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- W2079308957 abstract "Localized surface-plasmon resonance (LSPR) sensors are typically based on tracing resonance peak shifts that precisely follow changes in the local refractive index. Such measurements usually require a spectrometer, a stable light source, and an accurate LSPR position tracing technique. As a simple but efficient alternative, we investigated a self-referenced single-wavelength sensing scheme based on angle-dependent and highly directional radiation patterns originating from a monolayer of asymmetric gold nanodimers. We found that one could easily trace a model biotin–neutravidin recognition reaction as well as minute bulk refractive index changes, by measuring the intensity ratio between the light scattered in two different directions with respect to the dimers. The refractometric resolution of the methodology was estimated to be on the order of Δn ≈ 10–5 RIU. These results may be particularly useful for label-free biosensing applications that require a combination of simple and cost-effective optical readout with a reasonable sensitivity." @default.
- W2079308957 created "2016-06-24" @default.
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- W2079308957 date "2014-08-28" @default.
- W2079308957 modified "2023-09-24" @default.
- W2079308957 title "Directional Nanoplasmonic Antennas for Self-Referenced Refractometric Molecular Analysis" @default.
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- W2079308957 doi "https://doi.org/10.1021/jp5064929" @default.
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