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

Author

Mortazavi, D. ; Kouzani, Abbas Z. ; Kaynak, Akif

Author_Institution

Sch. of Eng., Deakin Univ., Geelong, VIC, Australia

fYear

2012

fDate

Aug. 28 2012-Sept. 1 2012

Firstpage

2363

Lastpage

2366

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 (SiO₂) 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.

Keywords

biosensors; eigenvalues and eigenfunctions; nanoparticles; surface plasmon resonance; LSPR biosensing; analytical electrostatic eigenvalue method; dipolar resonance; image charge theory; localized surface plasmon resonance; nanoparticle-substrate interaction; optical biosensor; resonance wavelength; target biomolecules; Biosensors; Glass; Permittivity; Plasmons; Shape; Substrates; Surface waves; Biopolymers; Biosensing Techniques; Computer Simulation; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Light; Models, Theoretical; Nanoparticles; Nanotechnology; Scattering, Radiation; Static Electricity; Surface Plasmon Resonance;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society (EMBC), 2012 Annual International Conference of the IEEE

Conference_Location

San Diego, CA

ISSN

1557-170X

Print_ISBN

978-1-4244-4119-8

Electronic_ISBN

1557-170X

Type

conf

DOI

10.1109/EMBC.2012.6346438

Filename

6346438