Nitrogen-Terminated Diamond Surface for Nanoscale NMR by Shallow Nitrogen-Vacancy Centers

Sora Kawai, Hayate Yamano, Takahiro Sonoda, Kanami Kato, Jorge J. Buendia, Taisuke Kageura, Ryosuke Fukuda, Takuma Okada, Takashi Tanii, Taisei Higuchi, Moriyoshi Haruyama, Keisuke Yamada, Shinobu Onoda, Takeshi Ohshima, Wataru Kada, Osamu Hanaizumi, Alastair Stacey, Tokuyuki Teraji, Shozo Kono, Junichi IsoyaHiroshi Kawarada

研究成果: Article査読

14 被引用数 (Scopus)

抄録

The nitrogen-vacancy (NV) center in diamond is the most promising candidate for quantum sensing because of its beneficial properties. For quantum-sensing applications, a shallow NV center is critical for approximating the sensing target on a diamond surface. Such shallow NV centers are strongly affected by the diamond surface termination. The properties of shallow NV centers in hydrogen-, oxygen-, and fluorine-terminated diamond have been well studied. In recent years, silicon-terminated diamond has also been investigated; however, the effect of silicon-terminated diamond on the properties of shallow NV centers remains unclear. Recently, the suitability of nitrogen-terminated diamond for shallow NV centers has been theoretically and experimentally examined; however, quantum sensing has not yet been performed. In this work, we evaluated the effect of silicon and nitrogen termination on shallow NV centers. The negatively charged state of shallow NV centers was unstable below silicon termination. In contrast, the properties of shallow NV centers in nitrogen-terminated diamond were satisfactory for quantum sensing and enabled 1 H NMR detection. Our results are in good agreement with previous reports on silicon and nitrogen terminations and provide the perspective that the stability of shallow NV centers highly depends on the polarity of electron affinity of the diamond surface.

本文言語English
ページ(範囲)3594-3604
ページ数11
ジャーナルJournal of Physical Chemistry C
123
6
DOI
出版ステータスPublished - 2019 2 14

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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