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American Chemical Society, Nano Letters, 8(15), p. 5068-5074, 2015

DOI: 10.1021/acs.nanolett.5b01184

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Assessing Single Upconverting Nanoparticle Luminescence by Optical Tweezers

Journal article published in 2015 by Paloma Rodriguez-Sevilla ORCID, Hector Rodriguez-Rodriguez, Marco Pedroni, Adolfo Speghini, Marco Bettinelli, Jose Antonio Garcia Sole, J. García Solé, Daniel Jaque ORCID, Patricia Haro-Gonzalez
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We report on stable, long-term immobilization and localization of a single colloidal Er(3+)/Yb(3+) codoped upconverting fluorescent nanoparticle (UCNP) by optical trapping with a single infrared laser beam. Contrary to expectations, the single UCNP emission differs from that generated by an assembly of UCNPs. The experimental data reveal that the differences can be explained in terms of modulations caused by radiation-trapping, a phenomenon not considered before but that this work reveals to be of great relevance.