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Title: Process for making surfactant capped metal oxide nanocrystals, and products produced by the process

Patent ·
OSTI ID:1175613

Disclosed is a process for making surfactant capped nanocrystals of metal oxides which are dispersable in organic solvents. The process comprises decomposing a metal cupferron complex of the formula MXCupX, wherein M is a metal, and Cup is a N-substituted N-Nitroso hydroxylamine, in the presence of a coordinating surfactant, the reaction being conducted at a temperature ranging from about 150 to about 400.degree. C., for a period of time sufficient to complete the reaction. Also disclosed are compounds made by the process.

Research Organization:
Univ. of California, Oakland, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC03-SF00098
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Number(s):
6,984,369
Application Number:
09/721,126
OSTI ID:
1175613
Country of Publication:
United States
Language:
English

References (16)

Preparation and properties of uniform size colloids journal April 1993
Infrarotspektroskopische untersuchungen an metallcupferronaten im bereich 4000-32 cm-1 journal October 1976
Synthesis of TiO 2 Nanocrystals by Nonhydrolytic Solution-Based Reactions journal February 1999
A New Nonhydrolytic Single-Precursor Approach to Surfactant-Capped Nanocrystals of Transition Metal Oxides journal December 1999
Matrix-Mediated Synthesis of Nanocrystalline ggr-Fe2O3: A New Optically Transparent Magnetic Material journal July 1992
Self-Organization of CdSe Nanocrystallites into Three-Dimensional Quantum Dot Superlattices journal November 1995
Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites journal September 1993
Highly Monodisperse Quantum Sized CdS Particles by Size Selective Precipitation journal April 1993
Kinetics of II-VI and III-V Colloidal Semiconductor Nanocrystal Growth:  “Focusing” of Size Distributions journal June 1998
New Syntheses of Cobalt Ferrite Particles in the Range 2−5 nm:  Comparison of the Magnetic Properties of the Nanosized Particles in Dispersed Fluid or in Powder Form journal January 1996
The structure of magnetite journal April 1981
Bis(cupferronato)copper(II), [Cu(C6H5N2O2)2] journal August 1995
Synthesis of monodisperse cobalt nanocrystals and their assembly into magnetic superlattices (invited) journal April 1999
Manganese Cupferronate journal July 1996
The crystal structure of iron cupferron Fe(O 2 N 2 C 6 H 5 ) 3 journal May 1965
Ordered aggregates of ultrafine iron oxide particles: ‘Super crystals’ journal August 1989

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