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Structure of silver microclusters

✍ Scribed by P.A. Montano; J. Zhao; M. Ramanathan; G.K. Shenoy; W. Schulze; J. Urban

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
387 KB
Volume
164
Category
Article
ISSN
0009-2614

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✦ Synopsis

We have studied the structure of Ag microclusters using EXAFS. The measurements were performed over a wide range of cluster sizes at the National Synchrotron Light Source (NSLS), beam line X-18B. The clusters were prepared using the gas aggregation techmque and isolated in solid argon at 4.2 K. A strong contraction of the interatomic distances was observed for Ag dimers and multimers. Clusters larger than a mean diameter of 20 8, show a small contraction of the nearest-neighbor distance and a structure consistent with an fee lattice. By contrast, microclusters between 9 and I6 8, show a small nearest-neighbor expansion and a strong

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