DNA-Encoded Tuning of Geometric and Plasmonic Properties of Nanoparticles Growing from Gold Nanorod Seeds

Tingjie Song, Longhua Tang, Li Huey Tan, Xiaojing Wang, Nitya Sai Reddy Satyavolu, Hang Xing, Zidong Wang, Jinghong Li, Haojun Liang, Yi Lu

Research output: Contribution to journalArticlepeer-review

Abstract

Systematically controlling the morphology of nanoparticles, especially those growing from gold nanorod (AuNR) seeds, are underexplored; however, the AuNR and its related morphologies have shown promises in many applications. Herein we report the use of programmable DNA sequences to control AuNR overgrowth, resulting in gold nanoparticles varying from nanodumbbell to nanooctahedron, as well as shapes in between, with high yield and reproducibility. Kinetic studies revealed two representative pathways for the shape control evolving into distinct nanostructures. Furthermore, the geometric and plasmonic properties of the gold nanoparticles could be precisely controlled by adjusting the base compositions of DNA sequences or by introducing phosphorothioate modifications in the DNA. As a result, the surface plasmon resonance (SPR) peaks of the nanoparticles can be fine-tuned in a wide range, from visible to second near-infrared (NIR-II) region beyond 1000 nm.

Original languageEnglish (US)
Pages (from-to)8114-8118
Number of pages5
JournalAngewandte Chemie - International Edition
Volume54
Issue number28
DOIs
StatePublished - Jul 1 2015

Keywords

  • DNA
  • gold
  • nanoparticles
  • nanostructures
  • surface plasmon resonance

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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