Journal
NANO LETTERS
Volume 9, Issue 12, Pages 4428-4433Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl902721z
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Funding
- Swedish Foundation
- Swedish Research Council
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We present a direct experimental comparison between the refractive index sensing capabilities of localized surface plasmon resonances (LSPRs) in gold nanodisks and propagating surface plasmon resonances (SPRs) on 50 nm gold films. The comparison is made using identical experimental conditions, and for the same resonance wavelength, lambda(SP) congruent to 700 nm. Blosensing experiments with biotin-avidin coupling reveal that the two sensing platforms have very similar performance, despite a superior bulk refractive index sensing figure of merit for the SPR sensor. The results demonstrate that LSPR sensing based on simple transmission or reflection measurements is a highly competitive technique compared to the traditional SPR sensor.
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