Pab Pawg Science Island ua qhov kev vam meej tshiab hauv Txoj Kev Kawm Ntawm Macroscopic Lub Cev Ntawm Crystalline Graphene

Tsis ntev los no, ib pab neeg tshawb fawb Zhenyang Wang los ntawm lub koom haum ntawm Solid State, Hefei lub koom haum ntawm cov ntaub ntawv Science, Suav Academy ntawm Sciences, tau ua ib tug series ntawm kev nce qib nyob rau hauv covalent kev loj hlob ntawm heev crystalline graphene macrosomes thiab kev hloov kho ntawm lawv cov hluav taws xob cwj pwm, thiab lwm yam. Cov txiaj ntsig kev tshawb fawb tau luam tawm hauv Advanced Functional Materials thiab Chemical Engineering Journal.
Graphene yog ob-dimensional carbon cov khoom uas zoo heev mechanical, hluav taws xob, thermal thiab optical zog. Kev npaj ua tau zoo thiab kev sib dhos macroscopic ntawm graphene yog qhov tseem ceeb rau nws cov ntawv thov loj. Tam sim no, cov qauv kev npaj ntawm graphene macrosomes, xws li cov kua theem nws tus kheej-sib dhos, 3D luam ntawv thiab catalytic template txoj kev, tsuas tuaj yeem paub qhov tsis muaj qhov tsis muaj zog ntawm kev sib txuas ntawm graphene lamellae, uas ua rau tsis muaj kev cuam tshuam ntawm graphene crystal qauv thiab dhau los ua qhov tseem ceeb. txwv cov khoom hluav taws xob ntawm graphene macrosomes.
Raws li qhov no, cov kws tshawb fawb tau tsim cov txheej txheem laser-pab-los ntawm-txheej covalent txoj kev loj hlob los npaj cov crystalline graphene macrosomes, thiab molecular dynamics simulations theoretically qhia nws covalent kev loj hlob mechanism. Txoj kev loj hlob covalent tau ua rau cov khoom siv kom muaj cov qauv siv lead ua txuas ntxiv, thiab ua tiav ib qho 100-fold nce hauv nws cov txheej txheem sib txawv piv rau cov khoom siv tsis sib xws. Cov khoom siv pab daws cov teeb meem ntawm txheej txheej txheej, siv lead ua zoo tswj, ion thauj raws, ntim nyhuv thiab lwm yam teeb meem ntsib los ntawm graphene daim ntawv thov loj, thiab nteg lub hauv paus rau graphene lub zog cia electrode daim ntawv thov. Cov txiaj ntsig kev tshawb fawb cuam tshuam tau luam tawm hauv Cov Khoom Siv Ua Haujlwm Zoo Tshaj Plaws (Adv. Funct. Mater., 2023, DOI: 10.1002/adfm.202305191).
Tsis tas li ntawd, txhawm rau daws qhov teeb meem ntawm qhov tsis txaus conductivity tshwm sim los ntawm qhov tsis muaj hluav taws xob tsis muaj nyob hauv graphene electrodes, cov kws tshawb nrhiav tau qhia cov khoom siv hluav taws xob dawb-nplua nuj tooj liab nanoparticles rau hauv cov khoom siv, tsim kom muaj kev ruaj khov Cu-C daim ntawv cog lus ntawm qhov sib txuas ntawm Cu thiab graphene. , yog li paub txog cov khoom siv hluav taws xob ultra-siab ntawm cov khoom sib xyaw los ntawm kev txhaj tshuaj electron, nrog rau cov conductivity ncav cuag 0.37 × 107 S m-1, uas yog ze rau ntawm cov ntshiab hlau. Cov conductivity ncav cuag 0.37 × 107 S m-1, uas yog ze rau ntawm cov hlau ntshiab thiab 3000 npaug siab dua ntawm cov ntshiab graphene. X-ray kev nqus cov qauv zoo (xafs) spectroscopy ua ke nrog kev ua haujlwm ntawm kev ua haujlwm ntawm graphene kom tau raws li cov ntawv thov sib txawv. Cov txiaj ntsig tau luam tawm hauv Chemical Engineering Journal (Chem. Eng. J., 462, 142319 (2023)).
Cov haujlwm saum toj no tau txais kev txhawb nqa los ntawm National Key Research thiab Development Program ntawm Tuam Tshoj, National Natural Science Foundation ntawm Tuam Tshoj, Anhui Provincial Science thiab Technology Major Project, thiab Anhui Provincial Key Research thiab Development Program.