Fitarwar X-ray ta hanyar electrons kyauta da ke yin tasiri akan kayan van der Waals.Credit: Technion - Cibiyar Fasaha ta Isra'ila
Masu bincike na fasaha sun samar da ingantattun hanyoyin radiation waɗanda ake tsammanin za su haifar da ci gaba a cikin hoton likita da sauran fannoni.Sun ƙirƙira madaidaicin tushen radiyo waɗanda za su iya maye gurbin kayan aiki masu tsada da wahala da ake amfani da su don irin waɗannan ayyuka a halin yanzu.Na'urar da aka ba da shawarar tana samar da radiation mai sarrafawa tare da kunkuntar bakan da za'a iya daidaitawa tare da babban ƙuduri, a ƙaramin saka hannun jari na makamashi.Sakamakon binciken na iya haifar da ci gaba a fannoni daban-daban, ciki har da nazarin sinadarai da kayan halitta, hoton likitanci, kayan aikin X-ray don tantance tsaro, da sauran amfani da ingantattun hanyoyin X-ray.

An buga shi a cikin mujallar Nature Photonics, Farfesa Ido Kaminer da ɗalibin maigidansa Michael Shentcis ne suka jagoranci binciken a matsayin wani ɓangare na haɗin gwiwa tare da cibiyoyin bincike da yawa a Technion: Andrew da Erna Viterbi Faculty of Electrical Engineering, da Solid State Institute, da Russell Berrie Nanotechnology Institute (RBNI), da Helen Diller Center for Quantum Science, Matter and Engineering.

Takardar masu binciken ta nuna wani abin lura na gwaji wanda ke ba da hujja ta farko-na-ra'ayi don ƙirar ƙa'idar da aka haɓaka cikin shekaru goma da suka gabata a cikin jerin abubuwan da aka tsara.Labarin farko akan batun kuma ya bayyana a cikin Nature Photonics.Farfesa Kaminer ne ya rubuta a lokacin da ya kammala karatunsa a MIT, karkashin kulawar Farfesa Marin Soljacic da Farfesa John Joannopoulos, wannan takarda ta gabatar da ka'idar yadda abubuwa biyu zasu iya haifar da hasken X-ray.A cewar Farfesa Kaminer, "Wannan labarin ya nuna farkon tafiya zuwa tushen radiation bisa tushen kimiyyar lissafi na musamman na kayan sassa biyu da haɗuwa daban-daban - heterostructures.Mun gina kan ci gaban ka'idar daga wannan labarin don haɓaka jerin abubuwan da suka biyo baya, kuma yanzu, muna farin cikin sanar da gwajin gwaji na farko game da ƙirƙirar radiation na X-ray daga irin waɗannan kayan, yayin da daidai sarrafa sigogi na radiation. .”

Kayayyakin nau'i-nau'i biyu ne na musamman na wucin gadi wanda ya dauki al'ummar kimiyya ta guguwa a cikin shekara ta 2004 tare da haɓakar graphene ta masana kimiyya Andre Geim da Konstantin Novoselov, wanda daga baya ya lashe kyautar Nobel a Physics a 2010. Graphene wani tsari ne na wucin gadi na kauri guda daya da aka yi daga carbon atom.Wadanda suka samu lambar yabo ta Nobel biyu ne suka kirkiro sifofin graphene na farko ta hanyar bare siraran siraran graphite, “kayan rubutu” na fensir, ta amfani da tef.Masana kimiyya guda biyu da masu binciken da suka biyo baya sun gano cewa graphene yana da kaddarorin na musamman da ban mamaki waɗanda suka bambanta da kaddarorin graphite: babban ƙarfi, kusan cikakkiyar fayyace, ƙarfin wutar lantarki, da ikon watsa haske wanda ke ba da damar fitar da hasken radiation—al’amari mai alaƙa da labarin yanzu.Waɗannan fasalulluka na musamman suna yin graphene da sauran abubuwa masu girma biyu waɗanda ke yin alƙawarin ga tsararraki masu zuwa na sinadarai da firikwensin halitta, ƙwayoyin hasken rana, semiconductor, masu saka idanu, da ƙari.

Wani wanda ya samu lambar yabo ta Nobel wanda ya kamata a ambata kafin ya koma ga binciken na yanzu shine Johannes Diderik van der Waals, wanda ya lashe kyautar Nobel a Physics daidai shekaru ɗari da suka gabata, a cikin 1910. Kayan da aka sanya masa suna yanzu - kayan vdW - sune abubuwan da suka fi mayar da hankali ga masana kimiyya. Binciken Farfesa Kaminer.Graphene kuma misali ne na kayan vdW, amma sabon binciken yanzu ya gano cewa sauran kayan vdW na zamani sun fi amfani da manufar samar da hasken X-ray.Masu binciken Technion sun samar da kayan vdW daban-daban kuma sun aika da igiyoyin lantarki ta hanyar su a wasu kusurwoyi na musamman waɗanda suka haifar da fitar da X-ray a cikin tsari da daidaito.Bugu da ƙari, masu binciken sun nuna madaidaicin juzu'i na bakan radiation a ƙudurin da ba a taɓa gani ba, ta yin amfani da sassauci wajen tsara iyalai na kayan vdW.

Sabuwar labarin ta ƙungiyar bincike ta ƙunshi sakamakon gwaji da sabon ka'idar da tare da samar da hujja-na-ra'ayi don sabon aikace-aikace na abubuwa biyu-girma a matsayin m tsarin cewa samar da sarrafawa da kuma daidai radiation.

"Gwajin da ka'idar da muka kirkira don bayyana shi yana ba da gudummawa mai mahimmanci ga nazarin hulɗar al'amuran haske da kuma share hanya don aikace-aikace daban-daban a cikin hoton X-ray (misali X-ray na likita, misali), X-ray spectroscopy da aka yi amfani da shi. don siffanta kayan aiki, da maɓuɓɓugan haske na gaba a cikin tsarin X-ray, "in ji Farfesa Kaminer.