State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, P.R. China.
Department of Physics and Astronomy, University of Georgia , Athens, Georgia 30602, United States.
ACS Nano. 2017 Dec 26;11(12):12094-12102. doi: 10.1021/acsnano.7b04887. Epub 2017 Oct 23.
We show that the growth of Ag nanoparticles (NPs) follows the areas of maximum plasmonic field in nanohole arrays (NAs). We thus obtain Ag NP rings not connected to the metallic rim of the nanoholes. The photocatalytic effect resulting from the enhanced E-field of NAs boosts the reaction and is responsible for the site selectivity. The strategy, using plasmonics to control a chemical reaction, can be expanded to organic reactions, for example, synthesis of polypyrrole. After the NA film is removed, ordered ring-shaped Ag NPs are easily obtained, inspiring a facile micropatterning method. Overall, the results reported in this work will contribute to the control of chemical reactions at the nanoscale and are promising to inspire a facile way to pursue patterned chemical reactions.
我们表明，银纳米粒子（Ag NPs）的生长遵循纳米孔阵列（NAs）中最大等离子体场的区域。因此，我们获得了不与纳米孔金属边缘相连的 Ag NP 环。增强的 NAs 的 E 场产生的光催化效应促进了反应，是产生选择性的原因。这种利用等离子体控制化学反应的策略可以扩展到有机反应，例如聚吡咯的合成。当去除 NAs 薄膜后，很容易获得有序的环形 Ag NPs，为简便的微图案化方法提供了启示。总的来说，这项工作的结果将有助于控制纳米尺度的化学反应，并有望为寻求简便的图案化化学反应方法提供启示。
