Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 35, Pages 10383-10387Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201703600
Keywords
hollow structures; luminescence enhancement; microcrystals; multicolor barcoding; upconversion
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Funding
- National Natural Science Foundation of China [21573185, 51332008, 61574123, 11374009]
- Research Grants Council of Hong Kong [CityU 11208215]
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A class of one-dimensional hollow microstructure is described, which was formed by a kinetically controlled crystal growth process. A hexagonal-phase NaYbF4 microrod comprising isolated holes along the longitudinal axis was synthesized by a one-pot hydrothermal method with the assistance of citrate ligands. The structural void feature modulates light intensity across the microrods as a result of interference arising from light scattering and reflection by the inner walls. A single crystal comprising a structural void was doped with up converting lanthanide ions. Upon near-infrared excitation of the (loped crystal spatially resolvable optical codes were produced.
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