Melle Hernández, SoniaGómez Calderón, ÓscarLaurenti, MarcoMéndez González, DiegoEgatz-Gómez, AnaLópez Cabarcos, EnriqueCabrera Granado, EduardoDíaz García, ElenaRubio Retama, Jorge2023-06-172023-06-172018-051932-7447https://hdl.handle.net/20.500.14352/12210Submitted on 25 May 2018Förster resonant energy transfer (FRET) with upconverting nanoparticles (UCNPs) as donors and quantum dots (QDs) as acceptors has been regarded as a promising tool for biosensing applications. In this work, we use time-resolved fluorescence spectroscopy to analyze the UCNP-to-QD FRET and we focus on the most relevant parameter of the FRET phenomenon, UCNP-QD distance. This distance is controlled by a nanometric silica shell around the UCNP surface. We theoretically reproduce the experimental results applying FRET theory to the distribution of emitting erbium ions in the UCNP. This simple model allows us to estimate the contribution of every erbium ion to the final FRET response and to explore different strategies to improve FRET efficiency.engjournal articlehttps://arxiv.org/pdf/1805.10068.pdfopen access539.2:620.1530.145Förster resonance energy transferUpconversionQuantum dotÓptica (Física)PartículasTeoría de los quanta2209.19 Óptica Física2208 Nucleónica2210.23 Teoría Cuántica