Hansen Christian Rein, Westerlund Fredrik, Moth-Poulsen Kasper, Ravindranath Renu, Valiyaveettil Suresh, Bjørnholm Thomas
Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø, Denmark.
Langmuir. 2008 Apr 15;24(8):3905-10. doi: 10.1021/la703479w. Epub 2008 Mar 4.
We here report on the formation of well-ordered 2D gold nanostructures at the air/water interface. Spreading a mixture of alkanethiol-capped gold nanoparticles (AuNPs) and an amphiphilic poly(p-phenylene) on a water surface and compressing the mixture to a surface pressure of 40 mN/m lead to the formation of a network of well-ordered gold nanostructures. The structures are transferred horizontally (Langmuir-Schäfer) onto a solid substrate and investigated with TEM, AFM, and X-ray reflectivity, showing a pattern that is repeating over several micrometers. AFM and X-ray reflectivity data at different surface pressures reveal that the polymer is lifting the AuNPs 1.5-2 nm in the vertical direction, away from the polymer layer, when the pressure is increased from 20 to 40 mN/m.
我们在此报告在空气/水界面形成有序二维金纳米结构的情况。将烷硫醇封端的金纳米颗粒（AuNPs）与两亲性聚对苯撑的混合物铺展在水面上，并将混合物压缩至40 mN/m的表面压力，会导致形成有序金纳米结构网络。这些结构被水平转移（朗缪尔-施费尔法）到固体基底上，并用透射电子显微镜（TEM）、原子力显微镜（AFM）和X射线反射率进行研究，显示出在几微米范围内重复的图案。不同表面压力下的AFM和X射线反射率数据表明，当压力从20 mN/m增加到40 mN/m时，聚合物会使AuNPs在垂直方向上从聚合物层抬起1.5 - 2 nm。
