semiconductors, li-monitor le tse ling.
Mohapi e mong oa Nobel ea lokelang ho boleloa pele a khutlela thutong ea hona joale ke Johannes Diderik van der Waals, ea ileng a hapa Khau ea Nobel ea Fisiks hantle lilemo tse lekholo pele ho moo, ka 1910. Thepa eo hona joale e rehelletsoeng ka eena—lisebelisuoa tsa vdW—ke tsona tse tsepamisisang maikutlo. Phuputso ea Prof. Kaminer.Graphene hape ke mohlala oa thepa ea vdW, empa boithuto bo bocha hona joale bo fumana hore lisebelisoa tse ling tse tsoetseng pele tsa vdW li molemo haholo molemong oa ho hlahisa X-rays.Bafuputsi ba Technion ba hlahisitse lisebelisoa tse fapaneng tsa vdW mme ba romela maballo a elektrone ka tsona ka li-angles tse itseng tse lebisitseng ho nts'etsopele ea X-ray ka mokhoa o laoloang le o nepahetseng.Ho feta moo, bafuputsi ba bonts'itse ts'ebetso e nepahetseng ea mahlaseli a mahlaseli ka tharollo e e-s'o ka e e-ba teng, ba sebelisa mokhoa o bonolo oa ho rala malapa a lisebelisoa tsa vdW.
Sengoloa se secha sa sehlopha sa lipatlisiso se na le liphetho tsa liteko le khopolo e ncha eo hammoho e fanang ka bopaki ba mohopolo bakeng sa ts'ebeliso e ncha ea lisebelisoa tse mahlakore a mabeli e le sistimi e kopaneng e hlahisang mahlaseli a laoloang le a nepahetseng.
"Teko le khopolo eo re e hlahisitseng ho e hlalosa e na le tlatsetso e kholo thutong ea litšebelisano tsa leseli le ho bula tsela bakeng sa lits'ebetso tse fapaneng tsa litšoantšo tsa X-ray (mohlala, X-ray ea bongaka), spectroscopy ea X-ray e sebelisitsoeng. ho khetholla lisebelisoa, le mehloli ea leseli ea quantum nakong e tlang pusong ea X-ray," ho boletse Prof. Kaminer.
Nako ea poso: Oct-09-2020