Optical trapping of NaYF4:Er3+,Yb3+ upconverting fluorescent nanoparticles

Martinez Maestro, L ORCID: https://orcid.org/0000-0001-6629-5313, Haro-Gonzalez, P, del Rosal, B, Martin Rodriguez, E, Naccache, R, Cappobianco, JA, Dholakia, K, Garcia Sole, J and Jaque, D 2013, 'Optical trapping of NaYF4:Er3+,Yb3+ upconverting fluorescent nanoparticles' , Nanoscale, 5 (24) .

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Abstract

We report on the first experimental observation of stable optical trapping of dielectric NaYF4:Er3+,Yb3+ upconverting fluorescent nanoparticles (∼26 nm in diameter) using a continuous wave 980 nm single-beam laser. The laser serves both to optically trap and to excite visible luminescence from the nanoparticles. Sequential loading of individual nanoparticles into the trap is observed from the analysis of the emitted luminescence. We demonstrate that the trapping strength and the number of individual nanoparticles trapped are dictated by both the laser power and nanoparticle density. The possible contribution of thermal effects has been investigated by performing trapping experiment in both heavy water and into distilled water. For the case of heavy water, thermal gradients are negligible and optical forces dominate the trap loading behaviour. The results provide a promising path towards real three dimensional manipulation of single NaYF4:Er3+,Yb3+ nanoparticles for precise fluorescence sensing in biophotonics experiments.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Nanoscale
Publisher: The Royal Society of Chemistry
ISSN: 2040-3364
Related URLs:
Funders: Universidad Aut´onoma de Madrid, Comounidad Autonoma de Madrid, Spanish Ministerio de Educacion y Ciencia, Fundaci´on Dr Manuel Morales, Spanish Ministerio de Economia y competitividad, Royal Society, Concordia University, Natural Science and Engineering Research Council (NSERC) of Canada, Marie Curie Fellowship Program
Depositing User: L Martinez Maestro
Date Deposited: 10 Dec 2019 10:18
Last Modified: 03 Jan 2020 15:53
URI: http://usir.salford.ac.uk/id/eprint/53261

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