Binary temporal upconversion codes of Mn2+-activated nanoparticles for multilevel anti-counterfeiting
Year: 2017
Type: article
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 Mn 2+ upconversion emission and relatively short-lived lanthanide upconversion emission in a particulate platform allows the generation of binary temporal codes for efficient data encoding. Precise control of the particle’s structure allows the excitation feasible both under 980 and 808 nm irradiation. We find that the as-prepared Mn 2+ -doped nanoparticles are especially useful for multilevel anti-counterfeiting with high-throughput rate of authentication and without the need for complex time-gated decoding instrumentation.
Source: Nature Communications
Authors: Xiaowang Liu, Yu Wang, Xiyan Li, Zhigao Yi, Renren Deng, Liangliang Liang, Xiaoji Xie, Daniel T. B. Loong, Shuyan Song, Dianyuan Fan, Angelo H. All, Hongjie Zhang, Ling Huang, Xiaogang Liu
Institutions: Agency for Science, Technology and Research, National University of Singapore, Shenzhen University, Institute of Materials Research and Engineering, Nanjing Tech University, The Synergetic Innovation Center for Advanced Materials, Chinese Academy of Sciences, Changchun Institute of Applied Chemistry, State Key Laboratory of Rare Earth Resources Utilization, Johns Hopkins University, Johns Hopkins Medicine
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,990
OpenAlex ID: W2762358200