DNA Brush-Directed Vertical Alignment of Extensive Gold Nanorod Arrays with Controlled Density Satoshi Nakamura Hideyuki Mitomo Miho Aizawa Takeharu Tani Yasutaka Matsuo Kenichi Niikura Andrew Pike Masayuki Naya Atsushi Shishido Kuniharu Ijiro 10.1021/acsomega.7b00303.s001 https://acs.figshare.com/articles/journal_contribution/DNA_Brush-Directed_Vertical_Alignment_of_Extensive_Gold_Nanorod_Arrays_with_Controlled_Density/5026583 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. 2017-05-19 18:36:03 double-strand DNA-grafted substrate Controlled Density Control DNA Brush-Directed Vertical Alignment gold nanorods Extensive Gold Nanorod Arrays structure exhibits plasmonic properties rod-shaped nanoparticles GNR orientation metal nanorods polymer-assisted self-assembly interaction