| X-ray Photoelectron Spectroscopy
Course Objectives
• Learn about Photoemission Spectroscopy
• Learn about the experimental data interpretation and
data analyisis
• Understand problems can be solved
• Be introduced to the latest developments of the technique
Course Description
Photoemission is a well established and mature technique, offering
surface versus bulk tunability, atomic selectivity and sensitivity
to chemical state of the elements.
The outline of the course is:
• Physical basis of photoemission: distribution in energy
(binding and kinetic energy), intensity (cross section of the
ph process) angle (photoelectron momentum, asymmetry parameters
and diffraction of photoelectrons) and spin;
• Inelastic processes (free collision path) and life time
(core-hole interaction and energy broadening); effects on the
spectra line-shape
• Instrumentation: Laboratory and synchrotron radiation
light sources, monochromators, electron analysers, spin detectors.
Acquisition electronics;
• Case studies: valence (density of states and band mapping)
and core states (binding energy, chemical shifts and surface
shifts) in surfaces, interfaces and bulk materials; advantages
of high resolution photoemission;
• Developments of the photoemission technique:
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- spatial resolution - photoelectron microscopy: scanning
photoelectron microscopy (SPEM) and Spectroscopic Photoemission
and Low Energy Electron Microscope (SPELEEM)
- time resolved analysis -surface reaction,
- spin resolved photoemission – magnetisation,
- high energy photoemission - bulk materials. |
Who hould attend?
Scientists and engineers in industry, laboratory or academia,
students and technician who wish to learn or review the fundamentals
of photoemission technique.
Instructors: Dr. Maddalena Pedio
Course Materials: Lecture notes
| Short curriculum |
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Dr. Maddalena Pedio is Senior Scientist at the TASC-INFM national laboratory in Trieste. She is scientific coordinator of the laboratory Inverse Photoemission and electron Spectroscopies at TASC and is the local responsible of the BEAR-INFM beamline at the ELETTRA synchrotron. The Dr. M. Pedio research activity is focussed on fundamental aspects of condensed matter, as well as on the use of electron spectroscopies on materials and surface science performed both in laboratory apparata and synchrotron radiation facilities. Local structure determination and electronic properties of low dimensional systems are the two dominant themes in much of her research.
She has being responsible of several national and international projects.
M. Pedio investigated Photoemission and X-ray optical absorption and Inverse Photoemission (Empty electronic states) in condensed matter, both experimentally and theoretically for the application, modelisation and data analysis of absorption spectroscopies (XAFS) and Photoelectron diffraction with synchrotron radiation for condensed matter studies, in both ordered and disordered materials. Moreover she performed many applications of core level shift analysis by high resolution photoemission (ARUPS and surface photoelectron diffraction) and inverse photoemission in surface and interface characterization.
The dominant topics are studies on clean surfaces (elemental and III-V semiconductors, metals) interface formation and chemisorption of low Z elements on surfaces mainly bi and poly atomic molecules, fullerenes interacting with ordered surfaces. Recently she worked on development of surface treatment/growth processes of SiC materials expecially on the growth of SiC thin film by carburization of Si surfaces during fullerene deposition.
On the above topics, Dr. Pedio has about 75 original publications in JCR journals and over 100 presentations at International Conferences. |
Questions? pedio@tasc.infm.it
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