Gold Nanoparticle Assemblies on Surfaces: Reactivity Tuning through Capping-Layer and Cross-Linker Design

Sreejith Shankar, Meital Orbach, Revital Kaminker, Michal Lahav, Milko van der Boom

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The immobilization of metal nanoparticles (NPs) with molecular control over their organization is challenging. Herein, we report the formation of molecularly cross-linked AuNP assemblies using a layer-by-layer approach. We observed four types of assemblies: 1)small aggregates of individual AuNPs, 2)large aggregates of individual AuNPs, 3)networks of fused AuNPs, and 4) gold islands. Interestingly, these assemblies with the different cross-linkers and capping layers represent different stages in the complete fusion of AuNPs to afford islands of continuous gold. We demonstrate that the stability toward fusion of the nanoparticles of the on-surface structures can be controlled by the reactivity of the cross-linkers and the hydrophilicity/hydrophobicity of the nanoparticles.

Original languageEnglish
JournalChemistry - A European Journal
DOIs
Publication statusAccepted/In press - 2016

    Fingerprint

Keywords

  • Aggregation
  • Capping layer
  • Coordination modes
  • Cross-linkers
  • Nanoparticles
  • Surfaces

ASJC Scopus subject areas

  • Chemistry(all)

Cite this