Characterizing Optical Properties of Self-Assembled Gold Nanoparticles for Surface Plasmon Resonance Device Applications
Resource
Japanese Journal of Applied Physics 45 (9A): 6984-6986
Journal
Japanese Journal of Applied Physics
Journal Issue
45
Pages
6984-6986
Date Issued
2006
Date
2006
Author(s)
Abstract
In this study, the optical constants of gold nanoparticles are evaluated for surface plasmon-based sensor applications. Using an effective medium approximation (EMA) and ellipsometry, approaches to monitor the self-assembly of gold nanoparticles are also demonstrated. Spectroscopic ellipsometric parameters measured (tan Ψ, cos Δ) before and after adding gold nanoparticles to a substrate are used to calculate the optical constants of gold nanoparticles. The film thickness is measured by grazing incidence X-ray reflectivity (XRR). The optical constants (refractive index, extinction coefficient) of gold nanoparticles can be obtained from the measured ellipsometric parameters and thickness. We also show that particles density can be well predicted and detected nondestructively by this method. © 2006 The Japan Society of Applied Physics.
Subjects
Ellipsometric parameters; Gold-nanoparticles; Optical constants; Self-assembly; Surface plasmon resonance
Other Subjects
Approximation theory; Ellipsometry; Gold; Optical systems; Self assembly; Surface plasmon resonance; Effective medium approximation (EMA); Gold nanoparticles; Optical constants; X ray reflectivity (XRR); Nanostructured materials
Type
journal article
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