Enhanced green photoluminescence and dispersion of ZnO quantum dots shelled by a silica shell
| Autor: | Hung-Jue Sue, M. Pacio, Jaime Santoyo-Salazar, Antonio Arce-Plaza, Rene Pérez-Cuapio, J. Alberto Alvarado, L. H. Liang |
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| Rok vydání: | 2020 |
| Předmět: |
Photoluminescence
Materials science Silicon dioxide Quantum yield Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound General Materials Science technology industry and agriculture General Chemistry equipment and supplies 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Chemical engineering chemistry Quantum dot Transmission electron microscopy Modeling and Simulation Photocatalysis Surface modification Particle size 0210 nano-technology |
| Zdroj: | Journal of Nanoparticle Research. 22 |
| ISSN: | 1572-896X 1388-0764 |
| DOI: | 10.1007/s11051-020-04985-6 |
| Popis: | Zinc oxide (ZnO) quantum dots (QDs) stabilized/functionalized with oleic acid and core-shelled with silicon dioxide (SiO2) are presented. A colloidal route, free surfactant was followed to synthesize ZnO QDs with an average size of 5 nm. After, the ZnO QDs were stabilized with oleic acid to avoid aggregation followed by (3-aminopropyl) trimethoxysilane functionalization. The X-ray diffraction patterns and transmission electron microscopy results indicated that the ZnO QD size and morphology did not suffer any change after functionalization. In addition, the photoluminescence measurements showed a strong green emission band related to particle size and the shell formation. Moreover, the quantum yield and z potential values were determined and the results showed an enhanced for those ZnO@SiO2 samples with 10 wt% of shell precursor. In this research, we report a high relationship between the stability and photoluminescence properties with the shell precursor concentration. Furthermore, we have developed a reliable method to obtain functionalized ZnO QDs which offer a great potential for future use as photoemission devices such as photonics, photocatalytic activities, biomedicine, optoelectronic devices, and chemical sensing. |
| Databáze: | OpenAIRE |
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