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Physicists/Electrical Engineers wanted to Develop Microwave/RF Instrumentation for DNP NMR applications


   Department of Chemistry

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  Prof Kong Ooi Tan  Applications accepted all year round  Funded PhD Project (Students Worldwide)

About the Project

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 (physicists, electrical engineers, or physical chemists) joining our group. Personal (https://www.chimie.ens.fr/tan/) and group websites (https://www.chimie.ens.fr/recherche/laboratoire-lbm/structure-and-dynamics-of-biomolecules/) are given here.

To apply for the PhD position, please combine your CV, a motivation letter, and reference letters (if available) into a single PDF, and upload it below.


Funding Notes

This is a fully funded PhD position for all nationalities and disciplines. We welcome applicants from a Physics, Physical Chemistry, or Electrical and Electronics Engineering background.

References

K. O. Tan, S. Jawla, R. J. Temkin, R. G. Griffin, Pulsed Dynamic Nuclear Polarization, eMagRes, (2019) 339-352
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)
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
B. Aghelnejad, G. Bodenhausen, S. Marhabaie, A low-temperature Broadband NMR Probe for Multinuclear Cross-Polarization, Chem. Phys. Chem (2019) 2830-2835
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