Room-temperature hyperpolarization of polycrystalline samples with optically polarized triplet electrons: pentacene or nitrogen-vacancy center in diamond?

Miyanishi, Koichiro; Segawa, Takuya F.; Takeda, Kazuyuki; Ohki, Izuru; Onoda, Shinobu; Ohshima, Takeshi; Abe, Hiroshi; Takashima, Hideaki; Takeuchi, Shigeki; Shames, Alexander I.; Morita, Kohki; Wang, Yu; So, Frederick T.-K.; Terada, Daiki; Igarashi, Ryuji; Kagawa, Akinori; Kitagawa, Masahiro; Mizuochi, Norikazu; Shirakawa, Masahiro; Negoro, Makoto

doi:https://doi.org/10.5194/mr-2-33-2021

Articles | Volume 2, issue 1

https://doi.org/10.5194/mr-2-33-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Geoffrey Bodenhausen Festschrift

https://doi.org/10.5194/mr-2-33-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 2, issue 1

Research article

|

17 Feb 2021

Research article |

| 17 Feb 2021

Room-temperature hyperpolarization of polycrystalline samples with optically polarized triplet electrons: pentacene or nitrogen-vacancy center in diamond?

Koichiro Miyanishi, Takuya F. Segawa, Kazuyuki Takeda, Izuru Ohki, Shinobu Onoda, Takeshi Ohshima, Hiroshi Abe, Hideaki Takashima, Shigeki Takeuchi, Alexander I. Shames, Kohki Morita, Yu Wang, Frederick T.-K. So, Daiki Terada, Ryuji Igarashi, Akinori Kagawa, Masahiro Kitagawa, Norikazu Mizuochi, Masahiro Shirakawa, and Makoto Negoro

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Final revised paper (published on 17 Feb 2021)
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Preprint (discussion started on 15 Dec 2020)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'review of Miyanishi et al', Jeffrey Reimer, 03 Jan 2021
SC1: 'Comment on mr-2020-36', Nino Wili, 05 Jan 2021
RC2: 'Review: Myanishi, K. et al.', Anonymous Referee #2, 09 Jan 2021
SC2: 'Comment on mr-2020-36', Martin Plenio, 10 Jan 2021
AC1: 'Author Comment on mr-2020-36', Takuya Segawa, 21 Jan 2021

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Takuya Segawa on behalf of the Authors (21 Jan 2021) Author's response Author's tracked changes Manuscript

ED: Publish as is (25 Jan 2021) by Konstantin Ivanov (deceased)

Short summary

We show ¹³C spin hyperpolarization using laser irradiation at room temperature in two different systems: 1. pentacene doped in organic crystals of benzoic acid and 2. nitrogen-vacancy (NV) color centers in microdiamonds. The ¹³C NMR signal was enhanced by a factor of > 3000 using pentacene and > 300 using NV centers as polarization sources. We analyze the pros and cons of these two systems and discuss their prospects for room-temperature enhancement of NMR signals.