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Chemical and Physical Processes from Electron-Molecule Interactions

English title Chemical and Physical Processes from Electron-Molecule Interactions
Applicant Allan Michael
Number 144367
Funding scheme Project funding
Research institution Département de Chimie Université de Fribourg
Institution of higher education University of Fribourg - FR
Main discipline Physical Chemistry
Start/End 01.01.2013 - 31.03.2016
Approved amount 389'552.00
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Keywords (14)

resonances; electron-molecule scattering; elastic scattering; electron-driven chemistry; dissociative electron attachment; ionic liquids; plasma chemistry; electron-molecule cross sections; electron scattering; spectroscopy and reactivity of transient anions; processes in low pressure plasmas; vibrational excitation; 2-dimensional electron energy loss spectra; ultrafast nuclear dynamics in resonances

Lay Summary (German)

Lead
Die Anwendungen von Elektronenstoss induzierten physikalischen und chemischen Prozessen wurden als „schlafender Riese“ bezeichnet - sie sind sehr zahlreich und werden umfangreich genutzt, aber wenige Leute sind sich dessen bewusst. Firmen die diese Technologien verwenden machen es häufig sehr diskret. Die Anwendungen beinhalten die Nanofabrikation mittels fokussierter Elektronenstrahlen, Plasma unterstützte Fabrikation in der Mikroelektronik, Strahlentherapie von Krebs und die sogenannten „E-beam“ Technologien, verwendet bei der Herstellung von Reifen, Sterilisierung der Verpackungen, und vielen mehr. Wir betreiben Grundlagenforschung über die zugrundeliegenden elementaren Elektronen-Molekülprozesse. Die Wahl der untersuchten Moleküle und der Fragestellungen orientiert sich an den Bedürfnissen der Anwendungen, in letzter Zeit zum Beispiel an der bereits erwähnten Nanofabrikation mittels fokussierter Elektronenstrahlen, wo eine breite europäische Zusammenarbeit besteht.
Lay summary

Inhalt und Ziel des Forschungsprojekts

Ziel der Forschung war es, mit einer im Hause wesentlich verbesserten apparativen Infrastruktur besonders hochwertige Daten, sogenannte Streuquerschnitte, zu ermitteln, die eine tiefere Einsicht in die der Elektronenstossprozessen zugrundeliegenden Mechanismen brachten. Diese Einsicht inspiriert Fortschritte in den angrenzenden Anwendungen. Die Forschung in Freiburg betont auch die Weiterentwicklung der Messapparate, die es erlaubte, „neue Welten zu entdecken“, bisher nicht messbare Prozesse zu erfassen.

Wissenschaftlicher und gesellschaftlicher Kontext des Forschungsprojekts

Wir leisten einen Beitrag zur Weiterentwicklung der E-beam und verwandten Technologien, die häufig leistungsfähiger und auch ökologischer sind als Alternativen, indem sie z.B. keine Lösungsmittel benötigen.

Keywords

Elektroneninduzierte Chemie und Physik, E-beam, freie Elektronen.

