[19p-H103-1~21] 6.2 Carbon-based thin films

[19p-H103-12] Super-high-sensitivity NMR by using NV centers in diamond

〇Junichi Isoya¹, Hitoshi Sumiya², Jochen Scheuer³, Ilai Schwartz³, Qiong Chen³, David Schulze-Suenninghausden⁴, Patrick Carl⁵, Peter Hoefer⁵, Alexander Retzker⁶, Burkhard Luy⁴, Martin Plenio³, Boris Naydenov³, Fedor Jelezko³ (1.Tsukuba Univ., 2.SEI, 3.Ulm Univ., 4.Karlsruhe IT, 5.Bruker, 6.Hebrew Univ.)

Keywords:diamond,NV center,DNP

Enhancing sensitivity is continuously demanded in NMR and MRI which are capable of supplying abundant information in chemistry, biochemistry, medicine, and material science. Electron spins of NV centers in diamond are highly polarized (~96%) by light illumination at room temperature. Strong enhancement of NMR signals is expected if this high polarization is transferred to nuclear spins. By using a pulsed ESR spectrometer, microwave pulse sequence called NOVEL (spin locking with the agreement of Rabi frequency of electron spins and 13C NMR frequency) was applied to a single crystal diamond ([NV]=0.05 ppm, [P1]=0.4 ppm) at room temperature. After transferring the sample to NMR spectrometer, strong 13C-NMR signal has been attained at room temperature. Feasibility using nanodiamond containing NV centers for applications such as DNP reagent and biomarkers traced in vivo by MRI will be discussed.