Binary temporal upconversion codes of Mn²⁺-activated nanoparticles for multilevel anti-counterfeiting.

ABSTRACT: Optical characteristics of luminescent materials, such as emission profile and lifetime, play an important role in their applications in optical data storage, document security, diagnostics, and therapeutics. Lanthanide-doped upconversion nanoparticles are particularly suitable for such applications due to their inherent optical properties, including large anti-Stokes shift, distinguishable spectroscopic fingerprint, and long luminescence lifetime. However, conventional upconversion nanoparticles have a limited capacity for information storage or complexity to prevent counterfeiting. Here, we demonstrate that integration of long-lived Mn²⁺ upconversion emission and relatively short-lived lanthanide upconversion emission in a particulate platform allows the generation of binary t

SUBMITTER: Liu X 

PROVIDER: S-EPMC5638907 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature