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DNA Brush-Directed Vertical Alignment of Extensive Gold Nanorod Arrays with Controlled Density.

ABSTRACT: Control over the orientation of metal nanorods is important for both fundamental and applied research. We show that gold nanorods (GNRs) can be aligned in a single direction by adsorbing positively charged GNRs onto a double-strand DNA-grafted substrate through electrostatic interaction. The ordered structure can be optimized by controlling the density of the positive charges on the surface of the GNRs. We found, in agreement with the results of theoretical simulation, that the resultant structure exhibits plasmonic properties that are dependent on the GNR orientation relative to the direction of an oscillating electric field. Our approach provides new insights into the polymer-assisted self-assembly of rod-shaped nanoparticles utilizing electrostatic interactions.

SUBMITTER: Nakamura S

PROVIDER: S-EPMC6641014 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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DNA Brush-Directed Vertical Alignment of Extensive Gold Nanorod Arrays with Controlled Density.

Nakamura Satoshi S Nakamura Satoshi S Mitomo Hideyuki H Aizawa Miho M Tani Takeharu T Matsuo Yasutaka Y Niikura Kenichi K Pike Andrew A Naya Masayuki M Shishido Atsushi A Ijiro Kuniharu K

ACS omega 20170519 5

Control over the orientation of metal nanorods is important for both fundamental and applied research. We show that gold nanorods (GNRs) can be aligned in a single direction by adsorbing positively charged GNRs onto a double-strand DNA-grafted substrate through electrostatic interaction. The ordered structure can be optimized by controlling the density of the positive charges on the surface of the GNRs. We found, in agreement with the results of theoretical simulation, that the resultant structu ...[more]

PMID: 31457571

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