Near-infrared-emitting two-dimensional codes based on lattice-strained core/(doped) shell quantum dots with long fluorescence lifetime

Chi Chen; Pengfei Zhang; Guanhui Gao; Duyang Gao; Yong Yang; Hong Liu; Yuhui Wang; Ping Gong; Lintao Cai

doi:10.1002/adma.201402369

Near-infrared-emitting two-dimensional codes based on lattice-strained core/(doped) shell quantum dots with long fluorescence lifetime

Adv Mater. 2014 Sep;26(36):6313-7. doi: 10.1002/adma.201402369. Epub 2014 Jul 25.

Authors

Chi Chen¹, Pengfei Zhang, Guanhui Gao, Duyang Gao, Yong Yang, Hong Liu, Yuhui Wang, Ping Gong, Lintao Cai

Affiliation

¹ Guangdong Key Laboratory of Nanomedicine, Shenzhen Bioactive Materials Engineering Lab for Medicine, CAS Key Laboratory of Health Informatics, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, PR China.

PMID: 25066411
DOI: 10.1002/adma.201402369

Abstract

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.

Keywords: codes; doping; lifetime; near-infrared; quantum dots.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cadmium Compounds / chemistry*
Cadmium Compounds / radiation effects
Light
Materials Testing
Quantum Dots*
Spectroscopy, Near-Infrared / methods*
Sulfides / chemistry*
Sulfides / radiation effects
Tellurium / chemistry*
Tellurium / radiation effects

Substances

Cadmium Compounds
Sulfides
cadmium sulfide
Tellurium
cadmium telluride