[18p-Z13-1~12] 6.2 Carbon-based thin films

▼ [18p-Z13-5] Formation of Nitrogen-Vacancy centers in nanodiamonds: Size and type dependence

〇(D)TzeKit Frederick So^1,2, Alexander I. Shames³, Daiki Terada^1,2, Takuya Genjo^1,2, Hiroki Morishita¹, Izuru Ohki¹, Takeshima Ohshima², Shinobu Onoda², Hideaki Takashima¹, Shigeki Takeuchi², Eiji Osawa⁴, Norikazu Mizuochi¹, Ryuji Igarashi², Masahiro Shirakawa^1,2, Takuya F. Segawa^1,5 (1.Kyoto Univ., 2.QST, 3.Ben-GurionUniv.Negev, 4.NanoCarbon Inst., 5.ETH)

Keywords:Nanodiamonds, Negatively-charged nitrogen-vacancy (NV-)

Negatively-charged nitrogen-vacancy (NV^-) defects in nanodiamonds are a promising nano-scale probe for quantum sensing with excellent bio-compatibility. To maximize the potential of this versatile tool, the smallest type of nanodiamonds that carries NV^- defects are highly desirable and are available in the form of 5-nanometer detonation nanodiamonds (DNDs). Previously, we discovered that the common NV^- formation mechanism may not be applied to DNDs. To investigate the reasons behind this phenomenon, the NV^- formation process is studied experimentally in a series of nanodiamonds with different sizes and origin (DNDs, nanonized high-pressure-high-temperature diamonds), and additional simulations complete the mechanistic understanding.