Tailored optical propulsion forces for controlled transport of resonant gold nanoparticles and associated thermal convective fluid flows.

ABSTRACT: Noble metal nanoparticles illuminated at their plasmonic resonance wavelength turn into heat nanosources. This phenomenon has prompted the development of numerous applications in science and technology. Simultaneous optical manipulation of such resonant nanoparticles could certainly extend the functionality and potential applications of optothermal tools. In this article, we experimentally demonstrate optical transport of single and multiple resonant nanoparticles (colloidal gold spheres of radius 200 nm) directed by tailored transverse phase-gradient forces propelling them around a 2D optical trap. We show how the phase-gradient force can be designed to efficiently change the speed of the nanoparticles. We have found that multiple hot nanoparticles assemble in the form of a quasi-stable g

SUBMITTER: Rodrigo JA 

PROVIDER: S-EPMC7589520 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature