We demonstrate surface plasmon resonance (SPR) based optical trapping of quantum-dot (QD) nanoparticles suspended
in water with a bull’s eye-type plasmonic chip. The particle dynamics of QD suspensions at the laser focus was evaluated
by fluorescence correlation spectroscopy. The average transit time of QD suspensions on the plasmonic chip increased than
that on the coverslip, suggesting that single QD was more constrained at the focal spot due to optical trapping enhanced
with SPR.
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