Unknown

Dataset Information

0

Time-optimized pulsed dynamic nuclear polarization.


ABSTRACT: Pulsed dynamic nuclear polarization (DNP) techniques can accomplish electron-nuclear polarization transfer efficiently with an enhancement factor that is independent of the Zeeman field. However, they often require large Rabi frequencies and, therefore, high-power microwave irradiation. Here, we propose a new low-power DNP sequence for static samples that is composed of a train of microwave pulses of length ?p spaced with delays d. A particularly robust DNP condition using a period ?m = ?p + d set to ~1.25 times the Larmor period ?Larmor is investigated which is a time-optimized pulsed DNP sequence (TOP-DNP). At 0.35 T, we obtained an enhancement of ~200 using TOP-DNP compared to ~172 with nuclear spin orientation via electron spin locking (NOVEL), a commonly used pulsed DNP sequence, while using only ~7% microwave power required for NOVEL. Experimental data and simulations at higher fields suggest a field-independent enhancement factor, as predicted by the effective Hamiltonian.

SUBMITTER: Tan KO 

PROVIDER: S-EPMC6357739 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC11202326 | biostudies-literature
| S-EPMC9286509 | biostudies-literature
| S-EPMC3922122 | biostudies-literature
| S-EPMC4762658 | biostudies-literature
| S-EPMC3265031 | biostudies-other
| S-EPMC3459188 | biostudies-literature
| S-EPMC3578289 | biostudies-literature
| S-EPMC2980755 | biostudies-literature
| S-EPMC7015119 | biostudies-literature
| S-EPMC5464406 | biostudies-literature