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Iron oxide-induced thermal effects on solid-state upconversion emissions in NaYF4:Yb,Er nanocrystals

Challenor, M., Gong, P., Lorenser, D., Fitzgerald, M., Dunlop, S., Sampson, David and Swaminathan Iyer, K. (2013) Iron oxide-induced thermal effects on solid-state upconversion emissions in NaYF4:Yb,Er nanocrystals ACS Applied Materials and Interfaces, 5 (16). pp. 7875-7880.

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Multifunctional materials exhibiting photon upconversion show promising applications for biological imaging and sensing. In this study, we examine the solid-state upconversion emission of NaYF4:Yb,Er nanoparticles in the presence of iron oxide nanoparticles. Fe3O4 nanoparticles (6 nm) were mixed with NaYF4:Yb,Er nanoparticles (either 10 or 50 nm) in varying proportions by drying chloroform solutions of nanoparticles onto glass slides. Upconversion spectra were acquired, and a laser power-dependent emission was observed and correlated with the iron oxide content in the mixture. Changes in the lattice temperature of the upconverting particles were monitored by careful observation of the relative intensities of the 2H11/2 and 4S3/2 → 4I15/2 transitions. The emission characteristics observed are consistent with an iron oxide-induced thermal effect that is dependent on both the laser power and the proportion of iron oxide. The results highlight that the thermal effects of mixed nanoparticle systems should be considered in the design of luminescent upconverting hybrid materials.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences
Faculty of Health and Medical Sciences
Authors :
Challenor, M.
Gong, P.
Lorenser, D.
Fitzgerald, M.
Dunlop, S.
Swaminathan Iyer, K.
Date : 2013
DOI : 10.1021/am401837h
Uncontrolled Keywords : magnetite, nanoparticles, quenching, sensing, temperature, upconversion, Emission characteristics, Iron oxide nanoparticle, Lattice temperatures, Multi-functional materials, Photon up conversions, sensing, Up-conversion, Up-conversion emission, Biological materials, Erbium, Hybrid materials, Iron oxides, Magnetite, Nanoparticles, Quenching, Temperature, Ytterbium, Magnetite nanoparticles, ferric ion, ferric oxide, fluoride, luminescent agent, nanoparticle, sodium yttriumtetrafluoride, yttrium, ferric ion, fluoride, nanoparticle, yttrium, article, chemistry, photon, chemistry, Ferric Compounds, Fluorides, Luminescent Agents, Nanoparticles, Photons, Yttrium, Ferric Compounds, Fluorides, Luminescent Agents, Nanoparticles, Photons, Yttrium
Depositing User : Maria Rodriguez-Marquez
Date Deposited : 05 Jun 2018 09:29
Last Modified : 19 Sep 2018 11:32

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