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  Dispersion and shape engineered plasmonic nanosensors

Jeong, H. H., Mark, A. G., Alarcon-Correa, M., Kim, I., Oswald, P., Lee, T. C., et al. (2016). Dispersion and shape engineered plasmonic nanosensors. Nature Communications, 7: 11331, pp. 1-7. doi:10.1038/ncomms11331.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000B-110E-3 Version Permalink: https://hdl.handle.net/21.11116/0000-000B-110F-2
Genre: Journal Article

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 Creators:
Jeong, H. H., Author
Mark, Andrew G., Author
Alarcon-Correa, Mariana, Author
Kim, Insook, Author
Oswald, Peter, Author
Lee, T. C., Author
Fischer, Peer1, Author           
Affiliations:
1Optical Nanoscopy, Max Planck Institute for Medical Research, Max Planck Society, ou_2364730              

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 Abstract: Biosensors based on the localized surface plasmon resonance (LSPR) of individual metallic nanoparticles promise to deliver modular, low-cost sensing with high-detection thresholds. However, they continue to suffer from relatively low sensitivity and figures of merit (FOMs). Herein we introduce the idea of sensitivity enhancement of LSPR sensors through engineering of the material dispersion function. Employing dispersion and shape engineering of chiral nanoparticles leads to remarkable refractive index sensitivities (1,091 nm RIU(-1) at λ=921 nm) and FOMs (>2,800 RIU(-1)). A key feature is that the polarization-dependent extinction of the nanoparticles is now characterized by rich spectral features, including bipolar peaks and nulls, suitable for tracking refractive index changes. This sensing modality offers strong optical contrast even in the presence of highly absorbing media, an important consideration for use in complex biological media with limited transmission. The technique is sensitive to surface-specific binding events which we demonstrate through biotin-avidin surface coupling.

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 Dates: 2015-10-272016-03-162016-04-19
 Publication Status: Published online
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/ncomms11331
BibTex Citekey: 2016jeong2
URI: https://pubmed.ncbi.nlm.nih.gov/27090866/
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 7 Sequence Number: 11331 Start / End Page: 1 - 7 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723