Reinhardt Hendrik M, Bücker Kerstin, Hampp Norbert A
Opt Express. 2015 May 4;23(9):11965-74. doi: 10.1364/OE.23.011965.
Laser-induced reorganization and simultaneous fusion of nanoparticles is introduced as a versatile concept for pattern formation on surfaces. The process takes advantage of a phenomenon called laser-induced periodic surface structures (LIPSS) which originates from periodically alternating photonic fringe patterns in the near-field of solids. Associated photonic fringe patterns are shown to reorganize randomly distributed gold nanoparticles on a silicon wafer into periodic gold nanostructures. Concomitant melting due to optical heating facilitates the formation of continuous structures such as periodic gold nanowire arrays. Generated patterns can be converted into secondary structures using directed assembly or self-organization. This includes for example the rotation of gold nanowire arrays by arbitrary angles or their fragmentation into arrays of aligned gold nanoparticles.
激光诱导的纳米颗粒重组与同时融合被引入作为一种在表面形成图案的通用概念。该过程利用了一种称为激光诱导周期性表面结构（LIPSS）的现象，它源于固体近场中周期性交替的光子条纹图案。相关的光子条纹图案被证明能将硅片上随机分布的金纳米颗粒重组为周期性的金纳米结构。由于光学加热导致的伴随熔化促进了连续结构的形成，如周期性的金纳米线阵列。使用定向组装或自组织可以将生成的图案转换为二级结构。这包括例如将金纳米线阵列旋转任意角度或将它们破碎成排列的金纳米颗粒阵列。
