TitleDependence of the signal amplification potential of colloidal gold nanoparticles on resonance wavelength in surface plasmon resonance-based detection.
Publication TypeJournal Article
Year of Publication2007
AuthorsFu, E, Ramsey, SA, Yager, P
JournalAnal Chim Acta
Date Published2007 Sep 05
KeywordsAdsorption, Chromium, Cysteamine, Gold, Gold Colloid, Nanoparticles, Surface Plasmon Resonance

We demonstrate the resonance wavelength-dependent signal of colloidal gold nanoparticles adsorbed to a planar gold surface in surface plasmon resonance (SPR)-based detection. Experimental measurements of the SPR signal as a function of particle surface coverage are presented for three different resonance wavelengths. The SPR signal due to the colloidal gold nanoparticles varies across the resonance wavelengths of 650 nm, 770 nm, and 920 nm. The experimental SPR curves show good agreement with the results of a Lorentz absorbance model at the lower particle surface coverages investigated. The results demonstrate an almost twofold signal difference for a subset of the experimental conditions explored.

Alternate JournalAnal Chim Acta
PubMed ID17765071
PubMed Central IDPMC2267912
Grant ListU01 DE014971 / DE / NIDCR NIH HHS / United States
U01 DE014971-04 / DE / NIDCR NIH HHS / United States
1U01 DE014971 / DE / NIDCR NIH HHS / United States