单壁碳纳米管结构可控生长的策略
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- 英文论文题名：Strategy for structure-specific growth of single-walled carbon nanotubes
- 论文作者：李彦
- 英文论文作者：Yan Li ; College of Chemistry and Molecular Engineering ; Peking University
- 年：2016
- 作者机构：北京大学化学与分子工程学院;
- 论文关键词：单壁碳纳米管 ; 可控生长 ; 催化剂 ; 金属间化合物 ; 生长动力学
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十九分会：纳米碳材料
- 语种：中文
- 分类号：O613.71;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十九分会 ; 纳米碳材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：131k
- 原文格式：D
- 会议级别：全国
摘要
单壁碳纳米管具有由其结构决定的优异性质,但是碳管的结构可控合成依然是一个巨大的挑战。利用碳纳米管片段或帽端以及催化剂作为结构模板有望得到单一手性的碳纳米管,而使用催化剂的方法效率更高,更有发展前景。我们发展了一类独特的钨基金属间化合物催化剂,它们具有奇特的结构和较高的熔点,在CVD过程中能够充当模板,生长出一定手性的单壁碳纳米管。利用W_6Co_7催化剂,我们生长出了(12,6)、(16,0)、(14,4)富集的碳纳米管样品。通过合适的催化剂选择和晶面结构设计以及CVD过程动力学条件的调控,这种方法有望成为一种普适性的单壁碳纳米管结构可控合成的策略。
Single-walled carbon nanotubes(SWNTs) present structure-determined outstanding properties. However, the structure-specific growth of SWNTs is always a great challenge. Carbon nanotubes and their caps or catalysts can all act as the structural templates to guide the formation of SWNTs with a specified chirality. SWNT growth via a catalyzed chemical vapour deposition CVD process is normally more efficient and therefore of great interest. We developed a new family of catalyst, tungsten-based intermetallic nanocrystals, to grow SWNTs with specified chiral structures. Such intermetallic nanocrystals present unique structure and atomic arrangements, which are distinctly different from the normal alloy nanoparticles or simple metal nanocrystals, therefore can act as the template to grow SWNTs with designed(n, m) structures. Using W_6Co_7 catalysts, we realized the selective growth of(12, 6),(16, 0),(14, 4) and other chiralities. By the cooperation of thermodynamic and kinetic factors, SWNTs with high chirality purity can be obtained.
Single-walled carbon nanotubes(SWNTs) present structure-determined outstanding properties. However, the structure-specific growth of SWNTs is always a great challenge. Carbon nanotubes and their caps or catalysts can all act as the structural templates to guide the formation of SWNTs with a specified chirality. SWNT growth via a catalyzed chemical vapour deposition CVD process is normally more efficient and therefore of great interest. We developed a new family of catalyst, tungsten-based intermetallic nanocrystals, to grow SWNTs with specified chiral structures. Such intermetallic nanocrystals present unique structure and atomic arrangements, which are distinctly different from the normal alloy nanoparticles or simple metal nanocrystals, therefore can act as the template to grow SWNTs with designed(n, m) structures. Using W_6Co_7 catalysts, we realized the selective growth of(12, 6),(16, 0),(14, 4) and other chiralities. By the cooperation of thermodynamic and kinetic factors, SWNTs with high chirality purity can be obtained.
引文
[1]Yang,F.;Wang,X.;Li,M.;Liu,X.;Zhang,D.;Yang,J.;Li,Y.Acc.Chem.Res.,2016,DOI:10.1021/acs.accounts.5b00485.
[2]Yang,F.;Wang,X.;Zhang,D.;Yang,J.;Luo,D.;Xu,Z.;Wei,J.;Wang,J.-Q.;Xu,Z.;Peng,F.;Li,X.;Li,R.;Li,Y.;Li,M.;Bai,X.;Ding,F.;Li,Y.Nature 2014,510(7506),522-524.
[3]Yang,F.;Wang,X.;Zhang,D.;Qi,K.;Yang,J.;Xu,Z.;Li,M.;Zhao,X.;Bai,X.;Li,Y.Journal of the American Chemical Society 2015,137(27),8688-8691.
[2]Yang,F.;Wang,X.;Zhang,D.;Yang,J.;Luo,D.;Xu,Z.;Wei,J.;Wang,J.-Q.;Xu,Z.;Peng,F.;Li,X.;Li,R.;Li,Y.;Li,M.;Bai,X.;Ding,F.;Li,Y.Nature 2014,510(7506),522-524.
[3]Yang,F.;Wang,X.;Zhang,D.;Qi,K.;Yang,J.;Xu,Z.;Li,M.;Zhao,X.;Bai,X.;Li,Y.Journal of the American Chemical Society 2015,137(27),8688-8691.