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標題:Change of Structural Behaviors of Organo-Silane Exposed Graphene Nanoflakes
學年98
學期1
出版(發表)日期2010/01/01
作品名稱Change of Structural Behaviors of Organo-Silane Exposed Graphene Nanoflakes
作品名稱(其他語言)
著者Pao, C. W.; Ray, S. C.; Tsai, H. M.; Chen, Y. S.; Chen, H.-C.; Lin, I.-N.; Pong, W. F.; Chiou, J. W.; Tsai, M.-H.; Shang,N. G.; Papakonstantinou,P.; Guo, J.-H.
單位淡江大學物理學系
出版者Washington, DC: American Chemical Society
著錄名稱、卷期、頁數The Journal of Physical Chemistry C 114(18), pp.8161-8166
摘要The electronic structures of graphene nanoflakes (GNFs) exposed to an organo-silane precursor [tetramethylsilane, TMS, Si(CH3)4] were studied using electron field emission (EFE), Raman spectroscopy, X-ray absorption near-edge structure (XANES), X-ray photoelectron spectroscopy (XPS), X-ray emission spectroscopy (XES), and first-principles calculation. The results of XANES, XPS, and Raman spectroscopy indicate that the silyl radical strong covalent bonds were formed in GNFs, which induced local structural relaxations and enhanced sp3 hybridization. Comparison of calculated electronic structure, XANES, and XES spectra of Sitreated GNFs suggests that the Si atom substitutes one 3-fold coordinated C atom in a given graphene layer and relaxes outward to form sp3 bonding with another C atom in the adjacent graphene layer. The EFE measurements show an increase in the turn-on electric field with the increase of the Si content, which suggests an enhancement of the nonmetallic sp3 bonding
關鍵字
語言英文
ISSN1932-7447
期刊性質國外
收錄於SCI
產學合作
通訊作者Ray, S. C.; Pong, W. F.
審稿制度
國別美國
公開徵稿
出版型式紙本
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