کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5373221 | 1504210 | 2015 | 6 صفحه PDF | دانلود رایگان |

- Synthesis of colloidal nanosized Ga2O3 particles.
- Tunable emission by incorporating different lanthanide ions inside the Ga2O3 host.
- Z-scan measurements of two-photon absorption cross-section of Ga2O3 nanoparticles.
We demonstrate the use of thermal decomposition reaction to obtain Ga2O3 nanoparticles with average size around 5Â nm. The obtained nanoparticles presented a good colloidal stability and high optical transparency. We were also able to incorporate Eu3+ and Tb3+ ions inside the crystal host. The synthesized nanomaterials exhibited dual mode emission upon UV excitation, consisting of a broad band in the blue region and a characteristic series of sharp lines. The former resulted from donor-acceptor pairs recombination in Ga2O3 host, while the latter from 4f-4f electronic transitions in lanthanide ions. For fuller optical characterization of the obtained nanoparticles, we have performed wide wavelength range Z-scan studies, and calculated the values of nonlinear absorption cross-sections. Gallium (III) oxide nanoparticles showed two-photon absorption in the range between 500Â nm and 700Â nm, with molecular weight scaled nonlinear optical parameters exceeding the values for other lanthanide-doped nanoparticles of similar size.
Journal: Chemical Physics - Volume 456, 29 July 2015, Pages 73-78