Impurity doping is a promising method to impart new properties to various materials. Due to
their unique optical, magnetic, and electrical properties, rare-earth ions have been …

Research related to the development and application of luminescent nanoparticles (LNPs)
for chemical and biological analysis and imaging is flourishing. Novel materials and new …

This is the first comprehensive review on methods and materials for use in optical sensing of
pH values and on applications of such sensors. The Review starts with an introduction that …

A comprehensive review on the development and state of the art of colorimetric and
fluorometric sensor arrays is presented. Chemical sensing aims to detect subtle changes in …

The detection of cancer biomarkers in histological samples and blood is of paramount
importance for clinical diagnosis. Current methods are limited in terms of sensitivity …

Exploring and understanding biological and pathological changes are of great significance
for early diagnosis and therapy of diseases. Optical sensing and imaging approaches have …

Upconversion is a nonlinear optical phenomenon that involves the emission of high‐energy
photons by sequential absorption of two or more low‐energy excitation photons. Due to their …

Significant progress on upconversion‐nanoparticle (UCNP)‐based probes is witnessed in
recent years. Compared with traditional fluorescent probes (eg, organic dyes, metal …

Lanthanide-doped upconversion nanoparticles enable anti-Stokes emission via nonlinear
processes, where low-energy excitation photons in the near-infrared window can be …

Upconversion nanoparticles (UCNPs) have been frequently applied in Förster resonance
energy transfer (FRET) bioanalysis. However, the understanding of how surface coatings …