Abstract
Novel poly(N-vinyl-2-pyrrolidone) (PVP)-coated nickel ferrite nanocrystals were prepared by simultaneously pyrolyzing nickel(II) acetylacetonate (Ni(acac)2) and iron(III) acetylacetonate (Fe(acac)3) in N-vinyl-2-pyrrolidone (NVP). The PVP coating was formed in situ through polymerization of NVP. The crystalline structure of the resultant nickel ferrite was analyzed by high-resolution transmission electron microscopy, electron diffraction patterns, and powder X-ray diffraction. In addition, the valence state of Ni and the metal contents of Ni and Fe in different valence states were analyzed by X-ray photoelectron spectroscopy (XPS), atomic absorption and the phenanthroline method. The surface coating layer of PVP and its binding states were characterized by Fourier transform infrared spectroscopy in combination with XPS. Colloidal stability experiments revealed that the nanocrystals could be dispersed well in both phosphate-buffered saline and Dulbecco's Modified Eagle Medium.
| Original language | English |
|---|---|
| Pages (from-to) | 3472-3478 |
| Number of pages | 7 |
| Journal | Chinese Science Bulletin |
| Volume | 55 |
| Issue number | 30 |
| DOIs | |
| Publication status | Published - Oct 2010 |
| Externally published | Yes |
Keywords
- colloidal stability
- magnetic nanocrystals
- N-vinyl-2-pyrrolidone
- thermal decomposition