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Reversible Changes in the Orientation of Gold Nanorod Arrays on Polymer Brushes

Abstract

Nanoparticles exhibit a number of unique properties such as localized surface plasmon resonance (LSPR). As this LSPR is sensitive to geometrical or spatial conditions, the arrangement of nanoparticles, in particular the active arrangement of plasmonic structures, is an important issue. In this study, gold nanorod (GNR) arrays were prepared by GNR attachment on anionic polymer (DNA) brushes via electrostatic interactions and their stimuli-responsive changes in orientation were investigated. As a result, the orientation of GNR arrays on DNA brushes reversibly changed by the modulation of electrostatic interactions between GNRs and polymers via changes in the solution pH. As these extensive GNR arrays are prepared via easy bottom-up processes, GNR surface properties are easily tuned by simple modification, and DNAs would be replaceable to various synthetic polymers, these consider that this study leads to the development of next-generation materials and devices with actively tunable structures.

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Supplementary files

Article information


Submitted
22 Apr 2020
Accepted
21 May 2020
First published
22 May 2020

This article is Open Access

Nanoscale Adv., 2020, Accepted Manuscript
Article type
Communication

Reversible Changes in the Orientation of Gold Nanorod Arrays on Polymer Brushes

Y. Sekizawa, H. Mitomo, M. Nihei, S. Nakamura, Y. Yonamine, A. Kuzuya, T. Wada and K. Ijiro, Nanoscale Adv., 2020, Accepted Manuscript , DOI: 10.1039/D0NA00315H

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