Helicoidal Patterning of Nanorods with Polymer Ligands. (16th January 2019)

• Record Type: Journal Article
• Authors: Galati, Elizabeth; Tao, Huachen; Tebbe, Moritz; Ansari, Rija; Rubinstein, Michael; Zhulina, Ekaterina B.; Kumacheva, Eugenia
• Is Part Of: Angewandte Chemie. Volume 131:Number 10(2019)
• Page Start: 3155
• Page End: 3159
• Publication Date: 2019-01-16
• Subjects: Helikale Strukturen -- Musterbildung -- Nanostäbchen -- Polymere -- Selbstorganisation; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201812887
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Chiral packing of ligands on the surface of nanoparticles (NPs) is of fundamental and practical importance, as it determines how NPs interact with each other and with the molecular world. Herein, for gold nanorods (NRs) capped with end‐grafted nonchiral polymer ligands, we show a new mechanism of chiral surface patterning. Under poor solvency conditions, a smooth polymer layer segregates into helicoidally organized surface‐pinned micelles (patches). The helicoidal morphology is dictated by the polymer grafting density and the ratio of the polymer ligand length to nanorod radius. Outside this specific parameter space, a range of polymer surface structures was observed, including random, shish‐kebab, and hybrid patches, as well as a smooth polymer layer. We characterize polymer surface morphology by theoretical and experimental state diagrams. The helicoidally organized polymer patches on the NR surface can be used as a template for the helicoidal organization of other NPs, masked synthesis on the NR surface, as well as the exploration of new NP self‐assembly modes.