Chemoresponsive Colloidosomes via Ag⁺ Soldering of Surface-Assembled Nanoparticle Monolayers

Langmuir. 2015 Apr 28;31(16):4589-92. doi: 10.1021/acs.langmuir.5b00298. Epub 2015 Apr 16.

Abstract

Colloidosomes with a hollow interior and a porous plasmonic shell are highly desired for many applications including nanoreactors, surface-enhanced Raman scattering (SERS), photothermal therapy, and controlled drug release. We herein report a silica nanosphere-templated electrostatic self-assembly in conjunction with a newly developed Ag(+) soldering to fabricate gold colloidosomes toward multifunctionality and stimuli-responsibility. The gold colloidosomes are capable of capturing a nanosized object and releasing it via structural dissociation upon responding to a biochemical input (GSH, glutathione) at a concentration close to its cellular level. In addition, the colloidosomes have a tunable nanoporous shell composed of strongly coupled gold nanoparticles, which exhibit broadened near-infrared plasmon resonance. These features along with the simplicity and high tunability of the fabrication process make the gold colloidosomes quite promising for applications in a chemical or cellular environment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Colloids / chemistry
  • Gold / chemistry*
  • Metal Nanoparticles / chemistry*
  • Particle Size
  • Porosity
  • Silver / chemistry*
  • Spectrum Analysis, Raman
  • Static Electricity
  • Surface Properties

Substances

  • Colloids
  • Silver
  • Gold