Surface plasmon resonance and surface-enhanced Raman scattering sensing enabled by digital versatile discs
2012; American Institute of Physics; Volume: 100; Issue: 4 Linguagem: Inglês
10.1063/1.3679682
ISSN1520-8842
AutoresXuan Dou, Pei-Yu Chung, Peng Jiang, Jianli Dai,
Tópico(s)Advanced biosensing and bioanalysis techniques
ResumoWe report the simultaneous achievement of sensitive surface plasmon resonance (SPR) and surface-enhanced Raman scattering (SERS) sensing using digital versatile discs (DVDs). The aluminum-covered data tracks of DVDs can efficiently concentrate local electromagnetic field, resulting in an excellent SPR medium (with sensitivity of ∼850 nm per refractive index unit which is higher than that of most available nanofabricated plasmonic substrates) with a small but measurable SERS enhancement. The SPR sensitivity and the optical spectra, as well as the distribution of electric field amplitude, are simulated using a finite-difference time-domain model. The theoretical predictions agree reasonably well with the experimental results.
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