DSM : Thesis SL-DSM-14-0411

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Research field

Radiation-matter interactions / Solid state physics, chemistry and nanosciences
Solid state physics, surfaces and interfaces / Solid state physics, chemistry and nanosciences

Title

Cryogenic Magic Angle Spinning Dynamic Nuclear Polarization: sensitivity enhanced Nuclear Magnetic Resonance for nano-characterization.

Abstract

Context: Cryogenic Magic Angle Spinning Dynamic Nuclear Polarization: sensitivity enhanced Nuclear Magnetic Resonance for nano-characterization



The SCIB at INAC (Institute for Nanosciences and Cryogenics, CEA Grenoble) has a PhD opening for a physicist or physical-chemist. This PhD deals with the development of an advanced atomic-level characterisation technique, namely solid-state DNP (Dynamic Nuclear Polarization) enhanced NMR (Nuclear Magnetic Resonance) in a new range of temperature (10-100 K) so far not accessible.

Up to now, the main strategy to circumvent the sensitivity problem in NMR (Nuclear Magnetic Resonance) has consisted in progressively going to higher magnetic fields (up to 23 Tesla nowadays). Nevertheless, this is not a sufficient solution for a large number of studies including large bio-molecules, and systems of interest for nanosciences, catalysis, etc. Complementary approaches based on nuclear hyper-polarization techniques which are able to provide orders of magnitude sensitivity increase (2 to 5) are thus required to broaden the scope of magnetic resonance studies.

The SCIB laboratory is pioneering the development of such a technique, high field Dynamic Nuclear Polarization, and is currently operating the first High Field DNP experiment in France (since September 2011). The lab is also strongly involved in new instrumentation development (Coll. SBT/INAC) to allow access to very low temperature DNP measurements and has developed several original methods to enhance spectral resolution and extract structurally relevant constraints in solid-state NMR. Notably we recently succeeded in performing Magic Angle Spinning using cooled helium gas down to 15 K.

The primary goal of the project is to go beyond the current state of the art by developing a pioneering experiment able to perform high resolution (magic angle spinning) solid-state Dynamic Nuclear Polarization at cryogenic temperatures (10 ? 100 K) and high magnetic field (10 Tesla). This has never been done before and should enable orders of magnitude of additional sensitivity gain and corresponding time savings. The relevance of this approach will be tested on several systems of significant interest for the fields of nano-electronics, catalysis, and structural biology (i.e. functionalized nano-particles, porous materials, bio-molecular systems).

Location

Institut nanosciences et cryogénie
Service de Chimie Inorganique et Biologique
Laboratoire de Résonance Magnétique
Centre : Grenoble
Starting date : 01/10/2013

Contact person

GAEL DE PAEPE
CEA / DSM/INAC/SCIB/RM
INAC/SCIB/RM

CEA Grenoble

17 rue des Martyrs

38054 Grenoble cedex 9
Phone : 04 38 78 65 70

More about

http://inac.cea.fr/Pisp/gael.depaepe/

University / Graduate School

Grenoble I (UJF)
Chimie et Sciences du Vivant (EDCSV) - Grenoble I -

Thesis supervisor

Michel BARDET
CEA / DSM/INAC/SCIB/RM
INAC/SCIB/RM

CEA Grenoble

17 rue des Martyrs

38054 Grenoble cedex 9


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