Institut für Theoretische Physik and Center for Integrated Quantum Science and Technology (IQST) , Universität Ulm , Albert-Einstein Allee 11 , 89069 Ulm , Germany.
Racah Institute of Physics , The Hebrew University of Jerusalem , Jerusalem , 91904 Givat Ram , Israel.
Nano Lett. 2018 Mar 14;18(3):1882-1887. doi: 10.1021/acs.nanolett.7b05175. Epub 2018 Feb 28.
Efficient polarization of organic molecules is of extraordinary relevance when performing nuclear magnetic resonance (NMR) and imaging. Commercially available routes to dynamical nuclear polarization (DNP) work at extremely low temperatures, relying on the solidification of organic samples and thus bringing the molecules out of their ambient thermal conditions. In this work, we investigate polarization transfer from optically pumped nitrogen vacancy centers in diamond to external molecules at room temperature. This polarization transfer is described by both an extensive analytical analysis and numerical simulations based on spin bath bosonization and is supported by experimental data in excellent agreement. These results set the route to hyperpolarization of diffusive molecules in different scenarios and consequently, due to an increased signal, to high-resolution NMR.
当进行核磁共振（NMR）和成像时，高效极化有机分子具有非常重要的意义。商业上可用于动态核极化（DNP）的方法在极低温度下工作，依赖于有机样品的固化，从而使分子脱离其环境热条件。在这项工作中，我们研究了在室温下从金刚石中光学泵浦的氮空位中心向外部分子的极化转移。这种极化转移由基于自旋浴玻色化的广泛分析和数值模拟来描述，并得到了实验数据的极好支持。这些结果为在不同情况下对扩散分子进行超极化铺平了道路，从而由于信号增强，实现了高分辨率 NMR。
