Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 33, Pages 22016-22022Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp03785f
Keywords
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Funding
- Swedish Research Council (VR) [2014-31612]
- Science Foundation Ireland (SFI) [15/RP/2828]
- German Research Council (German Research Foundation (DFG) [RE 1203/18-1, RE 1203/20-1]
- COST Action [CM1403]
- Science Foundation Ireland (SFI) [15/RP/2828] Funding Source: Science Foundation Ireland (SFI)
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The quantum yield is a critically important parameter in the development of lanthanide-based upconverting nanoparticles (UCNPs) for use as novel contrast agents in biological imaging and optical reporters in assays. The present work focuses on the influence of the beam profile in measuring the quantum yield (phi) of nonscattering dispersions of nonlinear upconverting probes, by establishing a relation between f and excitation light power density from a rate equation analysis. A resulting 60% correction in the measured f due to the beam profile utilized for excitation underlines the significance of the beam profile in such measurements, and its impact when comparing results from different setups and groups across the world.
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