The concept of delayed nucleation in nanocrystal growthdemonstrated for the case of iron oxide nanodisks
A comprehensive study of iron oxide nanocrystal growth through non-hydrolitic, surfactant-mediated thermal reaction of iron pentacarbonyl and an oxidizer has been conducted, which includes size control, anisotropic shape evolution, and crystallographic phase transition of monodisperse iron oxide colloidal nanocrystals. The reaction was monitored by in situ UV-Vis spectroscopy taking advantage of the color change accompanying the iron oxide colloid formation allowing measurement of the induction time for nucleation. Features of the synthesis such as the size control and reproducibility are related to the occurrence of the observed delayed nucleation process. As a separate source of iron and oxygen is adopted, phase control could also be achieved by sequential injections of oxidizer.
- Research Organization:
- Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE Director. Office of Science. Office of Basic EnergySciences; Department of Defense. Air Force Office of Scientific ResearchGrant N F49620-01-1-0033; Italian Ministero dell'Instruzione. Universitae Ricerca MUIR PRIN
- DOE Contract Number:
- AC02-05CH11231
- OSTI ID:
- 889802
- Report Number(s):
- LBNL--58779; BnR: KC0203010
- Journal Information:
- Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Vol. 128; ISSN JACSAT; ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- English
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