Manipulation and light-induced agglomeration of carbon nanotubes through optical trapping of attached silver nanoparticles
Manipulation and light-induced agglomeration of carbon nanotubes through optical trapping of attached silver nanoparticles
复制标题
通过附着的银纳米粒子的光学捕获来操纵和光诱导碳纳米管的团聚
DOI：
10.1088/0957-4484/19/21/215304
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发表时间：
2008
期刊：
影响因子：
3.5
通讯作者：
J. Zhang
中科院分区：
文献类型：
--
作者：
Chao Shi;Yi Zhang;C. Gu;L. Seballos;J. Zhang
一种简单的实验方法已经被证明用于操纵多壁碳纳米管（MWCNT）束通过连接的银纳米粒子（SNP）的光捕获。在我们的实验中，如果没有SNP，多壁碳纳米管由于其不规则的形状和大的纵横比而不能被捕获。然而，当与SNP混合时，使用532 nm的TEM 00模式激光，MWCNT可以与SNP一起被成功地捕获沿着。这归因于SNP的光捕获以及SNP与MWCNT之间由于静电力和货车德瓦尔斯力而引起的吸引相互作用或结合。因此，MWCNT束的光学操纵是通过操纵附着的银纳米颗粒/聚集体来实现的。此外，我们已经观察到光诱导的SNP/MWCNT的进一步聚集的现象，其可以潜在地用于制造图案化的MWCNT膜，用于未来的纳米级器件和其他应用。
A simple experimental method has been demonstrated for manipulating multi-walled carbon nanotube (MWCNT) bundles through the optical trapping of attached silver nanoparticles (SNPs). In our experiments, without the SNPs, the MWCNTs cannot be trapped due to their irregular shapes and large aspect ratio. However, when mixed with SNPs, the MWCNTs can be successfully trapped along with the SNPs using a TEM00 mode laser at 532 nm. This is attributed to the optical trapping of the SNPs and attractive interaction or binding between the SNPs and MWCNTs due to electrostatic and van der Waals forces. Therefore, optical manipulation of MWCNT bundles is achieved through the manipulation of the attached silver nanoparticles/aggregates. In addition, we have observed the phenomenon of light-induced further agglomeration of SNPs/MWCNTs which could potentially be exploited for fabricating patterned MWCNT films for future nanoscale devices and other applications.