Abstract
We investigate a technique for microparticle aggregation via optical fiber-excited localized surface plasmon resonance of gold nanorods, which were deposited on the designated surface of a tapered optical fiber (TOF). Through the enhanced photothermal effect, a microbubble forms on the TOF at an input optical power of 14 mW. Marangoni convection transports the microparticles dispersed in water to the bubble, where they accumulate on the gold nanorod surface because of strong optical gradient force.
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