Computationally Guided Assembly of Oriented Nanocubes by Modulating Grafted Polymer鈥揝urface Interactions

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• 作者：Kargal. L. Gurunatha ; Sarrah Marvi ; Gaurav Arya ; Andrea R. Tao
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：November 11, 2015
• 年：2015
• 卷：15
• 期：11
• 页码：7377-7382
• 全文大小：391K
• ISSN：1530-6992

文摘

The bottom-up fabrication of ordered and oriented colloidal nanoparticle assemblies is critical for engineering functional nanomaterials beyond conventional polymer鈥損article composites. Here, we probe the influence of polymer surface ligands on the self-orientation of shaped metal nanoparticles for the formation of nanojunctions. We examine how polymer graft鈥搒urface interactions dictate Ag nanocube orientation into either edge鈥揺dge or face鈥揻ace nanojunctions. Specifically, we investigate the effect of end-functionalized polymer grafts on nanocube assembly outcomes, such as interparticle angle and interparticle distance. Our assembly results can be directly mapped onto our theoretical phase diagrams for nanocube orientation, enabling correlation of experimental variables (such as graft length and metal binding strength) with computational parameters. These results represent an important step toward unifying modeling and experimental approaches to understanding nanoparticle鈥損olymer self-assembly.