2016年9月
Self-assembly of like-charged nanoparticles into Voronoi diagrams
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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- 巻
- 18
- 号
- 36
- 開始ページ
- 25735
- 終了ページ
- 25740
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1039/c6cp04297j
- 出版者・発行元
- ROYAL SOC CHEMISTRY
The self-assembly of nanoscopic building blocks into higher order macroscopic patterns is one possible approach for the bottom-up fabrication of complex functional systems. Macroscopic pattern formation, in general, is determined by the reaction and diffusion of ions and molecules. In some cases macroscopic patterns emerge from diffusion and interactions existing between nanoscopic or microscopic building blocks. In systems where the distribution of the interaction-determining species is influenced by the presence of a diffusion barrier, the evolving macroscopic patterns will be determined by the spatiotemporal evolution of the building blocks. Here we show that a macroscopic pattern can be generated by the spatiotemporally controlled aggregation of like-charged carboxyl-terminated gold nanoparticles in a hydrogel, where clustering is induced by the screening effect of the sodium ions that diffuse in a hydrogel. Diffusion fronts of the sodium ions and the induced nanoparticle aggregation generate Voronoi diagrams, where the Voronoi cells consist of aggregated nanoparticles and their edges are aggregation-free and nanoparticle-free zones. We also developed a simple aggregation-diffusion model to adequately describe the evolution of the experimentally observed Voronoi patterns.
- リンク情報
- ID情報
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- DOI : 10.1039/c6cp04297j
- ISSN : 1463-9076
- eISSN : 1463-9084
- Web of Science ID : WOS:000384249300105