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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