Direct link to Lay Summary Last update: 20.06.2016

Responsible applicant and co-applicants

Employees

Publications

Publication
Absolute cross sections for electronic excitation of pyrimidine by electron impact
Regeta Khrystyna, Allan Michael, Mašín Zdeněk, Gorfinkiel Jimena D. (2016), Absolute cross sections for electronic excitation of pyrimidine by electron impact, in Journal of Chemical Physics, 144, 024302.
Excited States of Pt(PF3)4 and Their Role in Focused Electron Beam Nanofabrication
Zlatar Matija, Allan Michael, Fedor Juraj (2016), Excited States of Pt(PF3)4 and Their Role in Focused Electron Beam Nanofabrication, in Journal of Physical Chemistry C , 120, 10667.
Recent research directions in Fribourg: Nuclear dynamics in resonances revealed by 2-dimensional EEL spectra, electron collisions with ionic liquids and electronic excitation of pyrimidine
Allan Michael, Regeta Khrystyna, Gorfinkiel Jimena D., Mašín Zdeněk, Grimme Stefan, Bannwarth Christoph (2016), Recent research directions in Fribourg: Nuclear dynamics in resonances revealed by 2-dimensional EEL spectra, electron collisions with ionic liquids and electronic excitation of pyrimidine, in European Physical Journal D, 70, 123.
Resonance effects in elastic cross sections for electron scattering on pyrimidine: Experiment and theory
Regeta Khrystyna, Allan Michael, Winstead Carl, McKoy Vincent, Mašín Zdeněk, Gorfinkiel Jimena D. (2016), Resonance effects in elastic cross sections for electron scattering on pyrimidine: Experiment and theory, in Journal of Chemical Physics, 144, 024301.
Absolute cross sections for electronic excitation of furan by electron impact
Regeta Khrystyna, Allan Michael (2015), Absolute cross sections for electronic excitation of furan by electron impact, in Physical Review A, 91, 012707.
Electron-impact vibrational excitation of cyclopropane
Čurík Roman, Čársky Petr, Allan Michael (2015), Electron-impact vibrational excitation of cyclopropane, in Journal of Chemical Physics, 142, 144312.
Free electrons and ionic liquids: study of excited states by means of electron-energy loss spectroscopy and the density functional theory multireference configuration interaction method
Regeta Khrystyna, Bannwarth Christoph, Grimme Stefan, Allan Michael (2015), Free electrons and ionic liquids: study of excited states by means of electron-energy loss spectroscopy and the density functional theory multireference configuration interaction method, in Physical Chemistry Chemical Physics, 17, 15771.
Importance of Time Scale and Local Environment in Electron-Driven Proton Transfer. The Anion of Acetoacetic Acid
Keolopile Zibo G., Gutowski Maciej, Buonaugurio Angela, Collins Evan, Zhang Xinxing, Erb Jeremy, Lectka Thomas, Bowen Kit H., Allan Michael (2015), Importance of Time Scale and Local Environment in Electron-Driven Proton Transfer. The Anion of Acetoacetic Acid, in Journal of the American Chemical Society, 137, 14329.
Transient anions of cis- and trans-cyclooctene studied by electron-impact spectroscopy
Regeta Khrystyna, Nagarkar Amit, Kilbinger Andreas F. M., Allan Michael (2015), Transient anions of cis- and trans-cyclooctene studied by electron-impact spectroscopy, in Physical Chemistry Chemical Physics, 17, 4696.
Two-dimensional spectra of electron collisions with acrylonitrile and methacrylonitrile reveal nuclear dynamics
Regeta Khrystyna, Allan Michael (2015), Two-dimensional spectra of electron collisions with acrylonitrile and methacrylonitrile reveal nuclear dynamics, in Journal of Chemical Physics, 142, 184307.
Autodetachment dynamics of acrylonitrile anion revealed by 2D electron impact spectra
Regeta Khrystyna, Allan Michael (2014), Autodetachment dynamics of acrylonitrile anion revealed by 2D electron impact spectra, in Journal of Physics: Conference Series, 488, 052007.
Joint experimental and theoretical study on vibrational excitation cross sections for electron collisions with diacetylene
Čurík Roman, Paidarová Ivana, Allan Michael, Čársky Petr (2014), Joint experimental and theoretical study on vibrational excitation cross sections for electron collisions with diacetylene, in Journal of Physical Chemistry A, 118, 9734.
The electronic structure of TEMPO, its cation and anion
Regeta Khrystyna, Janečková Radmila, Kubala Dušan, Fedor Juraj, Allan Michael (2014), The electronic structure of TEMPO, its cation and anion, in Journal of Physics: Conference Series, 488, 052008.
Autodetachment Dynamics of Acrylonitrile Anion Revealed by Two-Dimensional Electron Impact Spectra
Regeta Khrystyna, Allan Michael (2013), Autodetachment Dynamics of Acrylonitrile Anion Revealed by Two-Dimensional Electron Impact Spectra, in Physical Review Letters, 110, 203201.
Experimental Evidence on the Mechanism of Dissociative Electron Attachment to Formic Acid
Janečková Radmila, Kubala Dušan, May Olivier, Fedor Juraj, Allan Michael (2013), Experimental Evidence on the Mechanism of Dissociative Electron Attachment to Formic Acid, in Physical Review Letters, 111, 213201.
The electronic structure of TEMPO, its cation and anion
Kubala Dušan, Regeta Khrystyna, Janečková Radmila, Fedor Juraj, Grimme Stefan, Hansen Andreas, Nesvadba Peter, Allan Michael (2013), The electronic structure of TEMPO, its cation and anion, in Molecular Physics, 488, 2033.

