13/01/2021

PhD on Developing Microwave/RF Instrumentation for DNP NMR applications on Metal-Organic Frameworks (MOFs)

This job offer has expired


  • ORGANISATION/COMPANY
    Ecole Normale Supérieure
  • RESEARCH FIELD
    ChemistryPhysical chemistry
    EngineeringElectrical engineering
    Physics
  • RESEARCHER PROFILE
    First Stage Researcher (R1)
  • APPLICATION DEADLINE
    01/06/2022 00:00 - Europe/Brussels
  • LOCATION
    France › Paris
  • TYPE OF CONTRACT
    Temporary
  • JOB STATUS
    Full-time
  • HOURS PER WEEK
    35
  • OFFER STARTING DATE
    01/09/2022

OFFER DESCRIPTION

  • In Laboratoire des biomolécules (LBM) - UMR 7203 at ENS Paris, PSL University (rank 1st in France by QS and THE World university rankings 2020)
  • Supervised by Prof. Kong Ooi Tan, co-supervised by Prof. Geoffrey Bodenhausen and Dr. Daniel Abergel
  • Duration: A 3-year contract starting around 9/2022 (latest by 12/2022)
  • Stipend: € 1,400- 1,500 / month
  • Application deadline: Anytime until the position is filled

The main goal of the project is to develop rf and microwave instrumentation for Dynamic Nuclear Polarization (DNP) techniques at high magnetic fields, i.e., 9.4 T/ 400 MHz/ 263 GHz. The candidate will contribute to building a DNP NMR probe with optimized rf & microwave delivery from the source to the sample under cryogenic conditions near 4 K. The array of instruments that has to be built includes microwave waveguides, resonant cavities, and rf resonance circuitry. Hence, candidates with experience in assembling rf and microwave components are highly desirable. Besides, we will build a low-cost EPR circuitry in the same probe to allow the characterization of the DNP polarizing agents using longitudinal detection EPR spectroscopy. In collaboration with the group at ENS of the Institute of Porous Materials of Paris (IMAP), we will apply the DNP technique to study low-gamma nuclei in metal-organic frameworks (MOFs) using both MAS and dissolution DNP spectrometers. Our lab houses an 800 MHz/ 527 GHz MAS-DNP spectrometer, a 600 MHz, a 500 MHz to be installed soon, a 400 MHz, and two dissolution-DNP polarizers (a Bruker prototype at 6.7 T/ 188 GHz and a home-built cryogen-free system at 9.4 T/ 263 GHz). Moreover, we have access to NMR spectrometers that belong to the national high field NMR facilities (IR-RMN-THC). Our lab performs cross-disciplinary research and our current group members have backgrounds in (bio)chemistry, physics, or engineering. We welcome applicants with a diverse but relevant background joining our group. Group website: http://www.paris-en-resonance.fr

 

Application

Please send your CV, a letter of motivation, academic transcripts, and the names of two scientists willing to write recommendation letters to Prof. Kong Ooi Tan (kong-ooi.tan@ens.psl.eu).

References

  1. K. O. Tan, S. Jawla, R. J. Temkin, R. G. Griffin, Pulsed Dynamic Nuclear Polarization, eMagRes, (2019) 339-352
  2. K. O. Tan, M. Mardini, C. Yang, J. H. Ardenkjær-Larsen, R. G. Griffin, Three-spin solid effect and the spin diffusion barrier in amorphous solids, Science Advances 5 (7), eaax2743 (2019)
  3. M. Baudin, B. Vuichoud, A. Bornet, G. Bodenhausen, S. Jannin, A cryogen-consumption-free system for dynamic nuclear polarization at 9.4 T, J. Mag. Res 294 (2018) 115-121
  4. B. Aghelnejad, G. Bodenhausen, S. Marhabaie, A low-temperature Broadband NMR Probe for Multinuclear Cross-Polarization, Chem. Phys. Chem (2019) 2830-2835

More Information

Offer Requirements

Skills/Qualifications

Requirements

You should (1) have a master’s degree in electrical engineering, physics, or physical chemistry with experience in EPR/NMR/DNP; (2) Experience in instrumentation, microwave engineering and LabVIEW are highly desirable; (3) Other desirable skills include MATLAB/Python/C++ programming; (4) Proficient in speaking and writing in English; knowledge of French is a plus but not required.

Work location(s)
1 position(s) available at
Ecole Normale Supérieure
France
Ile de France
Paris
75230
45 rue Ulm

EURAXESS offer ID: 594429

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