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Optical forces at the nanoscale: Size and electrostatic effects

Author
Rodríguez-Sevill, Paloma; Prorok, Katarzyna; Bednarkiewicz, Artur; Marqués Ponce, Manuel Ignaciountranslated; García-Martín, Antonio; García Solé, Joséuntranslated; Haro-González, Patricia; Jasque, Daniel
Entity
UAM. Departamento de Física de Materiales; UAM. Centro de Investigación en Fisica de la Materia Condensada (IFIMAC); UAM. Instituto Universitario de Ciencia de Materiales Nicolás Cabrera (INC)
Publisher
ACS Publications
Date
2017-12-12
Citation
10.1021/acs.nanolett.7b04804
Nano Letters 18.1 (2018): 602-609
 
 
 
ISSN
1530-6984 (print); 1530-6992 (online)
DOI
10.1021/acs.nanolett.7b04804
Funded by
This work has been supported by the Spanish Ministerio de Economia y Competitividad (project Nr.MAT2016-75362-C3-1-R), FIS2015-69295-C3-3-P and the “María de Maeztu” Program Ref: MDM-2014-0377. P.R.S. thanks MINECO and the Fondo Social Europeo (FSE) for the “Promoción del talento y su Empleabilidad en I+D+i” statal program (BES-2014-069410). K.P. acknowledges financial support from the National Science Center Poland (NCN) under the ETIUDA doctoral scholarship on the basis of decision number DEC-2014/12/T/ST5/00646. A.B. acknowledges the statutory financial support from ILT&SR PAS. P.H.G. thanks MINECO for the Juan de la Cierva program (IJCI-2015- 24551). The European Upconversion Network (COST Action CM1403) is acknowledged
Project
Gobierno de España. MAT2016-75362-C3-1-R; Gobierno de España. FIS2015-69295-C3-3-P; Gobierno de España. MDM-2014-0377; Gobierno de España. BES-2014-069410
Editor's Version
http://doi.org/10.1021/acs.nanolett.7b04804
Subjects
Nanoparticles; Optical trapping; Size; Zeta potential; Física
URI
http://hdl.handle.net/10486/684688
Note
“This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters copyright © American Chemical Society after peer review and technical editing by publisher. To acces final work see Optical Forces at the Nanoscale: Size and Electrostatic Effects, Nano Letters, 18.1 (2018), pags. 602-609. http://doi.org/10.1021/acs.nanolett.7b04804"
Rights
© 2017 American Chemical Society

Abstract

The reduced magnitude of the optical trapping forces exerted over sub-200 nm dielectric nanoparticles complicates their optical manipulation, hindering the development of techniques and studies based on it. Improvement of trapping capabilities for such tiny objects requires a deep understanding of the mechanisms beneath them. Traditionally, the optical forces acting on dielectric nanoparticles have been only correlated with their volume, and the size has been traditionally identified as a key parameter. However, the most recently published research results have shown that the electrostatic characteristics of a sub-100 nm dielectric particle could also play a significant role. Indeed, at present it is not clear what optical forces depend. In this work, we designed a set of experiments in order to elucidate the different mechanism and properties (i.e., size and/or electrostatic properties) that governs the magnitude of optical forces. The comparison between experimental data and numerical simulations have shown that the double layer induced at nanoparticle’s surface, not considered in the classical description of nanoparticle’s polarizability, plays a relevant role determining the magnitude of the optical forces. Here, the presented results constitute the first step toward the development of the dielectric nanoparticle over which enhanced optical forces could be exerted, enabling their optical manipulation for multiples purposes ranging from fundamental to applied studies
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Google™ Scholar:Rodríguez-Sevill, Paloma - Prorok, Katarzyna - Bednarkiewicz, Artur - Marqués Ponce, Manuel Ignacio - García-Martín, Antonio - García Solé, José - Haro-González, Patricia - Jasque, Daniel

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  • Producción científica en acceso abierto de la UAM [16606]

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Universidad Autónoma de Madrid. Biblioteca
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