Collaboration

Group / person Country
Types of collaboration
Carl Winstead, Vincent McKoy, CALTECH United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Ilya I. Fabrikant, University of Nebraska Lincoln United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
Petr Carsky, Roman Curik, Academy of Sciences of the Czech Republic Czech Republic (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Maciej Gutowski, Heriot-Watt University, Edinburgh Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Kit H. Bowen, Johns Hopkins University United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Stefan Grimme, University of Bonn Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Jimena D. Gorfinkiel, Open University, Milton Keynes, U.K. Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
The 3dr CELINA Meeting Poster Electrons and Ionic Liquids 18.05.2016 Krakow, Poland Allan Michael; Regeta Khrystyna;
The 3dr CELINA Meeting Poster Two-Dimensional Electron Energy Loss Spectra as a Probe of Fast Dynamics in Resonances 18.05.2016 Krakow, Poland Allan Michael;
The 3rd CELINA Meeting Poster On the Puzzling Mechanism of loss of H-Atom in Acidic Compounds: Phenol 18.05.2016 Krakow, Poland Allan Michael;
251th National ACS Meeting, Symposium “Electronic Structure & Dynamics of Metastable States”, March 13–17, 2016; San Diego, USA Talk given at a conference Two-dimensional electron impact spectra, electrons and ionic liquids and electronic excitation of pyrimidine 13.03.2016 San Diego, United States of America Allan Michael;
SAOG 2016, January 22, 2016; Fribourg, Switzerland Talk given at a conference Surfaces of ionic liquids studied by low energy electron collisions and DFT/MRCI theory 22.01.2016 Fribourg, Switzerland Allan Michael; Regeta Khrystyna;
XVIII International Workshop on Low-Energy Positron and Positronium Physics & XIX International Symposium on Electron-Molecule Collisions and Swarms (POSMOL 2015) Talk given at a conference Nuclear dynamics in resonances, 2-dimensional EEL spectra, electrons and ionic liquids, electronic excitation and other stories 17.07.2015 Lisboa, Portugal Allan Michael; Regeta Khrystyna;
27th Summer School and International Symposium on the Physics of Ionized Gases (SPIG 2014) Talk given at a conference Measuring elementary plasma processes: elastic scattering, vibrational and electronic excitation, dissociative attachment 26.08.2014 Belgrade, Serbien Allan Michael;
DPG Spring Meeting 2014 Talk given at a conference Selected Personal Highlights of Electron Collision Work 17.03.2014 Berlin, Germany Allan Michael;


Associated projects

Number Title Start Funding scheme
131962 Chemical and Physical Processes from Electron-Molecule Interactions 01.10.2010 Project funding

Abstract

Basic physical and chemical processes induced by attachment of free electrons to molecules or an atoms were measured. The molecules and atoms are chosen by relevance to plasma processing, nanofabrication by focused electron beams, atmospheric and space chemistry, radiation damage to living tissue, fusion plasma, and by pure scientific interest. The latter concerns particularly new resonant phenomena near threshold and in the backward scattering, in scattering with complex molecules, and in collaborations with current development of scattering theory. Emphasis is on advanced custom-built instrumentation, permitting the measurement of high-quality quantitative (absolute) cross sections for elastic scattering, vibrational and electronic excitation, and dissociative electron attachment. Exploratory measurements of electron collisions with ionic liquids and dissolved molecules were performed. The technique od 2-dimensional Electron Energy Loss Spectroscopy has been introduced as a means to gain insight into the ultrafast (order of 1ps) nuclear dynamics on resonant potential surfaces of a transient anion.
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