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.

Assessing Single Upconverting Nanoparticle Luminescence by Optical Tweezers

PEDRONI, Marco;SPEGHINI, Adolfo;BETTINELLI, Marco Giovanni;
2015-01-01

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.
optical tweezers; single particle fluorescence; upconverting nanoparticle
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/928629
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