Immobilization of gold nanoparticles on silanized substrate for sensors based on localized surface plasmon resonance

Shuji Taue, Koji Nishida, Hiroyuki Sakaue, Takayuki Takahagi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We propose a detailed method of preparing immobilized gold nanoparticles on a substrate for application to dielectric sensors. We show the relationship between the amount of aminofunctional silane on the substrate and the absorbance caused by localized surface plasmon resonance of the gold nanoparticles. The amount of silane was changed by controlling rinsing time with distilled water. In the rinsing process, two features of dispersion for isolated nanoparticles on the substrate were observed. One was a high density of nanoparticles, but with some of them incompletely isolated; the other was a low density of nanoparticles, but all completely isolated. To confirm the suitability for sensor applications, we measured the absorption spectra of the substrates surrounding media of various dielectric constants.

Original languageEnglish
Pages (from-to)74-79
Number of pages6
Journale-Journal of Surface Science and Nanotechnology
Volume5
DOIs
Publication statusPublished - Mar 1 2007

Keywords

  • Adhesion
  • Nanoparticles
  • Scanning electron microscopy (SEM)
  • Visible/ultraviolet absorption spectroscopy
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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