Effective visualization of latent fingerprints with red fluorescent La2(MoO4)3:Eu3+ microcrystals
| Autor: | Shiqi Liu, Hongren Li, Tianfang Cui, Ruiyan Qi, Feng Li |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Lanthanide
Materials science Photoluminescence Mechanical Engineering Metals and Alloys Analytical chemistry Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence 0104 chemical sciences Mechanics of Materials X-ray crystallography Materials Chemistry Hydrothermal synthesis 0210 nano-technology Luminescence Powder diffraction |
| Zdroj: | Journal of Alloys and Compounds. 727:919-924 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2017.08.182 |
| Popis: | Lanthanide phosphors have recently been proven as a novel type of fluorescent label that can be extensively used in analytical detection. La 2 (MoO 4 ) 3 :Eu 3+ phosphors with uniform twinned hemispheres morphology have been successfully synthesized via a sodium citrate mediated hydrothermal method. The crystal structure has been determined by X-ray powder diffraction (XRD) and the microstructures were characterized by scanning electron microscopy (SEM). The La 2 (MoO 4 ) 3 :Eu 3+ microcrystals emitted strong emission at 616 nm under the 269 nm excitation. The photoluminescence (PL) emission intensities were enhanced with the increment of Eu 3+ ion concentration and the optimal doping concentration was 15 mol%. The as-prepared La 2 (MoO 4 ) 3 :Eu 3+ was further applied in developing latent fingerprint images, which exhibited clear and well-defined details with high contrast and low background interference under 254 nm excitation. This work shows that La 2 (MoO 4 ) 3 :Eu 3+ powder is a versatile fluorescent label for the detection of LFPs for individual identification in forensic science. |
| Databáze: | OpenAIRE |
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