Quantum diamond spectrometer for nanoscale NMR and ESR spectroscopy
Quantum diamond spectrometer for nanoscale NMR and ESR spectroscopy
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DOI：
10.1038/s41596-019-0201-3
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发表时间：
2019-09-01
期刊：
影响因子：
14.8
通讯作者：
Walsworth, Ronald L.
中科院分区：
文献类型：
--
作者：
Bucher, Dominik B.;Craik, Diana P. L. Aude;Walsworth, Ronald L.
金刚石中的氮空位(NV)量子缺陷是敏感的磁场探测器。由于它们的原子尺寸和光学读出能力，它们已被用于金刚石表面纳米级样品的磁共振光谱。在这里，我们提出了一种协议，用于制造NV钻石芯片，以及用于构建和操作简单、低成本的用于执行纳米级体积的核磁共振和电子自旋共振(ESR)谱的“量子钻石光谱仪”。该仪器基于一种商业上可获得的钻石芯片，在钻石表面以下-10纳米的深度将NV整体离子注入其中。该光谱仪在低磁场(-300G)下运行，需要标准的光学和微波(MW)组件来进行NV自旋准备、操纵和读出。我们展示了这种装置在纳米尺度的质子和氟核磁共振光谱中的应用，以及通过弛豫法检测过渡金属。我们估计，完整的议定书需要2-3个月的时间来实施，这取决于设备、钻石衬底和用户体验的可用性。
Nitrogen-vacancy (NV) quantum defects in diamond are sensitive detectors of magnetic fields. Owing to their atomic size and optical readout capability, they have been used for magnetic resonance spectroscopy of nanoscale samples on diamond surfaces. Here, we present a protocol for fabricating NV diamond chips and for constructing and operating a simple, low-cost 'quantum diamond spectrometer' for performing NMR and electron spin resonance (ESR) spectroscopy in nanoscale volumes. The instrument is based on a commercially available diamond chip, into which an NV ensemble is ion-implanted at a depth of -10 nm below the diamond surface. The spectrometer operates at low magnetic fields (-300 G) and requires standard optical and microwave (MW) components for NV spin preparation, manipulation, and readout. We demonstrate the utility of this device for nanoscale proton and fluorine NMR spectroscopy, as well as for the detection of transition metals via relaxometry. We estimate that the full protocol requires 2-3 months to implement, depending on the availability of equipment, diamond substrates, and user experience.