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Journal Article Plasmonic Biosensor
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Authors
Hyeon-Bong Pyo, Moon Youn Jung, Seon-Hee Park
Issue Date
2007-12
Citation
BioChip Journal, v.1, no.4, pp.1-22
ISSN
1976-0280
Publisher
한국바이오칩학회
Language
English
Type
Journal Article
Project Code
07MB2700, Ubiquitous Health Monitoring Module and System Development, Park Seon Hee
Abstract
Issues on optical and physical characteristics of plasmonic biosensor were described. Starting from physical principles of surface plasmons, resonant coupling, and dispersion, we then discussed more practical and essentially important aspects on dielectric functions, penetration depth, and functional differences in SPR imaging systems. Scaling procedure from experimentally obtained SPR curve to incident angle was also discussed. Also, physical background of plasmon-resonant, extinction-, scattering- and near-field cross-section of metallic nanoparticles was briefly explained, based on Mie scattering. Extinction spectra were calculated for various sizes of gold and silver anoparticles and compared with experimentally observed extinction spectra for colloidal gold.
KSP Keywords
Colloidal gold, Cross section, Incident angle, Mie scattering, Physical characteristics, SPR curve, SPR imaging, Surface plasmon(SP), dielectric function, extinction spectra, imaging system