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Upconversion nanoparticles (UCNPs) are of high interest for biosensing because of their unique near‐infrared‐excitation and visible‐emission features. An emerging field within UCNP biosensing is the detection of biological interactions through Förster resonance energy transfer (FRET). However, the relatively large size, the distribution of emitting lanthanide ions within the nanoparticle, the unknown...
Bioimaging is an important tool for investigation and visualization of biological phenomena and as diagnostic tool in medicine. In this context upconverting Gd2O3:Er3+, Yb3+ nanostructures (nanoparticles, nanorods) have been synthesized and investigated with regard to potential biomedical applications. Besides size and morphology effect on cytotoxic behavior, the influence of PEG-b-PAAc surface modification...
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