Lu Jennifer Q, Yi Sung Soo
Agilent Laboratories, 3500 Deer Creek Road, Palo Alto, California 94304, USA.
Langmuir. 2006 Apr 25;22(9):3951-4. doi: 10.1021/la053377x.
A monolayer of gold-containing surface micelles has been produced by spin-coating solution micelles formed by the self-assembly of the gold-modified polystyrene-b-poly(2-vinylpyridine) block copolymer in toluene. After oxygen plasma removed the block copolymer template, highly ordered and uniformly sized nanoparticles have been generated. Unlike other published methods that require reduction treatments to form gold nanoparticles in the zero-valent state, these as-synthesized nanoparticles are in form of metallic gold. These gold nanoparticles have been demonstrated to be an excellent catalyst system for growing small-diameter silicon nanowires. The uniformly sized gold nanoparticles have promoted the controllable synthesis of silicon nanowires with a narrow diameter distribution. Because of the ability to form a monolayer of surface micelles with a high degree of order, evenly distributed gold nanoparticles have been produced on a surface. As a result, uniformly distributed, high-density silicon nanowires have been generated. The process described herein is fully compatible with existing semiconductor processing techniques and can be readily integrated into device fabrication.
通过旋涂由金改性的聚苯乙烯-b-聚（2-乙烯基吡啶）嵌段共聚物在甲苯中自组装形成的溶液胶束，制备了含单层金的表面胶束。在用氧等离子体去除嵌段共聚物模板后，生成了高度有序且尺寸均匀的纳米颗粒。与其他需要还原处理以形成零价态金纳米颗粒的已发表方法不同，这些合成的纳米颗粒为金属金形式。这些金纳米颗粒已被证明是用于生长小直径硅纳米线的优异催化剂体系。尺寸均匀的金纳米颗粒促进了具有窄直径分布的硅纳米线的可控合成。由于能够形成高度有序的单层表面胶束，在表面上产生了均匀分布的金纳米颗粒。结果，生成了均匀分布、高密度的硅纳米线。本文所述的工艺与现有的半导体加工技术完全兼容，并且可以很容易地集成到器件制造中。
