Laser induced selective removal of metallic carbon nanotubes
Laser induced selective removal of metallic carbon nanotubes
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DOI：
10.1088/0957-4484/20/49/495202
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发表时间：
2009-12
期刊：
影响因子：
3.5
通讯作者：
M. Mahjouri‐Samani;Yunshen Zhou;W. Xiong;Yang Gao;M. Mitchell;Y. Lu
中科院分区：
文献类型：
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作者：
M. Mahjouri‐Samani;Yunshen Zhou;W. Xiong;Yang Gao;M. Mitchell;Y. Lu
根据碳纳米管（CNT）各自的电子特性区分它们对于开发基于CNT的电子和器件具有重要意义。在这项研究中，选择性去除金属碳纳米管的碳纳米管混合物在硅衬底上进行了研究，使用受控的激光照射。激光照射引起的强电场和光学近场效应会在金属碳纳米管内诱发自由电子运动和涡流。当适当选择激光能量密度和波长时，在空气中选择性加热金属CNT导致金属CNT的选择性去除。通过这个过程，金属纳米管被成功地从CNT混合物中去除。该技术提供了一种有效的单步方法，用于从CNT混合物中选择性地去除金属CNT。
Distinguishing between carbon nanotubes (CNTs) according to their individual electronic properties is of significant importance for developing CNT-based electronics and devices. In this study, selective removal of metallic CNTs from CNT mixtures on silicon substrates was investigated using controlled laser irradiation. Free electron movement and eddy currents are induced within the metallic CNTs by the strong electric field and optical near-field effects caused by the laser irradiation. Selective heating of metallic CNTs in air results in selective removal of metallic CNTs when the laser fluence and wavelength are properly selected. Through this process, metallic nanotubes are successfully removed from the CNT mixtures. This technique provides an efficient single-step approach for selective removal of metallic CNTs from CNT mixtures.