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Phonon-assisted energy back transfer-induced multicolor upconversion emission of Gd2O3:Yb(3+)/Er(3+) nanoparticles under near-infrared excitation.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Liu, Jingchuan Deng, Huawei Huang, Zhanyun Zhang, Yue-Li Chen, Dihu Shao, Yuanzhi |
| Copyright Year | 2015 |
| Abstract | Manipulation of upconversion (UC) emission is of particular importance for multiplexed bioimaging. Here, we precisely manipulate the UC color output by utilizing the phonon-assisted energy back transfer (EBT) process in ultra-small (sub-10 nm) Gd2O3:Yb(3+)/Er(3+) UC nanoparticles (UCNPs). We synthesized the Gd2O3:Yb(3+)/Er(3+) UCNPs by adopting the laser ablation in liquid (LAL) technique. The synthesized Gd2O3:Yb(3+)/Er(3+) UCNPs are small spherical and monoclinic structures. Continuous color-tunable (from green to red) UC fluorescence emission is achieved by increasing the concentration of Yb(3+) ions from 0 to 15 mol%. A phonon-assisted energy back transfer (EBT) process from Er(3+) ((4)S3/2 → (4)I13/2) to nearby Yb(3+) ((2)F7/2 → (2)F5/2), which can significantly enhance red emission at 672 nm and decrease green emission, is responsible for the color-tunable UC emission by increasing the Yb(3+) concentration in Gd2O3:Yb(3+)/Er(3+) UC nanoparticles. |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c5cp01632k |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/getauthorversionpdf/C5CP01632K |
| PubMed reference number | 26006337 |
| Alternate Webpage(s) | https://doi.org/10.1039/c5cp01632k |
| Journal | Medline |
| Volume Number | 17 |
| Issue Number | 23 |
| Journal | Physical chemistry chemical physics : PCCP |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
