Lanthanide-based upconversion nanomaterials have recently attracted considerable
attention in both fundamental research and various frontier applications owing to their …

The attractive features of lanthanide-doped upconversion luminescence (UCL), such as high
photostability, nonphotobleaching or photoblinking, and large anti-Stokes shift, have shown …

Smart control of photon upconversion is a key strategy for lanthanide-based materials used
in biological and photonic applications. However, this has remained a challenge for the …

Luminescence lifetime imaging has exhibited significant advantages over traditional optical
imaging in terms of precise quantification detection because of the intrinsic stability of …

Light in the near‐infrared (NIR) spectral region is increasingly utilized in bioapplications,
providing deeper penetration in biological tissues owing to the lower absorption and …

Upconversion nanocrystals have been extensively investigated for optical imaging and
biomedical applications,. However, their photoluminescence is strongly attenuated by …

Fluorescent bioimaging in the second near‐infrared window (NIR‐II) can probe deep tissue
with minimum auto‐fluorescence and tissue scattering. However, current NIR‐II fluorophore …

Manipulating topological arrangement is a powerful tool for tuning energy migration in
natural photosynthetic proteins and artificial polymers. Here, we report an inorganic optical …

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

Lanthanide ions doped upconversion nanoparticles (UCNPs) are capable of stepwisely
converting lower energy near-infrared (NIR) excitation light into higher energy visible or …