Direct measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator

Abstract Optical tweezers based on optical radiation pressure are widely used to manipulate nanoscale to microscale particles. This study demonstrates direct measurement of the optical force gradient distribution acting on a polystyrene (PS) microsphere using a carbon nanotube (CNT) mechanical reson...

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Autores principales:	Masaaki Yasuda, Kuniharu Takei, Takayuki Arie, Seiji Akita
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/113cb51e30ab44208f2fb531849e46b2
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spelling	oai:doaj.org-article:113cb51e30ab44208f2fb531849e46b22021-12-02T12:30:12ZDirect measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator10.1038/s41598-017-03068-22045-2322https://doaj.org/article/113cb51e30ab44208f2fb531849e46b22017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03068-2https://doaj.org/toc/2045-2322Abstract Optical tweezers based on optical radiation pressure are widely used to manipulate nanoscale to microscale particles. This study demonstrates direct measurement of the optical force gradient distribution acting on a polystyrene (PS) microsphere using a carbon nanotube (CNT) mechanical resonator, where a PS microsphere with 3 μm diameter is welded at the CNT tip using laser heating. With the CNT mechanical resonator with PS microsphere, we measured the distribution of optical force gradient with resolution near the thermal noise limit of 0.02 pN/μm in vacuum, in which condition enables us to high accuracy measurement using the CNT mechanical resonator because of reduced mechanical damping from surrounding fluid. The obtained force gradient and the force gradient distribution agree well with theoretical values calculated using Lorenz–Mie theory.Masaaki YasudaKuniharu TakeiTakayuki ArieSeiji AkitaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Masaaki Yasuda Kuniharu Takei Takayuki Arie Seiji Akita Direct measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator
description	Abstract Optical tweezers based on optical radiation pressure are widely used to manipulate nanoscale to microscale particles. This study demonstrates direct measurement of the optical force gradient distribution acting on a polystyrene (PS) microsphere using a carbon nanotube (CNT) mechanical resonator, where a PS microsphere with 3 μm diameter is welded at the CNT tip using laser heating. With the CNT mechanical resonator with PS microsphere, we measured the distribution of optical force gradient with resolution near the thermal noise limit of 0.02 pN/μm in vacuum, in which condition enables us to high accuracy measurement using the CNT mechanical resonator because of reduced mechanical damping from surrounding fluid. The obtained force gradient and the force gradient distribution agree well with theoretical values calculated using Lorenz–Mie theory.
format	article
author	Masaaki Yasuda Kuniharu Takei Takayuki Arie Seiji Akita
author_facet	Masaaki Yasuda Kuniharu Takei Takayuki Arie Seiji Akita
author_sort	Masaaki Yasuda
title	Direct measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator
title_short	Direct measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator
title_full	Direct measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator
title_fullStr	Direct measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator
title_full_unstemmed	Direct measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator
title_sort	direct measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/113cb51e30ab44208f2fb531849e46b2
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Direct measurement of optical trapping force gradient on polystyrene microspheres using a carbon nanotube mechanical resonator

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