Self-Assembled Growth, Microstructure, and Field-Emission High-Performance of Ultrathin Diamond Nanorods
學年 97
學期 2
出版（發表）日期 2009-04-01
作品名稱 Self-Assembled Growth, Microstructure, and Field-Emission High-Performance of Ultrathin Diamond Nanorods
作品名稱（其他語言）
著者 Shang, Naigui; Papakonstantinou, Pagona; Wang, Peng; Zakharov, Alexei; Palnitkar, Umesh; Lin, I-Nan; Chu, Ming; Stamboulis, Artemis
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 ACS Nano 3(4), pp.1032-1038
摘要 We report the growth of ultrathin diamond nanorods (DNRs) by a microwave plasma assisted chemical vapor deposition method using a mixture gas of nitrogen and methane. DNRs have a diameter as thin as 2.1 nm, which is not only smaller than reported one-dimensional diamond nanostructures (4−300 nm) but also smaller than the theoretical value for energetically stable DNRs. The ultrathin DNR is encapsulated in tapered carbon nanotubes (CNTs) with an orientation relation of (111)diamond//(0002)graphite. Together with diamond nanoclusters and multilayer graphene nanowires/nano-onions, DNRs are self-assembled into isolated electron-emitting spherules and exhibit a low-threshold, high current-density (flat panel display threshold: 10 mA/cm2 at 2.9 V/μm) field emission performance, better than that of all other conventional (Mo and Si tips, etc.) and popular nanostructural (ZnO nanostructure and nanodiamond, etc.) field emitters except for oriented CNTs. The forming mechanism of DNRs is suggested based on a heterogeneous self-catalytic vapor−solid process. This novel DNRs-based integrated nanostructure has not only a theoretical significance but also has a potential for use as low-power cold cathodes.
關鍵字 diamond nanorods; carbon nanotube; aberration-corrected TEM ;HAADF; PEEM ;NEXAFS; field emission
語言 en
ISSN 1936-0851; 1936-086X
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者 Shang, Naigui
審稿制度
國別 USA
公開徵稿
出版型式 紙本
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