Thumbnail
Access Restriction
Open

Author Puntes, Victor F. ♦ Krishnan, Kannan M. ♦ Alivisatos, Paul
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CARBONYLS ♦ COBALT ♦ CONTROLLED ATMOSPHERES ♦ DISTRIBUTION ♦ INERT ATMOSPHERE ♦ OXIDES ♦ PHYSICS ♦ PYROLYSIS ♦ SHAPE ♦ SUPERLATTICES ♦ SURFACTANTS ♦ SYNTHESIS
Abstract A method of producing high-quality magnetic colloidal dispersions by the rapid pyrolysis of cobalt carbonyl in an inert atmosphere was employed to produce monodispersed, stabilized, defect-free {epsilon}-cobalt nanocrystals, with spherical shapes and sizes ranging from 3 to 17 nm. The size distribution and the shape of the nanocrystals were controlled by varying the surfactant (oleic acid, phosphonic oxides and acids, etc.), its concentration, and the reaction temperature. These particles have been observed to produce two-dimensional self-assemblies when evaporated at low rates in a controlled atmosphere. A collective behavior due to dipolar interactions has been observed in the low susceptibility measurements corresponding to a highly ordered fine particles system.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-04-09
Publisher Place United States
Journal Applied Physics Letters
Volume Number 78
Issue Number 15


Open content in new tab

   Open content in new tab