Abstract
High-quality CdTe nanocrystals capped by mercaptopropionic acid (MPA) were prepared in aqueous solution, then fluorescent, monodispersed, well-separated, core/shell CdTe@SiO 2 particles were prepared via reverse microemulsion method. Obtained samples were characterized by means of transmission electron microscope (TEM), UV-vis and PL emission. The influences of ionic strength and pH on the PL emission of uncoated CdTe and CdTe/SiO 2 composite nanoparticles were investigated thoroughly. The results show that due to the presence of SiO 2 shell, CdTe@ SiO 2 still remain a strong fluorescence at high ionic strength and a very broad pH range. Because of these advantages, it has broad applications in biological fields, such as biomarkers, cell imaging.
| Original language | English |
|---|---|
| Pages (from-to) | 49-52 |
| Number of pages | 4 |
| Journal | Journal of Tianjin Polytechnic University |
| Volume | 31 |
| Issue number | 1 |
| State | Published - 25 Feb 2012 |
| Externally published | Yes |
Keywords
- CdTe@SiO particles
- Core-shell
- Fluorescence properties
- Ionic strength
- Reverse microemulsion
- pH
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