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Sensors 2014, 14(6), 10497-10513; doi:10.3390/s140610497
Article

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

*  and
Received: 12 April 2014; in revised form: 24 May 2014 / Accepted: 9 June 2014 / Published: 13 June 2014
(This article belongs to the Special Issue Opto-Microfluidics for Bio Applications)
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Abstract: 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.
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 which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

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

AMA Style

Ozhikandathil J, Packirisamy M. Simulation and Implementation of a Morphology-Tuned Gold Nano-Islands Integrated Plasmonic Sensor. Sensors. 2014; 14(6):10497-10513.

Chicago/Turabian Style

Ozhikandathil, Jayan; Packirisamy, Muthukumaran. 2014. "Simulation and Implementation of a Morphology-Tuned Gold Nano-Islands Integrated Plasmonic Sensor." Sensors 14, no. 6: 10497-10513.


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