Nuclear spin polarization transfer across an organic-semiconductor interface

Goehring, L. ORCID: 0000-0002-3858-7295 and Michal, C.A., 2003. Nuclear spin polarization transfer across an organic-semiconductor interface. Journal of Chemical Physics, 119 (19), p. 10325. ISSN 0021-9606

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Motivated by Tycko’s proposal to harness optically pumped nuclear spinpolarization for the enhancement of nuclear magnetic resonance(NMR) signals from biological macromolecules, we investigate the transfer of thermal nuclear spinpolarization between 1H or 19F in an organic overlayer and 31P at the surface of micron-sized InP particles by Hartmann–Hahn cross polarization. Comparison with analytic and numerical models indicates that the total quantity of polarization transferred across the semiconductor-organic interface is limited by the relatively short room-temperature 1H T1ρ (11 ms) and the slow diffusion of nuclear spinpolarization in the semiconductor.Models and spin-counting experiments indicate that we are able to transfer approximately 20% of the total nuclear spinpolarization originating in the organic overlayer to the semiconductor, supporting the feasibility of transferred optically pumped NMR.

Item Type: Journal article
Publication Title: Journal of Chemical Physics
Creators: Goehring, L. and Michal, C.A.
Publisher: AIP Publishing
Date: 15 November 2003
Volume: 119
Number: 19
ISSN: 0021-9606
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 06 Sep 2016 10:41
Last Modified: 16 Oct 2017 14:21

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