Niaj hnub no peb tab tom ua pov thawj yuav ua li cas cov kws tshawb fawb tau sim ua kom siv cov khoom zoo ntawm cov khoom siv tsis ntev los no graphene. Cov kev cia siab zoo sib xws nyuam qhuav tau cog lus tseg Nyob rau hauv lub chav kuaj, ib tug nitrogen-raws li cov khoom uas nws cov khoom qhia txog qhov muaj peev xwm ntawm high conductivity los yog siab zog cia ceev.
Qhov kev tshawb pom yog tsim los ntawm ib pab pawg neeg tshawb fawb thoob ntiaj teb ntawm University of Bayreuth hauv lub teb chaws Yelemees. Raws li kev cai lij choj ntawm chemistry thiab physics, ib qho tshuaj lom neeg muaj peev xwm muaj nyob rau hauv daim ntawv ntawm ntau yam yooj yim sib txawv. Piv txwv li, oxygen (O2) tuaj yeem hloov mus rau hauv ozone (O3), thiab carbon rau hauv graphite lossis pob zeb diamond. Xws li hom muaj nyob ntawm tib lub ntsiab yog hu ua . Qhov teeb meem nrog nitrogen yog tias muaj tsawg tsawg ntawm nws cov allotropes - txog 15, thiab tsuas yog peb ntawm lawv yog cov hloov pauv polymer. Tab sis tam sim no muaj lwm cov polymer allotrope ntawm cov khoom no tau pom, hu ua "dub nitrogen".
"Black Nitrogen" tau tsim los siv lub pob zeb diamond anvil ntawm lub siab ntawm 1,4 lab cua ntawm qhov kub ntawm 4000 Β° C. Nyob rau hauv cov xwm txheej zoo li no, nitrogen tau txais ib qho qauv uas tsis tau pom dua dhau los - nws cov iav siv lead ua tau pib zoo li cov siv lead ua lattice ntawm cov phosphorus dub, uas ua rau hu rau lub xeev "dub nitrogen." Hauv lub xeev no, nitrogen muaj ob sab, txawm tias zigzag, qauv. Qhov ob-dimensionality qhia hais tias cov conductivity ntawm nitrogen nyob rau hauv lub xeev no tej zaum yuav replicate lub zog ntawm graphene, uas yuav pab tau thaum siv cov khoom nyob rau hauv electronics.
Tsis tas li ntawd, nyob rau hauv lub xeev tshiab, cov nitrogen atoms txuas nrog ib daim ntawv cog lus, uas yog rau lub sij hawm tsis muaj zog tshaj li triple daim ntawv cog lus, ib yam li cov ntaub ntawv uas zoo tib yam atmospheric nitrogen (N2). Qhov no txhais tau hais tias qhov rov qab ntawm "dub nitrogen" rau nws lub xeev ib txwm yuav nrog kev tso tawm ntawm lub zog tseem ceeb, thiab qhov no yog txoj hauv kev rau roj lossis roj hlwb. Tab sis tag nrho cov no yog ua ntej, thiab kom deb li deb tsis tau txawm ib kauj ruam tau coj mus rau txoj kev no, tab sis tsuas yog - lawv ntsia los ntawm lub qhov tseem ceeb thiab pom ib yam dab tsi.
Tau qhov twg los: 3d xov.ru