Abstract
This paper introduces an efficient method for accumulation of particles via thermophoresis and thermal convection sustained by localized surface plasmon energy. Gold nanorods were deposited on the designated surface of a microfiber, when a 808 nm laser at an optical power of 12 mV launched into the microfiber, particles dispersed in the water were massively trapped and aggregated on the substrate. This work is envisioned to have application in photothermal cancer therapy, photothermal imaging, and targeted drug delivery.
Highlights
The ability to trap and manipulate particles by light has generated a lot of interest in the past forty years.[1,2,3] Optical tweezers based on optical gradient force can trap particles near the focus of a laser beam by using a focusing laser beam or tapered fiber,[4,5,6] but the optical force of which is usually only a few or tens of pN, it is difficult to manipulate particles in a large scale with a large number
Plasmonic photothermal accumulation of particles by a microfiber decorated with gold nanostructures
We report a method for plasmonic photothermal accumulation of particles
Summary
The ability to trap and manipulate particles by light has generated a lot of interest in the past forty years.[1,2,3] Optical tweezers based on optical gradient force can trap particles near the focus of a laser beam by using a focusing laser beam or tapered fiber,[4,5,6] but the optical force of which is usually only a few or tens of pN, it is difficult to manipulate particles in a large scale with a large number. Published Online: 21 August 2017 Ying Li, Yanjun Hu and Xingda Wu Plasmonic photothermal accumulation of particles by a microfiber decorated with gold nanostructures
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