Optical force decoration of 3D microstructures with plasmonic particles

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.

Citation
Donato MG, Rajamanickam VP, Foti A, Gucciardi PG, Liberale C, et al. (2018) Optical force decoration of 3D microstructures with plasmonic particles. Optics Letters 43: 5170. Available: http://dx.doi.org/10.1364/ol.43.005170.

Publisher
The Optical Society

Journal
Optics Letters

DOI
10.1364/ol.43.005170

Additional Links
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-43-20-5170

Permanent link to this record