Nws yog qhov tseeb heev uas hais tias graphite yog ib qho semiconductor. Hauv qee qhov kev tshawb fawb pem hauv ntej, cov ntaub ntawv carbon xws li carbon nanotubes, carbon molecular sieve films thiab pob zeb diamond zoo li carbon films (feem ntau muaj qee qhov tseem ceeb ntawm cov khoom semiconductor nyob rau hauv qee yam mob)graphite cov ntaub ntawv, tab sis lawv cov microstructure yog qhov txawv ntawm cov txheej txheem graphite.
Nyob rau hauv graphite, muaj plaub electrons nyob rau hauv lub sab nrauv txheej ntawm carbon atoms, peb ntawm uas tsim covalent daim ntawv cog lus nrog cov electrons ntawm lwm cov pa roj carbon atoms, yog li ntawd txhua carbon atom muaj peb electrons los ua covalent bonds, thiab qhov seem yog hu ua π electrons. . Cov π electrons txav li ntawm qhov chaw ntawm cov khaubncaws sab nraud povtseg, thiab cov conductivity ntawm graphite feem ntau yog nyob ntawm cov π electrons. Los ntawm cov txheej txheem tshuaj, tom qab cov pa roj carbon monoxide tau hloov mus rau hauv cov khoom ruaj khov, xws li carbon dioxide, cov conductivity tsis muaj zog. Yog hais tias cov graphite yog oxidized, cov π electrons yuav tsim covalent daim ntawv cog lus nrog cov electrons ntawm oxygen atoms, yog li lawv tsis tuaj yeem txav mus tau ywj pheej, thiab cov conductivity yuav txo qis heev. Qhov no yog Conductive txoj cai ntawmgraphite neeg xyuas pib.
Kev lag luam semiconductor feem ntau yog tsim los ntawm kev sib xyaw ua ke, optoelectronics, separators thiab sensors. Cov ntaub ntawv tshiab semiconductor yuav tsum ua raws li ntau txoj cai los hloov cov ntaub ntawv silicon tsoos thiab yeej kev lag luam lees paub. Photoelectric effect thiab Hall effect yog ob txoj cai tseem ceeb tshaj plaws niaj hnub no. Cov kws tshawb fawb tau soj ntsuam quantum Hall nyhuv ntawm graphene ntawm chav tsev kub thiab pom tias graphene yuav tsis tsim rov qab tawg tom qab ntsib impurities, qhia tau hais tias nws muaj super conductive zog. Tsis tas li ntawd, graphene yuav luag pob tshab nrog lub qhov muag liab qab thiab muaj siab heev transparency. Graphene muaj cov khoom siv kho qhov muag zoo heev thiab yuav hloov nrog nws cov tuab. Nws yog haum rau daim ntawv thov nyob rau hauv lub teb ntawm optoelectronics. Graphene muaj ntau yam khoom zoo heev thiab yuav siv tau rau hauv ntau qhov chaw, xws li zaub screen, capacitor, sensor thiab lwm yam.
Post lub sij hawm: Jan-07-2022