One-dimensional confined motion of single metal atoms inside double-walled carbon nanotubes.
One-dimensional confined motion of single metal atoms inside double-walled carbon nanotubes.
复制标题
DOI：
10.1103/physrevlett.102.195504
复制
发表时间：
2009-05
影响因子：
8.6
通讯作者：
J. Warner;Yasuhiro Ito;M. Rümmeli;T. Gemming;B. Büchner;H. Shinohara;G. Briggs
中科院分区：
文献类型：
--
作者：
J. Warner;Yasuhiro Ito;M. Rümmeli;T. Gemming;B. Büchner;H. Shinohara;G. Briggs
用80 kV电子束原位辐照含La@C {82}金属富勒烯的豆荚状结构，制备了双壁碳纳米管（DWNTs）。使用这种低加速电压，我们发现在此时间段内外部单壁碳纳米管（SWNT）没有损坏，并且在照射的5-7分钟内完全形成内部纳米管。La金属原子被限制在内部的单壁碳纳米管的内部，并保持被困。我们证明了来自电子束辐照的能量可以驱动单个La原子的横向受限运动。两个La原子之间的相互作用被限制在一个DWNT的内部进行检查，我们发现大La La分离独特的一维环境。我们还证明了从DWNT豆荚形成TWNT。
Peapods containing La@C_{82} metallofullerenes are transformed into double-walled carbon nanotubes (DWNTs) using in situ electron beam irradiation at 80 kV. Using this low accelerating voltage we find no damage to the outer single-walled carbon nanotube (SWNT) within this time period and the complete formation of an inner nanotube within 5-7 min of irradiation. The La metal atoms are restricted to the interior of the inner SWNT and remain trapped. We demonstrate that energy from electron beam irradiation can drive the lateral confined motion of single La atoms. The interplay between two La atoms confined within the interior of a DWNT is examined and we find large La-La separation unique to this 1D environment. We also demonstrate the formation of TWNTs from DWNT peapods.