Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/917
Title: Investigations of Pd clusters by the combined use of HREM, STM, high-energy spectroscopies and tunneling conductance measurements
Authors: Aiyer, Hemanthkumar N
Vijayakrishnan, V
Subbanna, G N
Rao, C N R
Keywords: Metal-Clusters
Palladium Clusters
Photoemission
Surface
States
Oxide
Issue Date: 1994
Publisher: Elsevier Science BV
Citation: Surface Science 313(3), 392-398 (1994)
Abstract: Palladium clusters deposited on carbon substrates by vacuum evaporation have been examined by high resolution electron microscopy and scanning tunneling microscopy to obtain the size distributions of the clusters. Pd(3d) binding energy of clusters of known size distributions have been measured to establish the variation of the binding energy with the cluster size. Clusters of a mean diameter of ≤ 1nm which show the highest Pd(3d) binding energies relative to the bulk metal also show a conductance gap in tunneling spectroscopic measurements. The results show the occurrence of a size-dependent metal-to-nonmetal transition in Pd clusters. This conclusion is corroborated by valence band and bremsstrahlung isochromat spectroscopic measurements which show the emergence of new states closer to E(F) with an increase in the cluster size.
Description: Restricted Access
URI: http://hdl.handle.net/10572/917
Other Identifiers: 0039-6028
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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