Multicolor Barcoding in a Single Upconversion Crystal

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• 作者：Yuhai Zhang ; Lixin Zhang ; Renren Deng ; Jing Tian ; Yun Zong ; Dayong Jin ; Xiaogang Liu
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：April 2, 2014
• 年：2014
• 卷：136
• 期：13
• 页码：4893-4896
• 全文大小：376K
• 年卷期：v.136,no.13(April 2, 2014)
• ISSN：1520-5126

文摘

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.