Controlled structural evolution of large silver nanoparticles and their DNA-Mediated bimetallic reversible assemblies

Ge Ah Kim, Sang Hun Han, Jae Seung Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We have synthesized the monodisperse large silver nanoparticles with a variety of controlled shapes and sizes using poly (sodium 4-styrene sulfonate) as a structure-directing reagent. We have demonstrated that the molecular weight (70K, 200K and 1000K) and concentration of the polymer can effectively and systematically control the silver nanoparticle structures that are strongly associated with the unique optical properties based upon their surface nanostructures. The crystalline structures of the particles have been further analyzed by diffraction methods. Importantly, the silver nanoparticles can be functionalized with DNA for reversible assembly formation with complementary DNA-gold nanoparticle conjugates, demonstrating that these novel structures can be utilized as smart probes and functional platforms for diagnostic and therapeutic applications. The reversibility of the bimetallic assembly is confirmed by the thermal denaturation.

Original languageEnglish
Pages (from-to)118-121
Number of pages4
JournalMaterials Letters
Volume68
DOIs
Publication statusPublished - 2012 Feb 1

    Fingerprint

Keywords

  • Assembly
  • Crystal growth
  • DNA
  • Functional
  • Microstructure
  • Polymers

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this