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Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

The possibility to generate and measure rotation and torque at the nanoscale is of fundamental interest to the study and application of biological and artificial nanomotors and may provide new routes towards single cell analysis, studies of non-equilibrium thermodynamics, and mechanical actuation of...

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Autores principales: Andrén, Daniel, Karpinski, Pawel, Käll, Mikael
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MyJove Corporation 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6102027/
https://www.ncbi.nlm.nih.gov/pubmed/30010664
http://dx.doi.org/10.3791/57947
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author Andrén, Daniel
Karpinski, Pawel
Käll, Mikael
author_facet Andrén, Daniel
Karpinski, Pawel
Käll, Mikael
author_sort Andrén, Daniel
collection PubMed
description The possibility to generate and measure rotation and torque at the nanoscale is of fundamental interest to the study and application of biological and artificial nanomotors and may provide new routes towards single cell analysis, studies of non-equilibrium thermodynamics, and mechanical actuation of nanoscale systems. A facile way to drive rotation is to use focused circularly polarized laser light in optical tweezers. Using this approach, metallic nanoparticles can be operated as highly efficient scattering-driven rotary motors spinning at unprecedented rotation frequencies in water. In this protocol, we outline the construction and operation of circularly-polarized optical tweezers for nanoparticle rotation and describe the instrumentation needed for recording the Brownian dynamics and Rayleigh scattering of the trapped particle. The rotational motion and the scattering spectra provides independent information on the properties of the nanoparticle and its immediate environment. The experimental platform has proven useful as a nanoscopic gauge of viscosity and local temperature, for tracking morphological changes of nanorods and molecular coatings, and as a transducer and probe of photothermal and thermodynamic processes.
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spelling pubmed-61020272018-09-05 Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System Andrén, Daniel Karpinski, Pawel Käll, Mikael J Vis Exp Engineering The possibility to generate and measure rotation and torque at the nanoscale is of fundamental interest to the study and application of biological and artificial nanomotors and may provide new routes towards single cell analysis, studies of non-equilibrium thermodynamics, and mechanical actuation of nanoscale systems. A facile way to drive rotation is to use focused circularly polarized laser light in optical tweezers. Using this approach, metallic nanoparticles can be operated as highly efficient scattering-driven rotary motors spinning at unprecedented rotation frequencies in water. In this protocol, we outline the construction and operation of circularly-polarized optical tweezers for nanoparticle rotation and describe the instrumentation needed for recording the Brownian dynamics and Rayleigh scattering of the trapped particle. The rotational motion and the scattering spectra provides independent information on the properties of the nanoparticle and its immediate environment. The experimental platform has proven useful as a nanoscopic gauge of viscosity and local temperature, for tracking morphological changes of nanorods and molecular coatings, and as a transducer and probe of photothermal and thermodynamic processes. MyJove Corporation 2018-06-30 /pmc/articles/PMC6102027/ /pubmed/30010664 http://dx.doi.org/10.3791/57947 Text en Copyright © 2018, Journal of Visualized Experiments http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visithttp://creativecommons.org/licenses/by-nc-nd/3.0/
spellingShingle Engineering
Andrén, Daniel
Karpinski, Pawel
Käll, Mikael
Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
title Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
title_full Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
title_fullStr Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
title_full_unstemmed Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
title_short Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
title_sort construction and operation of a light-driven gold nanorod rotary motor system
topic Engineering
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6102027/
https://www.ncbi.nlm.nih.gov/pubmed/30010664
http://dx.doi.org/10.3791/57947
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