Preparation of NaYF4:Yb3+,Tm3+@NaGdF4:Ce3+,Eu3+ double-jacket microtubes for dual-mode fluorescent anti-counterfeiting
| Autor: | Li-jian Xu, Haihu Tan, Yin Chen, Li Na, Chao Tong, Shaowen Xie, Jian-xiong Xu |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Ostwald ripening Materials science Ligand Metals and Alloys 02 engineering and technology 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Photochemistry 01 natural sciences Fluorescence Photon upconversion Crystal symbols.namesake chemistry.chemical_compound chemistry 0103 physical sciences Materials Chemistry symbols Nanorod 0210 nano-technology Luminescence Acrylic acid |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 30:3333-3346 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(20)65465-6 |
| Popis: | Novel hydrophilic NaYF4:Yb3+,Tm3+@NaGdF4:Ce3+,Eu3+ double-jacket microtubes (DJMTs) with upconversion/ downconversion dual-mode luminescence were designed and prepared through epitaxial growth of NaGdF4:Ce3+, Eu3+ shell onto the NaYF4:Yb3+,Tm3+ microtube via poly(acrylic acid) (PAA) mediated hydrothermal method. It is demonstrated that PAA ligand played an important role in guiding the direct growth of NaGdF4:Ce3+,Eu3+ shell onto the surface of NaYF4:Yb3+,Tm3+ parent microtubes. The growth of NaGdF4:Ce3+,Eu3+ shell experienced a crystal phase transition from β-NaGdF4 and β-NaYF4 mixture to β-NaYF4@NaGdF4 composite crystal, and morphology evolution from mixture of β-NaGdF4:Ce3+,Eu3+ nanorods and β-NaYF4:Yb3+,Tm3+ microtubes to NaYF4:Yb3+,Tm3+@NaGdF4: Ce3+,Eu3+ DJMTs. The formation mechanism of DJMTs was the dissolution−renucleation of β-NaGdF4:Ce3+,Eu3+ nanorods and the growth of β-NaGdF4:Ce3+,Eu3+ shell via the classical Ostwald ripening mechanism. The as-prepared DJMTs could exhibit blue upconversion and red downconversion luminescence, which was further made into environmentally benign luminescent inks for creating highly secured and fluorescent-based anti-counterfeiting patterns via inkjet printing. |
| Databáze: | OpenAIRE |
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