Swiss Center for Electronics and Microtechnology (CSEM), Division of Nanotechnology and Life Science, Neuchâtel, Switzerland.
J Colloid Interface Sci. 2011 Apr 15;356(2):496-504. doi: 10.1016/j.jcis.2010.12.081. Epub 2011 Jan 12.
We report a simple and versatile self-assembly method for controlling the placement of functional gold nanoparticles on silicon substrates using micellar templates. The hierarchical positioning of gold nanoparticles is achieved in one-step during the spontaneous phase inversion of spherical poly(styrene)-block-poly(2-vinylpyridine) copolymer micelles into nanoring structures. The placement is mainly driven by the establishment of electrostatic interactions between the nanoparticle ligands and the pyridine groups exposed at the interface. In particular, we show the formation of ordered arrangements of single gold nanoparticles or nanoparticle clusters and demonstrate that their morphologies, densities and periodicities can be tuned by simply varying the initial block copolymer molecular weight or the deposition conditions. Besides gold nanoparticles, the method can be used for controlling the assembly of a large variety of nanoscale building blocks, thus opening an attractive pathway for generating functional hybrid surfaces with periodic nanopatterns.
我们报告了一种简单而通用的自组装方法，可使用胶束模板控制功能金纳米粒子在硅衬底上的放置位置。在球形聚苯乙烯-嵌段-聚（2-乙烯基吡啶）共聚物胶束自发相转化为纳米环结构的过程中，金纳米粒子的分级定位可在一步内实现。纳米粒子的放置主要由纳米粒子配体与暴露在界面处的吡啶基团之间的静电相互作用驱动。特别是，我们展示了单金纳米粒子或纳米粒子簇的有序排列的形成，并证明通过简单地改变初始嵌段共聚物分子量或沉积条件可以调节它们的形态、密度和周期性。除了金纳米粒子之外，该方法还可用于控制各种纳米级构建块的组装，从而为具有周期性纳米图案的功能混合表面的生成开辟了一条有吸引力的途径。
