The charging of persistent luminescence using an infrared laser as a power source and an
upconversion process is a recently proposed trend in the field of persistent luminescence …

Upconversion nanoparticles are a promising class of materials for bioimaging. Their
attractive optical properties are influenced by their crystalline phase, size, and morphology …

Perfluorooctane sulfonate (PFOS) known as a persistent organic pollutant has been
attracting great interests due to its potential ecotoxicity. An approach capable of sensing …

Lateral flow assays (LFAs) have attracted much attention as rapid and affordable point-of-
care devices for medical diagnostics. The global SARS-CoV-2 pandemic has further …

Fluorescence correlation spectroscopy based on upconverting nanoparticles (UCNPs) can
detect single particles in strongly autofluorescent samples, such as plasma. Nanoparticle …

Background and aims Upconverting nanoparticles (UCNPs) are attractive reporters for
immunoassays due to their excellent detectability. Assays sensitive enough to measure …

Aqueous solutions are the basis for most biomedical assays, but they quench the
upconversion luminescence significantly. Surface modifications of upconverting …

The mechanism for red upconversion luminescence of Yb–Er codoped materials is not
generally agreed on in the literature. Both two-photon and three-photon processes have …

Abstract Series of Yb 3+/Ho 3+(Er 3+)/Ce 3+ co-doped NaBiF 4 phosphors were synthesized
through an ultrafast co-precipitation reaction technique at room temperature. The effect of …

Upconverting nanoparticles (UCNPs) are attractive reporters in immunoassays because of
their outstanding detectability. However, non-specific binding of antibody-UCNP conjugates …