journal article·2019-08-21

Dual-Mode Long-Lived Luminescence of Mn2+-Doped Nanoparticles for Multilevel Anticounterfeiting

Xiaowang Liu, Qiang Ji, Qiyan Hu, Chen Li, Meiling Chen, Jian Sun, Yu Wang, Qiang Sun, Baoyou Geng

ACS Applied Materials & Interfaces· Volume 11· Issue 33
Publisher page

Abstract

Luminescent nanoparticles with dual-mode long-lived luminescence are of great importance for their attractive applications in biosensing, bioimaging, and data encoding. Herein, we report the realization of up- and downconversion emission of Mn2+ dopants in multilayer nanoparticles of NaGdF4:Yb/Tm@NaGdF4:Ce/Mn@NaYF4 upon excitation at 980 and 254 nm, respectively. The dual-mode emission of the Mn2+ dopants at 531 nm have a long-lived lifetime up to ∼30 ms as a result of the spin-forbidden optical transition of Mn2+ within the 3d5 configuration. After ceasing steady excitation at the two wavelengths, the long-lived feature of Mn2+ luminescence allows a longer persistent time than lanthanide emissions, thereby enabling the ease of data decoding by a cell phone camera under a burst mode. The long-lived green upconversion emission also permits the generation of a long green tail emission upon dynamic excitation at 980 nm. These attributes make the as-prepared Mn2+-doped multilayer nanoparticles particularly attractive for multilevel anticounterfeiting.
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Research context

OpenAlex topics: Luminescence Properties of Advanced Materials · Luminescence and Fluorescent Materials · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Centre for Nano Science and Technology, Anhui Normal University, Wuhu 241000, P. R. China

School of Pharmacy, Wannan Medical College, Wuhu 241002, P. R. China

Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P. R. China

Center for Functional Materials, NUS (Suzhou) Research Institute, Suzhou, Jiangsu 215123, P. R. China

Funding

National Natural Science Foundation of China · Science and Technology Project of Shenzhen · Natural Science Foundation of Anhui Province for Distinguished Youth

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