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Structural analysis of metal clusters using exafs

Cluskey, Paul D. (1992) Structural analysis of metal clusters using exafs. Master of Science (MSc) thesis, University of Kent. (KAR id:39042)

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Three gold phosphine clusters, Au55(PPhs)12Cl6, Au55PPh2(C6H4SO3Na)12Cl6 and Au11{PPh2(p-ClC6H4)}7I3 (which we shall denote Au55, Au55* and Au11 for convenience), and the large Palladium cluster approximated to Pd561phen36O200 (denoted Pd561 here) have been studied using EXAFS.

Results for the large palladium cluster were limited to metal atoms only. Bond distances show that, within the limits of experimental error, no contraction/dilation occurs. Values for near neighbour distances suggest a close packed structure. Debye-Waller factors indicate a remarkably rigid structure.

Analysis is pursued further by use of the Reverse Monte-Carlo (RMC) modelling method, which gives a three dimensional particle configuration of the system consistent with the EXAFS data. Results indicate that this modelling method has distinct weaknesses when attempting to simulate this type of system.

Item Type: Thesis (Master of Science (MSc))
Subjects: Q Science > QC Physics
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Clair Waller
Date Deposited: 07 Apr 2014 08:56 UTC
Last Modified: 29 May 2019 12:04 UTC
Resource URI: (The current URI for this page, for reference purposes)
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