Structural deformation, melting point and lattice parameter studies of size selected silver clusters |
| |
Authors: | I Shyjumon M Gopinadhan O Ivanova M Quaas H Wulff C A Helm R Hippler |
| |
Institution: | 1. Institut für Physik, Ernst-Moritz-Arndt-Universit?t Greifswald, Domstra?e 10a, 17489, Greifswald, Germany 2. Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universit?t Greifswald, Soldmannstra?e 16, 17489, Greifswald, Germany
|
| |
Abstract: | Silver clusters have been produced by magnetron sputtering in a gas aggregation nanocluster source. Clusters
are size selected using a quadrupole mass filter (3–8 nm) or by varying the aggregation tube length (9–20 nm) of the
nanocluster source. Mass selected clusters are deposited on a Si(100) substrate at different bias voltages and are
characterized by atomic force microscopy. We observe a significant flattening of clusters on the surface due to the
increase of impact energy as a result of increasing substrate bias voltage. The behavior of lattice parameters for size
selected clusters are investigated by X-ray diffraction. All measured lattice constants exhibit a tensile strain; it is
found that the lattice constant slightly increases with increasing cluster size up to a size of 12 nm and then
decreases. The melting temperature of deposited clusters is found to be size-dependent and significantly lower than for
bulk material, in agreement with theoretical considerations. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|