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Near‐Infrared‐Emitting Two‐Dimensional Codes Based on Lattice‐Strained Core/(Doped) Shell Quantum Dots with Long Fluorescence Lifetime
Author(s) -
Chen Chi,
Zhang Pengfei,
Gao Guanhui,
Gao Duyang,
Yang Yong,
Liu Hong,
Wang Yuhui,
Gong Ping,
Cai Lintao
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201402369
Subject(s) - quantum dot , fluorescence , materials science , infrared , optoelectronics , embedding , cadmium telluride photovoltaics , doping , lattice (music) , core (optical fiber) , photoluminescence , nanotechnology , computer science , physics , optics , artificial intelligence , acoustics , composite material
Lattice‐strained CdTe/CdS:Cu quantum dots (QDs) with a widely tunable near‐infrared (NIR) fluorescence emission spectrum (700–910 nm) and long lifetime (up to 1 μs) are synthesized. Based on the multiemission and multi‐lifetime of the well‐defined QDs, NIR‐emitting two‐dimensional (2D) codes are achieved by embedding as‐prepared QDs into agarose beads. This provides a new strategy for fluorescent 2D codes.