Directed Assembly of Gold Nanorods by Terminal-Base Pairing of Surface-Grafted DNA

Guoqing Wang, Yoshitsugu Akiyama, Naoki Kanayama, Tohru Takarada, Mizuo Maeda

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Directed assemblies of anisotropic metal nanoparticles exhibit attractive physical and chemical properties. However, an effective methodology to prepare differently directed assemblies from the same anisotropic nanoparticles is not yet available. Gold nanorods (AuNRs) region-selectively modified with different DNA strands can form side-by-side (SBS) and end-to-end (ETE) assemblies in a non-crosslinking manner. When the complementary DNA is hybridized to the surface-bound DNA, stacking interaction between the blunt ends takes place in the designated regions. Such AuNRs assemble into highly ordered structures, assisted by capillary forces emerging on the substrate surface. Moreover, insertion of a mercury(II)-mediated thymine–thymine base pair into the periphery of the DNA layer allows selective formation of the SBS or ETE assemblies from the strictly identical AuNRs with or without mercury(II).

Original languageEnglish
Article number1702137
JournalSmall
Volume13
Issue number44
DOIs
Publication statusPublished - Nov 27 2017
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

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