Immobilizing Au nanoparticles on SiO2 surfaces using octadecylsiloxane monolayers

Roland Resch, Sheffer Meltzer, Thomas Vallant, Helmuth Hoffmann, Bruce E. Koel, Anupam Madhukar, Aristides A.G. Requicha, Peter Will

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Gold nanoparticles were immobilized on silicon dioxide (SiO2) surfaces by embedding them in a layer of octadecylsiloxane (ODS) and also in SiO2 layers created by deposition and oxidation of ODS layers. The ODS and the SiO2 layers form selectively around the nanoparticles. Analysis of the particles after several deposition/oxidation cycles showed a decrease in measured height in accordance with the number of deposited layers. Following one embedding cycle, the nanoparticles could not be moved with the tip of a scanning force microscope operated in dynamic mode, whereas they moved in a controlled fashion prior to the deposition of any layer. Depositing a second set of particles onto an ODS layer in contact with the substrate allowed us to construct a two-particle column by placing one particle directly on top of another one.

Original languageEnglish (US)
Pages (from-to)5666-5670
Number of pages5
JournalLangmuir
Volume17
Issue number18
DOIs
StatePublished - Sep 4 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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