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Järvinen, J., et al., Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature. Appl. Magn. Reson., 2017. 48(5): p. 473-483.
We present the results of experiments on dynamic nuclear polarization and relaxation of 75As in silicon crystals. Experiments are performed in strong magnetic fields of 4.6 T and temperatures below 1 K. At these conditions donor electron spins are fully polarized, and the allowed and forbidden electron spin resonance transitions are well resolved. We demonstrate effective nuclear polarization of 75As nuclei via the Overhauser effect on the time scale of several hundred seconds. Excitation of the forbidden transitions leads to a polarization through the solid effect. The relaxation rate of donor nuclei has strong temperature dependence characteristic of Orbach process.
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Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature #DNPNMR
From The DNP-NMR Blog:
Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature #DNPNMR
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Järvinen, J., et al., Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature. Appl. Magn. Reson., 2017. 48(5): p. 473-483.
http://dx.doi.org/10.1007/s00723-017-0875-z
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05-02-2017 01:52 AM
Biosilica-Entrapped Enzymes Studied by Using Dynamic Nuclear-Polarization-Enhanced High-Field NMR Spectroscopy #DNPNMR
From The DNP-NMR Blog:
Biosilica-Entrapped Enzymes Studied by Using Dynamic Nuclear-Polarization-Enhanced High-Field NMR Spectroscopy #DNPNMR
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Ravera, E., et al., Biosilica-Entrapped Enzymes Studied by Using Dynamic Nuclear-Polarization-Enhanced High-Field NMR Spectroscopy. ChemPhysChem, 2015. 16(13): p. 2751-2754.
https://www.ncbi.nlm.nih.gov/pubmed/26266832
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03-16-2017 04:38 AM
Temperature dependence of cross-effect dynamic nuclear polarization in rotating solids: advantages of elevated temperatures #DNPNMR
From The DNP-NMR Blog:
Temperature dependence of cross-effect dynamic nuclear polarization in rotating solids: advantages of elevated temperatures #DNPNMR
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Geiger, M.A., et al., Temperature dependence of cross-effect dynamic nuclear polarization in rotating solids: advantages of elevated temperatures. Phys. Chem. Chem. Phys., 2016. 18(44): p. 30696-30704.
https://www.ncbi.nlm.nih.gov/pubmed/27791210
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01-25-2017 11:13 PM
Evidence of spin-temperature in dynamic nuclear polarization: an exact computation of the EPR spectrum #DNPNMR
From The DNP-NMR Blog:
Evidence of spin-temperature in dynamic nuclear polarization: an exact computation of the EPR spectrum #DNPNMR
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Caracciolo, F., et al., Evidence of spin-temperature in dynamic nuclear polarization: an exact computation of the EPR spectrum. Phys Chem Chem Phys, 2016. 18(36): p. 25655-25662.
https://www.ncbi.nlm.nih.gov/pubmed/27711561
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11-19-2016 08:35 PM
[NMR paper] NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field.
NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field.
http://www.bionmr.com//www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--production.springer.de-OnlineResources-Logos-springerlink.gif Related Articles NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field.
J Biomol NMR. 2014 Nov;60(2-3):157-68
Authors: Koers EJ, van der Cruijsen EA, Rosay M, Weingarth M, Prokofyev A, Sauvée C, Ouari O, van der Zwan J, Pongs O, Tordo P, Maas WE, Baldus M
Abstract
...
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06-24-2015 01:08 PM
NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field
From The DNP-NMR Blog:
NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field
Koers, E.J., et al., NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field. J Biomol NMR, 2014. 60(2-3): p. 157-68.
http://www.ncbi.nlm.nih.gov/pubmed/25284462
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11-19-2014 04:32 PM
NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field
NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field
Abstract
Dynamic nuclear polarization (DNP) has become a powerful method to enhance spectroscopic sensitivity in the context of magnetic resonance imaging and nuclear magnetic resonance spectroscopy. We show that, compared to DNP at lower field (400Â*MHz/263Â*GHz), high field DNP (800Â*MHz/527Â*GHz) can significantly enhance spectral resolution and allows exploitation of the paramagnetic relaxation properties of DNP polarizing agents as direct structural...
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10-05-2014 09:01 AM
Temperature dependence of high field 13C dynamic nuclear polarization processes with trityl radicals below 35 Kelvin
From The DNP-NMR Blog:
Temperature dependence of high field 13C dynamic nuclear polarization processes with trityl radicals below 35 Kelvin
Walker, S.A., et al., Temperature dependence of high field 13C dynamic nuclear polarization processes with trityl radicals below 35 Kelvin. Phys. Chem. Chem. Phys., 2013.
http://dx.doi.org/10.1039/C3CP51628H
Dynamic Polarization and Relaxation of 75As Nuclei in Silicon at High Magnetic Field and Low Temperature #DNPNMR
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