Observation of dynamic nuclear polarization echoes

Nino Wili*, Anders B Nielsen, José P Carvalho, Niels Chr Nielsen*

*Corresponding author af dette arbejde

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Abstract

It is demonstrated that the time evolution of the electron-nuclear polarization transfer process during pulsed dynamic nuclear polarization (DNP) can be reversed on a microsecond timescale, leading to the observation of DNP echoes. The DNP echoes are induced by consecutive application of two pulse trains that produce effective Hamiltonians that differ only in the sign of the effective hyperfine coupling. The experiments have been performed on a frozen solution of trityl radicals in water/glycerol on a homebuilt X-band electron paramagnetic resonance/DNP spectrometer at 80 kelvins. We envisage that DNP echoes will play an important role in future development of pulsed DNP for sensitivity-enhanced nuclear magnetic resonance, hyperfine spectroscopy, and quantum sensing.

OriginalsprogEngelsk
Artikelnummereadr2420
TidsskriftScience Advances
Vol/bind10
Nummer42
Antal sider5
ISSN2375-2548
DOI
StatusUdgivet - 18 okt. 2024

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