2012•Optics ExpressOpen access

Differentiating surface and bulk interactions using localized surface plasmon resonances of gold nanorods

Neha Nehru, Eugenii U. Donev, Gazi M. Huda, Lin-Liang Yu, Yinan Wei, J. Todd Hastings

Abstract

We demonstrate a novel localized surface-plasmon resonance sensor that can distinguish surface binding interactions from interfering bulk effects. This is accomplished by utilizing the longitudinal and transverse plasmon modes of gold nanorods. We have investigated, both numerically and experimentally, the effect of change in background refractive index and surface binding on the two resonances of a gold nanorod on an indium tin oxide coated glass substrate.

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Available abstract

Key concepts: Nanorod, Surface plasmon resonance, Materials science, Surface plasmon, Refractive index, Localized surface plasmon, Indium tin oxide, Plasmon