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在固体合金催化剂上单壁碳纳米管的奇拉性特异性生长

Feng Yang¹, Xiao Wang¹, Daqi Zhang¹

¹Beijing National Laboratory for Molecular Science, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

|June 27, 2014

概括

研究人员开发了一种新的催化剂,用于生长单基拉性单壁碳纳米管 (SWNT). 这一突破实现了超过92%的 (12,6) SWNT度的丰度,推进了纳米电子应用.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
化学化学化学

背景情况:

单壁碳纳米管 (SWNTs) 显示基于度 (n,m) 的可调节电子特性.
在纳米电子学中,实现结构纯的SWNT对于利用它们的结构功能关系至关重要.
目前生产特定SWNT状物的方法通常依赖于合成后的分离,这是低效的.

研究的目的:

开发一种方法,用于单基拉性SWNTs的直接,受控的生长.
确定催化剂特性,使SWNT生长具有高选择性.
推进用于先进应用的结构纯SWNT的生产.

主要方法:

化学蒸汽沉积 (CVD) 合成SWNTs.
使用基于的双金属合金纳米晶体作为催化剂.
在CVD期间调查催化剂点和晶体结构稳定性.
采用实验和模拟技术来理解催化剂-纳米管相互作用.

主要成果:

直接合成 (12,6) 单基亚性SWNTs,其丰度超过92%.
证明了基于的高点双金属合金纳米晶体的关键作用.
确定了催化剂平面和SWNT周长之间的结构匹配作为选择性的关键.

结论:

高点合金纳米晶体在CVD期间保持结构完整性,使选择性SWNT生长成为可能.
催化剂和纳米管之间的精确结构匹配对于性控制至关重要.
这种方法为SWNT合成提供了一条通向全性控制的途径,促进了纳米电子设备的开发.

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