Optical force decoration of 3D microstructures with plasmonic particles

Optical forces are used to push and aggregate gold nanorods onto several substrates creating surface-enhanced Raman scattering (SERS) active hot spots for Raman-based identification of proteins. By monitoring the increase of the protein SERS signal, we observe different aggregation times for differe...

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Bibliographic Details
Published in:Optics letters 2018-10, Vol.43 (20), p.5170-5173
Main Authors: Donato, M G, Rajamanickam, V P, Foti, A, Gucciardi, P G, Liberale, C, Maragò, O M
Format: Article
Language:English
Subjects:
Agglomeration
Biological materials
Gold
Nanorods
Proteins
Raman spectra
Substrates
Three dimensional models
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Summary:Optical forces are used to push and aggregate gold nanorods onto several substrates creating surface-enhanced Raman scattering (SERS) active hot spots for Raman-based identification of proteins. By monitoring the increase of the protein SERS signal, we observe different aggregation times for different curvatures of the substrates. The slower aggregation dynamics on curved surfaces is justified by a simple geometrical model. In particular, this technique is used to decorate three-dimensional microstructures and to quickly realize hybrid micro/nanosensors for highly sensitive detection of biological material directly in a liquid environment.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.43.005170