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Assembly of nano-domain buildings blocks of copper oxalate with a cubic morphology

Published online by Cambridge University Press:  01 February 2011

L. C. Soare ,
P. Bowen ,
J. Lemaître ,
H. Hofmann ,
M. Pijolat  and
F. Valdivieso
L. C. Soare
Affiliation:
Powder Technology Laboratory, Institute of Materials, Swiss Federal Institute of Technology, EPFL, CH-1015 Lausanne, Switzerland.
P. Bowen
Affiliation:
Powder Technology Laboratory, Institute of Materials, Swiss Federal Institute of Technology, EPFL, CH-1015 Lausanne, Switzerland.
J. Lemaître
Affiliation:
Powder Technology Laboratory, Institute of Materials, Swiss Federal Institute of Technology, EPFL, CH-1015 Lausanne, Switzerland.
H. Hofmann
Affiliation:
Powder Technology Laboratory, Institute of Materials, Swiss Federal Institute of Technology, EPFL, CH-1015 Lausanne, Switzerland.
M. Pijolat
Affiliation:
École Nationale Supérieure des Mines de Saint-Étienne 158, cours Fauriel F-42023 Saint-Étienne cedex 2 E-mail: [email protected]
F. Valdivieso
Affiliation:
École Nationale Supérieure des Mines de Saint-Étienne 158, cours Fauriel F-42023 Saint-Étienne cedex 2 E-mail: [email protected]
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Abstract

Metallic copper nanostructured particles were synthesised by thermal decomposition of a CuC2O4 precursor obtained via the precipitation reaction between Cu(NO3)2·6H2O and Na2C2O4 in the present of hydroxyl propyl methyl cellulose (HPMC). X-ray diffraction (XRD), high resolution scanning electron microscopy (HRSEM) and thermogravimetric analysis (TG) were used to characterise the particles and their evolution during the transformation to metallic copper. We highlight the nanostructured nature of the oxalate precursor, which is made up of anisotropic nanosized buildings blocks (25nm by 40nm). These produce an anisotropy in the oxalate particle and influence the decomposition pathway. The results show the evolution of the nanostructure as a function of degree of reaction and a possible kinetic model is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 788: Symposium L – Continuous Nanophase and Nanostructured Materials , 2003 , L1.4
Copyright
Copyright © Materials Research Society 2004

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