Helicoidal Patterning of Nanorods with Polymer Ligands.

TitleHelicoidal Patterning of Nanorods with Polymer Ligands.
Publication TypeJournal Article
Year of Publication2019
AuthorsE Galati, H Tao, M Tebbe, R Ansari, M Rubinstein, EB Zhulina, and E Kumacheva
JournalAngewandte Chemie International Edition
Volume58
Issue10
Start Page3123
Pagination3123 - 3127
Date Published03/2019
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.

DOI10.1002/anie.201812887
Short TitleAngewandte Chemie International Edition