The atomic structure of transition metal clusters

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Chemical reactions are used to probe the atomic (geometrical) structure of isolated clusters of transition metal atoms. The number of adsorbate molecules that saturate a cluster, and/or the binding energy of molecules to cluster surfaces, are determined as a function of cluster size. Systematics in these properties often make it possible to propose geometrical structures consistent with the experimental observations. We will describe how studies of the reactions of cobalt and nickel clusters with ammonia, water, and nitrogen provide important and otherwise unavailable structural information. Specifically, small (less than 20 atoms) clusters of cobalt and nickel atoms adopt entirely different ... continued below

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20 p.

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Riley, S.J. August 1, 1995.

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Description

Chemical reactions are used to probe the atomic (geometrical) structure of isolated clusters of transition metal atoms. The number of adsorbate molecules that saturate a cluster, and/or the binding energy of molecules to cluster surfaces, are determined as a function of cluster size. Systematics in these properties often make it possible to propose geometrical structures consistent with the experimental observations. We will describe how studies of the reactions of cobalt and nickel clusters with ammonia, water, and nitrogen provide important and otherwise unavailable structural information. Specifically, small (less than 20 atoms) clusters of cobalt and nickel atoms adopt entirely different structures, the former having packing characteristic of the bulk and the latter having pentagonal symmetry. These observations provide important input for model potentials that attempt to describe the local properties of transition metals. In particular, they point out the importance of a proper treatment of d-orbital binding in these systems, since cobalt and nickel differ so little in their d-orbital occupancy.

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20 p.

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INIS; OSTI as DE95015708

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  • 9. international conference on liquid and amorphous metals, Chicago, IL (United States), 27 Aug - 1 Sep 1995

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  • Other: DE95015708
  • Report No.: ANL/CHM/CP--86177
  • Report No.: CONF-950815--1
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 101122
  • Archival Resource Key: ark:/67531/metadc622933

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Office of Scientific & Technical Information Technical Reports

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  • August 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Dec. 14, 2015, 12:20 p.m.

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Riley, S.J. The atomic structure of transition metal clusters, article, August 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc622933/: accessed July 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.