Multicolor barcoding in a single upconversion crystal

Yuhai Zhang, Lixin Zhang, Renren Deng, Jing Tian, Yun Zong, Dayong Jin, Xiaogang Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

333 Citations (Scopus)


We report the synthesis of luminescent crystals based on hexagonal-phase NaYF4 upconversion microrods. The synthetic procedure involves an epitaxial end-on growth of upconversion nanocrystals comprising different lanthanide activators onto the NaYF4 microrods. This bottom-up method readily affords multicolor-banded crystals in gram quantity by varying the composition of the activators. Importantly, the end-on growth method using one-dimensional microrods as the template enables facile multicolor tuning in a single crystal, which is inaccessible in conventional upconversion nanoparticles. We demonstrate that these novel materials offer opportunities as optical barcodes for anticounterfeiting and multiplexed labeling applications.

Original languageEnglish
Pages (from-to)4893-4896
Number of pages4
JournalJournal of the American Chemical Society
Issue number13
Publication statusPublished - 2 Apr 2014


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