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Dispersion and shape engineered plasmonic nanosensors

Jeong, Hyeon-Ho ; Mark, Andrew G ; Alarcón-Correa, Mariana ; Kim, Insook ; Oswald, Peter ; Lee, Tung-Chun ; Fischer, Peer

Nature communications, 2016-04, Vol.7 (1), p.11331-11331, Article 11331 [Periódico revisado por pares]

England: Nature Publishing Group

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Título:
Dispersion and shape engineered plasmonic nanosensors
Autor: Jeong, Hyeon-Ho ; Mark, Andrew G ; Alarcón-Correa, Mariana ; Kim, Insook ; Oswald, Peter ; Lee, Tung-Chun ; Fischer, Peer
Assuntos: Avidin - analysis ; Avidin - chemistry ; Biosensing Techniques - methods ; Biosensors ; Biotin - analysis ; Biotin - chemistry ; Engineering ; Equipment Design ; Gold - chemistry ; Metal Nanoparticles - chemistry ; Metal Nanoparticles - ultrastructure ; Nanoparticles ; Nanotubes - chemistry ; Refractometry ; Sensors ; Surface Plasmon Resonance
É parte de: Nature communications, 2016-04, Vol.7 (1), p.11331-11331, Article 11331
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
These authors contributed equally to this work.
Descrição: 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.
Editor: England: Nature Publishing Group
Idioma: Inglês

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Dispersion and shape engineered plasmonic nanosensors

Jeong, Hyeon-Ho ; Mark, Andrew G ; Alarcón-Correa, Mariana ; Kim, Insook ; Oswald, Peter ; Lee, Tung-Chun ; Fischer, Peer

England: Nature Publishing Group

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