Electrochemical lithium doping of Cu_2−xS nanocrystal assemblies for tuning their near infrared absorbance

Abstract

The charge carrier density of copper sulfide nanocrystals (Cu2-xS NCs) is sensitive to variations in the atomic composition, which determines the nature of sulfur bonding (sulfur-to-sulfur bonding or copper-to-sulfur bonding)...

Photodarkening, Photobrightening, and the Role of Color Centers in Emerging Applications of Lanthanide-Based Upconverting Nanomaterials

“…A primary theme is the realization of all-inorganic photoswitchability, with Ln-doped nanoparticles providing a new framework for such capabilities. Notably, this material system overcomes the innate drawbacks of existing organic photoswitches such as photoinstability and photobleaching and is now leading to, for example, single-molecule localization imaging with subangstrom localization accuracies and high-density optical data storage (127). Looking forward, we expect that the robust reversibility and optical controllability offered by PD and photobrightening should enable other uses, particularly when combined with recent advances in UCNP synthesis strategies.…”

“…Beyond the simple recovery of optical performance following degradation, harnessing the ability to photobrighten opens avenues for new applications. These include high-density optical memory (124)(125)(126) and photoswitchable nanocrystals for superresolution imaging and sensing (127), which are described in more detail in Section 4.3.…”