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The Nanostructures of Amorphous Silicas

Published online by Cambridge University Press:  28 March 2002

Linn W. Hobbs
Affiliation:
Department of Materials Science and Engineering, Room 13-4054, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA
Xianglong Yuan
Affiliation:
Department of Materials Science and Engineering, Room 13-4054, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA
L.C. Qin
Affiliation:
Department of Materials Science and Engineering, Room 13-4054, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA
Vinay Pulim
Affiliation:
Laboratory for Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA
Alexander Coventry
Affiliation:
Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA

Abstract

Topologically modeled amorphized silica structures have been refined using a molecular dynamics simulation technique. Several metastable structures with substantially different medium-range connectivities, as characterized by primitive ring statistics, were obtained. Whereas the total correlation function is insensitive to these differences, the first sharp diffraction peak derived from energy-filtered electron diffraction shows a promising correlation to medium-range structure.

Type
Research Article
Copyright
© 2002 Microscopy Society of America

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