Spectroscopic Characterization of the Surface of Iron Oxide Nanocrystals
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- 作者：Amanda L. Willis ; Nicholas J. Turro ; and Stephen O'Brien
- 刊名：Chemistry of Materials
- 出版年：2005
- 出版时间：November 29, 2005
- 年：2005
- 卷：17
- 期：24
- 页码：5970 - 5975
- 全文大小：312K
- 年卷期：v.17,no.24(November 29, 2005)
- ISSN：1520-5002
文摘
The surface of highly monodisperse magnetic iron oxide (
-Fe2O3) nanocrystals was thoroughlyinvestigated by FTIR, NMR, and mass spectroscopy. The nanocrystals were prepared by a thermaldecomposition method now widely used for the preparation of magnetic metal and metal oxide nanocrystals.This method takes advantage of oleic acid as a means to passivate the surface and render the particlesstable with respect to aggregation or grain growth and keeps them highly dispersed in a variety of organicmedia. The nature of this surface in terms of ligand structure and the role of oleic acid during the synthesisremained somewhat undetermined until this report. We provide spectroscopic evidence of an oleic acidligand structural change during -Fe2O3 nanocrystal synthesis.
-Fe2O3) nanocrystals was thoroughlyinvestigated by FTIR, NMR, and mass spectroscopy. The nanocrystals were prepared by a thermaldecomposition method now widely used for the preparation of magnetic metal and metal oxide nanocrystals.This method takes advantage of oleic acid as a means to passivate the surface and render the particlesstable with respect to aggregation or grain growth and keeps them highly dispersed in a variety of organicmedia. The nature of this surface in terms of ligand structure and the role of oleic acid during the synthesisremained somewhat undetermined until this report. We provide spectroscopic evidence of an oleic acidligand structural change during -Fe2O3 nanocrystal synthesis.