Title | Carbon fiber-promoted activation of catalyst for efficient growth of single-walled carbon nanotubes |
Authors | Xin, Benwu Gao, Wenke Ji, Zhonghai Zhang, Shuchen Xin, Liantao Zhao, Lifen Xue, Han Wu, Qianru Zhang, Lili Liu, Chang Zhang, Jin He, Maoshuai |
Affiliation | Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266590, Peoples R China Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Taishan Scholar Advantage & Characterist Discipli, Key Lab Ecochem Engn,Minist Educ, Qingdao 266042, Peoples R China Chinese Acad Sci, Inst Met Res, Adv Carbon Div, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci,Key Lab Phys & Chem Nano, Ctr Nanochem,Beijing Sci & Engn Ctr Nanocarbons, Beijing 100871, Peoples R China |
Keywords | CHEMICAL-VAPOR-DEPOSITION INTEGRATED-CIRCUITS SELECTIVE GROWTH ASSISTED GROWTH ALIGNED ARRAYS AREAL-DENSITY CVD GROWTH DIAMETER |
Issue Date | Jan-2020 |
Publisher | CARBON |
Abstract | Carbon fibers are placed onto substrate surface with dispersed Co particles to promote the growth efficiency of single-walled carbon nanotubes (SWNTs). During chemical vapor deposition (CVD) process, micro-spaces are fabricated between the carbon fibers and the substrate surface, which modify the Knudsen number of CO and increase its efficient contact with cobalt oxide nanoparticles, enhancing the reduction of catalysts and the nucleation of SWNTs. Compared with surface grown SWNTs without covering carbon fibers, SWNTs grown under carbon fibers demonstrate a much higher catalyst efficiency, i.e. a SWNT density as high as similar to 140 SWNTs/mm(2). X-ray photoelectron spectroscopy characterizations confirm that the presence of carbon fibers promotes the reduction of cobalt oxide catalyst particles and carbon dissolution inside catalyst particles, which are crucial for catalyst activation and subsequent SWNT nucleation. This work provides a new strategy for the efficient growth of SWNTs, which benefits high-density growth of SWNTs required for future nanoelectronics applications. (C) 2019 Elsevier Ltd. All rights reserved. |
URI | http://hdl.handle.net/20.500.11897/585536 |
ISSN | 0008-6223 |
DOI | 10.1016/j.carbon.2019.09.089 |
Indexed | SCI(E) EI |
Appears in Collections: | 化学与分子工程学院 |