Abstract
Core-shell CdS nanocrystals, which were modified by different-chain length alkyl thiols, were chemically synthesized by a new liquid-liquid two-phase method. The structure and composition were investigated with UV-Vis absorption spectra, X-ray diffraction, and transmission electron microscopy. The results showed these as-prepared samples consisting of a nano-CdS core and a capped-layer of thiols chemically absorbed on the surface, and the modifiers had a great effect on the size and optical property of the inorganic nano-core. According to further analysis, it was found that the size of CdS nano-core had a quasi-parabola relation with the chain length of the modifiers, which was caused by the competitive result of the surface mobility and self-assembly order of the modifiers in the course of nucleation and growth of CdS nano-core.
| Original language | English |
|---|---|
| Pages (from-to) | 1334-1337 |
| Number of pages | 4 |
| Journal | Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities |
| Volume | 26 |
| Issue number | 7 |
| State | Published - Jul 2005 |
| Externally published | Yes |
Keywords
- CdS nanocrystals
- Core-shell structure
- Liquid-liquid two-phase method
- Self-assembly order
- Surface mobility