Title :
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
fDate :
Aug. 28 2012-Sept. 1 2012
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;
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2012 Annual International Conference of the IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-4119-8
Electronic_ISBN :
1557-170X
DOI :
10.1109/EMBC.2012.6346438
