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Stimulation of the local growth of aligned carbon nanotubes by pulse laser exposure of the substrate

机译：通过脉冲激光暴露基板来刺激排列的碳纳米管的局部生长

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摘要

The local stimulation of carbon nanotubes (CNT) growth at the laser-modified sites that have been obtained by excimer laser irradiation at 248 nm causing a local surface modification has been investigated by two different processing methods. The influence of the laser processing parameters on the CNT growth is compared for the irradiation of thin spin-coated iron nitrate films on silicon substrates and the backside irradiation of a fused silica substrate being in contact with an iron nitrate solution. Both techniques cause the formation of catalytic surface sites either by decomposition of the film or by deposition from the solution. For both laser modification approaches the local growth of vertical aligned nanotubes has been observed. In the case of spin-coated film the laser irradiation conditions have only a small influence on the CNT growth whereas at backside modification by means of a solution a strong dependence on the laser processing parameters has been found.
机译：已经通过两种不同的加工方法研究了通过在248nm受激准分子激光辐照获得的激光改性位点处的碳纳米管（CNT）生长的局部刺激，引起了局部表面改性。比较了激光加工参数对CNT生长的影响，用于在硅基板上辐照旋涂的硝酸铁薄膜的辐照，以及与硝酸铁溶液接触的熔融二氧化硅基板的背面辐照。两种技术都通过膜的分解或从溶液中的沉积引起催化表面部位的形成。对于两种激光改性方法，已经观察到垂直排列的纳米管的局部生长。在旋涂膜的情况下，激光辐照条件仅对CNT的生长产生很小的影响，而在通过溶液进行背面改性时，发现对激光加工参数的依赖性很大。

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