Advanced

Free Molecular and Metal Clusters Studied by Synchrotron Radiation Based Electron Spectroscopy

Rosso, Aldana LU (2008)
Abstract
The main purpose of this Thesis is the experimental characterization of the electronic and geometric structures of objects called clusters. A cluster consists of a finite group of bound atoms or molecules. Due to its finite size, it may present completely different properties than those of the isolated atom and the bulk. The clusters studied in this work are constituted by rare-gas atoms, organic molecules, and metal atoms. Intense cluster beams were created using either an adiabatic expansion source or a gas-aggregation source, and investigated by means of synchrotron radiation based photoelectron spectroscopy.The reports presented in this Thesis may be divided into three parts. The first one deals with results concerning homogeneous... (More)
The main purpose of this Thesis is the experimental characterization of the electronic and geometric structures of objects called clusters. A cluster consists of a finite group of bound atoms or molecules. Due to its finite size, it may present completely different properties than those of the isolated atom and the bulk. The clusters studied in this work are constituted by rare-gas atoms, organic molecules, and metal atoms. Intense cluster beams were created using either an adiabatic expansion source or a gas-aggregation source, and investigated by means of synchrotron radiation based photoelectron spectroscopy.The reports presented in this Thesis may be divided into three parts. The first one deals with results concerning homogeneous molecular clusters (benzene- and methyl-related clusters) highlighting how molecular properties, such as dipole moment and polarizability, influence the cluster structure. The second part focuses on studies of solvation processes in clusters. In particular, the adsorption of polar molecules on rare-gas clusters is studied. It is shown that the doping method, i.e. the technique used to expose clusters to molecules, and the fraction of polar molecules are important factors in determining the location of the molecules in the clusters. Finally, a summary of investigations performed on metal clusters is presented. The applicability of solid state models to analyse the cluster spectra is considered, and the differences between the atomic, cluster and solid electronic structures are discussed. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Thesis
publication status
published
publisher
Uppsala (Uppsala University)
ISBN
978-91-554-7307-5
language
English
LU publication?
no
id
aca14ad5-1122-4030-b3e4-a5d9881b5fcd
alternative location
https://www.diva-portal.org/smash/get/diva2:172661/FULLTEXT01.pdf
date added to LUP
2016-09-11 23:02:48
date last changed
2016-12-07 07:50:06
@phdthesis{aca14ad5-1122-4030-b3e4-a5d9881b5fcd,
  abstract     = {The main purpose of this Thesis is the experimental characterization of the electronic and geometric structures of objects called clusters. A cluster consists of a finite group of bound atoms or molecules. Due to its finite size, it may present completely different properties than those of the isolated atom and the bulk. The clusters studied in this work are constituted by rare-gas atoms, organic molecules, and metal atoms. Intense cluster beams were created using either an adiabatic expansion source or a gas-aggregation source, and investigated by means of synchrotron radiation based photoelectron spectroscopy.The reports presented in this Thesis may be divided into three parts. The first one deals with results concerning homogeneous molecular clusters (benzene- and methyl-related clusters) highlighting how molecular properties, such as dipole moment and polarizability, influence the cluster structure. The second part focuses on studies of solvation processes in clusters. In particular, the adsorption of polar molecules on rare-gas clusters is studied. It is shown that the doping method, i.e. the technique used to expose clusters to molecules, and the fraction of polar molecules are important factors in determining the location of the molecules in the clusters. Finally, a summary of investigations performed on metal clusters is presented. The applicability of solid state models to analyse the cluster spectra is considered, and the differences between the atomic, cluster and solid electronic structures are discussed.},
  author       = {Rosso, Aldana},
  isbn         = {978-91-554-7307-5},
  language     = {eng},
  publisher    = {Uppsala (Uppsala University)},
  title        = {Free Molecular and Metal Clusters Studied by Synchrotron Radiation Based Electron Spectroscopy},
  year         = {2008},
}