Journal
NANO LETTERS
Volume 10, Issue 3, Pages 1006-1011Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl904168f
Keywords
Localized surface plasmon resonance; plasmonic dipole antennas; optical trapping; nanosensors
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Funding
- Swiss National Science Foundation [200021-113735]
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The Optical trapping of Au nanoparticles with dimensions as small as 10 nm in the gap of plasmonic dipole antennas is demonstrated. Single nanoparticle trapping events are recorded in real time by monitoring the Rayleigh scattering spectra of individual plasmonic antennas. Numerical simulations are also performed to interpret the experimental results, indicating the possibility to trap nanoparticles only a few nanometers in size. This work unveils the potential associated with the integration of plasmonic trapping with localized surface plasmon resonance based sensing techniques, in order to deliver analyte to specific, highly sensitive regions (hot spots).
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