Kutulutsa kwa X-ray ndi ma elekitironi aulere akumangirira pazinthu za van der Waals.Ngongole: Technion - Israel Institute of Technology
Ofufuza aukadaulo apanga magwero olondola a radiation omwe akuyembekezeka kupangitsa kuti pakhale zopambana pakujambula zamankhwala ndi madera ena.Apanga magwero olondola a radiation omwe angalowe m'malo mwa zida zodula komanso zovuta zomwe zimagwiritsidwa ntchito pakali pano.Chida chomwe chikuyembekezeredwachi chimapanga ma radiation olamulidwa ndi mawonekedwe opapatiza omwe amatha kuwongoleredwa ndikusintha kwakukulu, pakugwiritsa ntchito mphamvu zochepa.Zomwe zapezazi zikuyenera kuti zitsogolere m'magawo osiyanasiyana, kuphatikiza kusanthula kwamankhwala ndi zida zamoyo, kujambula kwachipatala, zida za X-ray zowunikira chitetezo, komanso kugwiritsa ntchito zina zolondola za ma X-ray.

Lofalitsidwa mu nyuzipepala ya Nature Photonics, phunziroli linatsogoleredwa ndi Pulofesa Ido Kaminer ndi wophunzira wa mbuye wake Michael Shentcis monga gawo la mgwirizano ndi mabungwe angapo ofufuza ku Technion: Andrew ndi Erna Viterbi Faculty of Electrical Engineering, Solid State Institute, the Russell Berrie Nanotechnology Institute (RBNI), ndi Helen Diller Center for Quantum Science, Matter and Engineering.

Pepala la ochita kafukufuku likuwonetsa kuwunika koyeserera komwe kumapereka umboni woyamba wamalingaliro azongopeka omwe adapangidwa zaka khumi zapitazi pamndandanda wankhani zovomerezeka.Nkhani yoyamba pankhaniyi idawonekeranso mu Nature Photonics.Yolembedwa ndi Prof. Kaminer pa postdoc yake ku MIT, moyang'aniridwa ndi Prof. Marin Soljacic ndi Prof. John Joannopoulos, pepalalo limapereka mwachidziwitso momwe zida zamitundu iwiri zingapangire ma X-ray.Prof. Kaminer ananena kuti: “Nkhaniyi inasonyeza chiyambi cha ulendo wopita kumalo otulukira dzuwa potengera luso lapadera la zinthu zimene zili ndi mbali ziwiri komanso kuphatikizika kwake kosiyanasiyana.Takhala ndi luso lachidziwitso kuchokera m'nkhaniyi kuti tipange zolemba zotsatiridwa, ndipo tsopano, ndife okondwa kulengeza kuwunika koyamba pakupanga ma radiation a X-ray kuchokera kuzinthu zotere, ndikuwongolera moyenera magawo a radiation. .”

Zipangizo ziwiri-dimensional ndizopadera zopangapanga zomwe zidasokoneza asayansi mchaka cha 2004 ndi chitukuko cha graphene ndi akatswiri a sayansi ya zakuthambo Andre Geim ndi Konstantin Novoselov, omwe pambuyo pake adalandira Mphotho ya Nobel mu Fizikisi mu 2010. Graphene ndi mawonekedwe opangira a sayansi makulidwe amodzi a atomiki opangidwa kuchokera ku maatomu a carbon.Zomangamanga zoyamba za ma graphene zidapangidwa ndi omwe adalandira mphotho ya Nobel awiriwo posenda zigawo zopyapyala za graphite, "zolembera" za pensulo, pogwiritsa ntchito tepi yolumikizira.Asayansi awiriwa ndi ochita kafukufuku wotsatira adapeza kuti graphene ili ndi zinthu zapadera komanso zodabwitsa zomwe ndizosiyana ndi ma graphite: mphamvu yayikulu, kuwonekera kwathunthu, kuwongolera kwamagetsi, komanso kutulutsa kuwala komwe kumalola kutulutsa kwa radiation - mbali yokhudzana ndi nkhaniyi.Zinthu zapaderazi zimapanga ma graphene ndi zida zina zamitundu iwiri zomwe zimalonjeza mibadwo yamtsogolo ya masensa amadzimadzi ndi achilengedwe, ma cell a solar, semiconductors, monitors, ndi zina zambiri.

Winanso amene analandirapo mphoto ya Nobel amene ayenera kutchulidwa asanabwerere ku phunziro lino ndi Johannes Diderik van der Waals, amene anapambana Mphotho ya Nobel mu Fizikisi zaka 100 m’mbuyomo, mu 1910. Zipangizo zimene panopa zimatchedwa dzina lake—vdW materials—ndizo cholinga chake chachikulu. Kafukufuku wa Prof. Kaminer.Graphene ndi chitsanzo cha zinthu za vdW, koma kafukufuku watsopano tsopano apeza kuti zida zina zapamwamba za vdW ndizothandiza kwambiri popanga ma X-ray.Ofufuza a Technion apanga zida zosiyanasiyana za vdW ndikutumiza mizati ya ma elekitironi kudzera mwa iwo pamakona apadera omwe adatsogolera kutulutsa kwa X-ray mowongolera komanso molondola.Kuphatikiza apo, ofufuzawo adawonetsa kusinthasintha kwamphamvu kwa ma radiation pamlingo womwe sunachitikepo, pogwiritsa ntchito kusinthasintha popanga mabanja a zida za vdW.

Nkhani yatsopano ya gulu lofufuza ili ndi zotsatira zoyesera ndi chiphunzitso chatsopano chomwe pamodzi chimapereka umboni wa lingaliro la ntchito yatsopano ya zipangizo zamitundu iwiri monga dongosolo lophatikizana lomwe limatulutsa ma radiation olamulidwa ndi olondola.

"Kuyesera ndi chiphunzitso chomwe tidapanga kuti tifotokoze zimathandizira kwambiri pakuwunika kwa zinthu zopepuka ndikutsegula njira yogwiritsira ntchito mosiyanasiyana pazithunzi za X-ray (mwachitsanzo, X-ray yachipatala), mawonekedwe a X-ray omwe amagwiritsidwa ntchito. kuzindikiritsa zida, ndi magwero amtsogolo owunikira mu X-ray," adatero Prof. Kaminer.