Surface morphology on a nanometer scale studied by two-photon photoelectron spectroscopy
The high resolution 2-photon photoelectron spectroscopy of weakly bound image-potential states can be used to monitor the surface morphology of ultrathin metal films. States on terraces of different layer height can be distinguished and the growth mode can be inferred from the presence or absence of several of these states. Lateral localization of the states on small islands leads to an increase of the energy which can be described by the simple model of an electron in a potential well. Distributions of island sizes can be derived on the nanometer scale and compare well with the results of nucleation theory. The high resolution spectroscopy of image potential states provides a new tool to study the growth of metal films without disturbing the surface.
Bibliographic Reference: Article: Proceedings of the Society of Photo-Optical Instrumentation Engineers, Vol. 2547 (1995) pp. 267-278
Record Number: 199610321 / Last updated on: 1996-03-29
Original language: en
Available languages: en