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Sensors 2014, 14(6), 10497-10513;

Simulation and Implementation of a Morphology-Tuned Gold Nano-Islands Integrated Plasmonic Sensor

Optical Bio-Microsystems Laboratory, Department of Mechanical and Industrial Engineering, Concordia University, Montreal H3G 1M8, Canada
Author to whom correspondence should be addressed.
Received: 12 April 2014 / Revised: 24 May 2014 / Accepted: 9 June 2014 / Published: 13 June 2014
(This article belongs to the Special Issue Opto-Microfluidics for Bio Applications)
Full-Text   |   PDF [1111 KB, uploaded 21 June 2014]


This work presents simulation, analysis and implementation of morphology tuning of gold nano-island structures deposited by a novel convective assembly technique. The gold nano-islands were simulated using 3D Finite-Difference Time-Domain (FDTD) techniques to investigate the effect of morphological changes and adsorption of protein layers on the localized surface plasmon resonance (LSPR) properties. Gold nano-island structures were deposited on glass substrates by a novel and low-cost convective assembly process. The structure formed by an uncontrolled deposition method resulted in a nano-cluster morphology, which was annealed at various temperatures to tune the optical absorbance properties by transforming the nano-clusters to a nano-island morphology by modifying the structural shape and interparticle separation distances. The dependence of the size and the interparticle separation distance of the nano-islands on the LSPR properties were analyzed in the simulation. The effect of adsorption of protein layer on the nano-island structures was simulated and a relation between the thickness and the refractive index of the protein layer on the LSPR peak was presented. Further, the sensitivity of the gold nano-island integrated sensor against refractive index was computed and compared with the experimental results. View Full-Text
Keywords: LSPR; gold nano-islands; biosensor; FDTD LSPR; gold nano-islands; biosensor; FDTD
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Ozhikandathil, J.; Packirisamy, M. Simulation and Implementation of a Morphology-Tuned Gold Nano-Islands Integrated Plasmonic Sensor. Sensors 2014, 14, 10497-10513.

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