Self-Assembly Guided One-Dimensional Arrangement of Gold Nanoparticles: A Facile Approach
Self-Assembly Guided One-Dimensional Arrangement of Gold Nanoparticles: A Facile Approach
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DOI：
10.1021/jp806932b
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发表时间：
2008-10
影响因子：
3.7
通讯作者：
O. P. Khatri;Jiwon Han;T. Ichii;K. Murase;H. Sugimura
中科院分区：
文献类型：
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作者：
O. P. Khatri;Jiwon Han;T. Ichii;K. Murase;H. Sugimura
金纳米粒子（AuNPs）在一维结构中具有独特的电子和光学性质。在这里，我们开发了一种简单的方法来将AuNP在硅表面上以良好对齐的一维排列方式排列。通过Si-C共价键连接到硅衬底上的构象有序的十六烷基（HD）单层被用作化学模板，以通过非接触模式扫描探针阳极氧化以线性方式构建纳米图案。在10%相对湿度下向硅衬底施加正偏压，并构建高度可再现的<30 nm宽的SiO2图案。的SiO2图案上的氨基封端的单分子层的位点选择性组装引导锚定的柠檬酸盐稳定的金纳米粒子的线性排列与控制的粒子间的距离，由静电相互作用，而HD覆盖的表面保持未暴露于金纳米粒子。
Gold nanoparticles (AuNPs) reveal fascinating electronic and optical properties, when they organize into one-dimensional architectures. Here, we developed a simple approach to immobilize the AuNPs in a well-aligned one-dimensional arrangement on a silicon surface. A conformationally ordered hexadecyl (HD) monolayer attached to a silicon substrate through Si−C covalent linkage was used as a chemical template to construct the nanopattern in a linear fashion by intermittent-contact mode scanning probe anodization. A positive bias voltage was applied to the silicon substrate at 10% relative humidity and constructs the highly reproducible <30 nm wide SiO2 pattern. The site selective assembly of the amino terminated monolayer on the SiO2 pattern guided the anchoring of citrate stabilized AuNPs in linear arrangements with controlled interparticle distance, as determined by electrostatic interactions, whereas the HD-covered surface remained unexposed to the AuNPs.