Scanning tunneling microscopy observations of metallic clusters Pd561 and Au55 and the implications of their use as a well defined tip
- 1 March 1991
- journal article
- research article
- Published by American Vacuum Society in Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures
- Vol. 9 (2) , 814-819
- https://doi.org/10.1116/1.585518
Abstract
We investigated ligand stabilized clusters Au55(PPh3)12Cl6 and Pd561(phen)38±2O≊200 on gold and graphite substrates with scanning tunneling microscopy (STM) under atmospheric conditions. We were able to image dense layers of clusters as well as free‐lying clusters. Clusters are frequently picked up by the tip. This results in a tip with a well defined shape and electronic structure. Analysis of images of clusters scanned with another cluster attached to the tip can yield direct information on the tunnel distance. We found a tunnel distance of 24±5 Å.Keywords
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