IBM Research Division, Almaden Research Center, San Jose, CA 95120, USA.
Science. 2013 Feb 1;339(6119):557-60. doi: 10.1126/science.1231540.
Extension of nuclear magnetic resonance (NMR) to nanoscale samples has been a longstanding challenge because of the insensitivity of conventional detection methods. We demonstrated the use of an individual, near-surface nitrogen-vacancy (NV) center in diamond as a sensor to detect proton NMR in an organic sample located external to the diamond. Using a combination of electron spin echoes and proton spin manipulation, we showed that the NV center senses the nanotesla field fluctuations from the protons, enabling both time-domain and spectroscopic NMR measurements on the nanometer scale.
将核磁共振（NMR）扩展到纳米级样品一直是一个长期存在的挑战，因为传统检测方法的灵敏度不高。我们展示了利用金刚石中的单个近表面氮空位（NV）中心作为传感器来检测位于金刚石外部的有机样品中的质子 NMR。我们使用电子自旋回波和质子自旋操控的组合，表明 NV 中心可以感应来自质子的纳特斯拉级磁场波动，从而能够在纳米尺度上进行时域和光谱 NMR 测量。
