Optical force decoration of 3D microstructures with plasmonic particles

M. G. Donato, Vijayakumar Palanisamy Rajamanickam, A. Foti, P. G. Gucciardi, Carlo Liberale, O. M. Maragò*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

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.
Original languageEnglish (US)
Pages (from-to)5170
JournalOptics Letters
Volume43
Issue number20
DOIs
StatePublished - Oct 15 2018

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