论文标题
使用钻石中的氮 - 视口中心传感电化学信号
Sensing electrochemical signals using a nitrogen-vacancy center in diamond
论文作者
论文摘要
具有高灵敏度的化学传感器可以在极端条件下使用并且可以小型化的化学传感器在科学和工业中具有很高的兴趣。钻石中的氮呈（NV）中心是纳米传感器的理想候选者，因为其电子自旋的长度连贯性和光学可访问性。在这项理论工作中，我们建议使用NV中心检测从电解质溶液中出现的电化学信号，从而获得浓度传感器。为此，我们建议将NV中心的电子自旋的不均匀去率（$ 1/t^*_ 2 $）作为信号。我们表明，对于大部分电解质溶液中的一系列平均离子浓度，由离子局部浓度的扩散波动产生的电场波动产生，从而导致可以从自由感应衰减测量值推断出的降低速率。此外，我们表明，对于一系列浓度，在NV中心位置产生的电场也可以用于估计离子的浓度。
Chemical sensors with high sensitivity that can be used in extreme conditions and can be miniaturized are of high interest in science and industry. The Nitrogen-vacancy (NV) center in diamond is an ideal candidate as a nanosensor due to the long coherence time of its electron spin and its optical accessibility. In this theoretical work, we propose to use an NV center to detect electrochemical signals emerging from an electrolyte solution, thus obtaining a concentration sensor. For this purpose, we propose to use the inhomogeneous dephasing rate of the electron spin of the NV center ($1/T^*_2$) as a signal. We show that for a range of mean ionic concentrations in the bulk of the electrolyte solution, the electric field fluctuations produced by the diffusional fluctuations in the local concentration of ions, result in dephasing rates which can be inferred from free induction decay measurements. Moreover, we show that for a range of concentrations, the electric field generated at the position of the NV center can also be used to estimate the concentration of ions.
