Description
Organisation/Company: CNRS
Research Field: Physics
Researcher Profile: First Stage Researcher (R1)
Application Deadline: 23/05/2022 23:59 - Europe/Brussels
Location: France › ST ETIENNE DU ROUVRAY CEDE
Type Of Contract: Temporary
Job Status: Full-time
Hours Per Week: 35
Offer Starting Date: 01/10/2022
The GPM (Materials Physics Group, UMR CNRS 6634) is structured into 5
departments: Materials-Aging-Mechanics, Scientific Instrumentation,
Nanosciences, Disordered Systems-Polymers and Nano-Health-Physics. It brings
together 160 staff, including 60 Teachers-Researchers/Researchers, 30 ITAs and
70 PhD students/Postdocs/Trainees. The laboratory is located on the Campus
Sciences et Ingénierie Rouen Normandie (in Saint Etienne du Rouvray), within
the University of Rouen Normandie and INSA Rouen Normandie (7000m2).
The recruited doctoral student will be attached to the scientific
instrumentation department, which includes 5 teacher-researchers, 5
engineers,, 3 post-doctoral students and 5 doctoral students.
Exploration of experimental methods for quantification and imaging of hydrogen
reactions by atom probe tomography
Hydrogen is gathering increasing attention due to its importance as an energy
vector. Beyond this aspect, it plays an important role in determining the
structural properties of metals, and interacts with functional defects in
semiconductors.
The potential of advanced analysis and imaging techniques for an in-depth
study of hydrogen - an often elusive element for many microanalysis techniques
- is linked to their ability to analyze chemical species present on the
surface or in the volume of a sample, allowing their localization and chemical
identification. The Tomographic Atom Probe allows the detection of single
atoms and their localization in 3D within a nanometric volume. However, many
problems exist concerning hydrogen because it is generally found in its
gaseous form H2 within the analysis chambers and represents a spurious signal
that degrades the chemical sensitivity of the analysis 2,3. Moreover,
hydrogen also participates in surface chemical reactions.
This PhD topic proposes to develop methodological approaches that can target
the quantification of hydrogen, its localization, but also the temporal
spatial imaging of phenomena involving chemical reactions that would take
place at the surface of the analyzed samples.
The candidate will develop techniques for sample preparation and analysis by
Atom Probe Tomography, as well as methods for the exploitation of data from
these experiments, while studying the theory behind field evaporation and the
basics of high field chemistry. He/she should have a good knowledge of solid
state physics and/or surface chemistry.
This thesis is financed within the framework of a Labex EMC3 project
("Quantification and advanced physico-chemical imaging: application to
hydrogen in materials") - (QuantyPhy)
1 Seidman, D., & Stiller, K. (2009). An Atom-Probe Tomography Primer.
MRS Bulletin, 34(10), 717-724. doi:10.1557/mrs2009.194
https: // web.archive.org/web/20190503002941id/https: // www. cambridge.org/...
2 Sundell, G., Thuvander, M., & Andrén, H. O. (2013). Hydrogen analysis
in APT: methods to control adsorption and dissociation of H2. Ultramicroscopy,
132, 285-289.
3 L. Rigutti et al., “Surface Microscopy of Atomic and Molecular Hydrogen
from Field-Evaporating Semiconductors,” J. Phys. Chem. C, vol. 125, no. 31,
pp. 17078–17087, Aug. 2021, doi: 10.1021/acs.jpcc.1c04778
Additional comments
subject to confirmation of funding by the Labex EMC3 within the framework of
the QuantiPHy project.
Web site for additional job details
https: // emploi.cnrs.fr/Offres/Doctorant/UMR6634-CHRVUR-038/Default.aspx
Required Research Experiences
RESEARCH FIELD
Physics
YEARS OF RESEARCH EXPERIENCE
None
Offer Requirements
REQUIRED EDUCATION LEVEL
Physics: Master Degree or equivalent
REQUIRED LANGUAGES
FRENCH: Basic
Contact Information
Organisation/Company: CNRS
Department: Groupe de physique des matériaux
Organisation Type: Public Research Institution
Website: https:// gpm.labos.univ-rouen.fr/
Country: France
City: ST ETIENNE DU ROUVRAY CEDE
