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首页> 外文期刊>Nanotechnology >Novel approach to the fabrication of Au/silica coreshell nanostructures based on nanosecond laser irradiation of thin Au films on Si
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Novel approach to the fabrication of Au/silica coreshell nanostructures based on nanosecond laser irradiation of thin Au films on Si

机译：基于Si上Au薄膜的纳秒激光辐照的Au /二氧化硅核壳纳米结构的新颖制备方法

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摘要

We demonstrate the possibility of producing Au/SiO _2 coreshell nanoparticles by nanosecond laser irradiation of thin (5 and 20nm) Au films on Si. The Au/Si eutectic reaction and dewetting process caused by the fast melting and solidification dynamics induced by the nanosecond laser irradiations are investigated as the origin of the formation of coreshell nanoparticles. Using several microscopic techniques (Rutherford backscattering spectrometry, scanning electron microscopy, atomic force microscopy, transmission electron microscopy, and energy filtered transmission electron microscopy) the formation and evolution of the coreshell structures are investigated as a function of the laser fluence in the 5001500mJcm ~2 range for both film thicknesses. In particular, the mean height and diameter and surface density evolution of the coreshell structures are quantified and correlated to the laser fluence and Au film thickness.
机译：我们证明了通过在硅上对5纳米和20纳米Au薄膜进行纳秒激光辐照来生产Au / SiO _2核壳纳米粒子的可能性。研究了由纳秒激光辐照引起的快速熔化和凝固动力学引起的Au / Si共晶反应和去湿过程，作为核壳纳米粒子形成的起源。使用几种微观技术（卢瑟福背散射光谱法，扫描电子显微镜，原子力显微镜，透射电子显微镜和能量过滤透射电子显微镜），研究了核壳结构的形成和演化与5001500mJcm〜2激光注量的关系。两种膜厚度的范围。特别地，核壳结构的平均高度和直径以及表面密度的变化被量化并与激光能量密度和金膜厚度相关。

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