Investigating nanoparticle-substrate interaction in LSPR biosensing using the image-charge theory

Daryoush Mortazavi; Abbas Z Kouzani; Akif Kaynak

doi:10.1109/EMBC.2012.6346438

Investigating nanoparticle-substrate interaction in LSPR biosensing using the image-charge theory

Annu Int Conf IEEE Eng Med Biol Soc. 2012:2012:2363-6. doi: 10.1109/EMBC.2012.6346438.

Authors

Daryoush Mortazavi¹, Abbas Z Kouzani, Akif Kaynak

Affiliation

¹ School of Engineering, Deakin University, Geelong, VIC, Australia. dmortaza@deakin.edu.au

PMID: 23366399
DOI: 10.1109/EMBC.2012.6346438

Abstract

Localized surface plasmon resonance (LSPR) has been used to develop optical biosensors. Tuning the resonance wavelength to detect target biomolecules with a particular dipolar resonance is essential when designing LSPR biosensors. In this paper, the interaction of nanoparticles (NPs) with glass substrate (SiO(2)) for LSPR wavelength is investigated using the concept of the image-charge theory. Using the FDTD method, it is shown how the NP and substrate size change the plasmon wavelength. Next, this phenomenon is interpreted using the analytical electrostatic eigenvalue method.

MeSH terms

Biopolymers / analysis*
Biosensing Techniques / instrumentation*
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Light
Models, Theoretical*
Nanoparticles / chemistry*
Nanoparticles / radiation effects
Nanoparticles / ultrastructure
Nanotechnology / instrumentation*
Scattering, Radiation
Static Electricity
Surface Plasmon Resonance / instrumentation*

Substances

Biopolymers