教師資料查詢 | 類別: 期刊論文 | 教師: 彭維鋒 Pong, Way-faung (瀏覽個人網頁)

標題:Electronic structure and field emission properties of nitrogen doped graphene nano-flakes (GNFs:N) and carbon nanotubes (CNTs: N)
學年104
學期1
出版(發表)日期2015/10/03
作品名稱Electronic structure and field emission properties of nitrogen doped graphene nano-flakes (GNFs:N) and carbon nanotubes (CNTs: N)
作品名稱(其他語言)
著者Ray, S.C.; Pong, W.F.; Papakonstantinou P.
單位
出版者
著錄名稱、卷期、頁數Applied Surface Science 380, pp.301-304
摘要Substitution of hetero-atom doping is a promising route to modulate the outstanding material properties of carbon nanotubes and graphene for customized applications. Nitrogen-doping has been introduced to ensure tunable work-function, enhanced n-type carrier concentration, diminished surface energy, and manageable polarization. Along with the promising assessment of N-doping effects, research on the N-doped carbon based composite structures is emerging for the synergistic integration with various functional materials. Nitrogen undoped/doped graphene nano-flakes (GNFs/GNFs:N) and multiwall carbon nano-tubes (MWCNTs/MWCNTs:N) are used for comparative study of their electronic/bonding structure along with their defects state. X-ray absorption near edge structure (XANES) spectroscopy shows that the GNFs:N produce mainly pyridine like structure; whereas MWCNTs:N shows graphitic nitrogen atoms are attached with the carbon lattice. The ID/IG ratio obtained from Raman spectroscopy shows that the defects is higher in MWCNTs:N than GNFs:N. The electron field emission result shows that the turn on electric field is lower (higher electron emission current) in case of MWCNTs:N than GNFs:N and are good agreement with XANES and the results obtained from Raman spectra.
關鍵字X-ray absorption near edge structure (XANES) spectroscopy
語言其他
ISSN0169-4332
期刊性質國外
收錄於SCI;
產學合作國內;國外;
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,電子版,紙本
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