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Synthesis and Characterization of Structured Metal/Silica Clusters

Published online by Cambridge University Press:  21 February 2011

A.N. Patil ,
N. Otsuka  and
R.P. Andres
A.N. Patil
Affiliation:
School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47906, U.S.A.
N. Otsuka
Affiliation:
School of Materials Science and Engineering, Purdue University, West Lafayette, Indiana 47906, U.S.A.
R.P. Andres
Affiliation:
School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47906, U.S.A.
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Abstract

The synthesis of two component clusters of Au/SiO2, Ag/SiO2 and Cu2O/SiO2 is described. These heteronuclear clusters are synthesized as metal/silicon clusters of controlled composition and controlled size using a novel gas aggregation source and by means of gas phase annealing are transformed into ‘structured’ particles. The final metal/oxide and oxide/oxide clusters are formed by air exposure. The structure of these nanostructured particles is determined by electron diffraction and transmission electron microscopy (TEM). The clusters exhibit two distinct structural forms: (1) clusters consisting of a metal rich core surrounded by a silicon rich skin and (2) clusters having a metal rich domain and a silicon rich domain separated by a sharp interface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 332: Symposium U – Determining Nanoscale Physical Properties of Materials by Microscopy and Spectroscopy , 1994 , 195
Copyright
Copyright © Materials Research Society 1994

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References

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