標題: Highly graphitized laterally interconnected SWCNT network synthesis via a sandwich-grown method
作者: Teng, I-Ju
Chen, Kai-Ling
Hsu, Hui-Lin
Jian, Sheng-Rui
Wang, Li-Chun
Chen, Jung-Hsuan
Wang, Wei-Hsiang
Kuo, Cheng-Tzu
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 13-Apr-2011
摘要: We present a sandwich-grown method for growing laterally interconnected single-walled carbon nanotube (SWCNT) networks with a high degree of graphitization by microwave plasma chemical vapour deposition (MPCVD). An Al(2)O(3)-supported Fe catalyst precursor layer deposited on an oxidized Si substrate with an upper Si cover is first pretreated in pure hydrogen, and then exposed to a gas mixture of methane/hydrogen for growth process at a lower growth temperature and a faster rate. The effects of various parameters, such as catalyst film thickness, gas flow rate, working pressure, growth time and plasma power, on the morphologies and structural characteristics of the SWCNT networks are investigated, and therefore provide the essential conditions for direct growth of laterally interconnected SWCNT networks. Analytical results demonstrate that the SWCNT-based lateral architecture comprises a mixture of graphene-sheet-wrapped catalyst particles and laterally interconnected nanotubes, isolated or branched or assembled into bundles. The results also show that the formation of the laterally interconnected SWCNT networks is related to the sandwich-like stack approach and the addition of an Al(2)O(3) layer in the MPCVD process. The successful growth of lateral SWCNT networks provides new experimental information for simply and efficiently preparing lateral SWCNTs on unpatterned substrates, and opens a pathway to create network-structured nanotube-based devices.
URI: http://dx.doi.org/10.1088/0022-3727/44/14/145401
http://hdl.handle.net/11536/9002
ISSN: 0022-3727
DOI: 10.1088/0022-3727/44/14/145401
期刊: JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume: 44
Issue: 14
結束頁: 
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