Modulation of nitrogen vacancy charge state and fluorescence in nanodiamonds using electrochemical potential
Modulation of nitrogen vacancy charge state and fluorescence in nanodiamonds using electrochemical potential
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DOI：
10.1073/pnas.1504451113
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发表时间：
2016-04-12
影响因子：
11.1
通讯作者：
Englund, Dirk
中科院分区：
文献类型：
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作者：
Karaveli, Sinan;Gaathon, Ophir;Englund, Dirk
金刚石中带负电荷的氮空位（NV-）中心在传感和量子信息处理方面有着广泛的应用。为此，最近的工作集中在控制NV电荷状态，其稳定性强烈依赖于其静电环境。在这里，我们证明了具有不同表面终端的纳米金刚石中的单个NV中心的电荷状态和荧光动力学可以通过在电化学电池中外部施加的电势差来控制。NV电荷状态的电压依赖性可用于稳定基于自旋的感测方案的NV状态，并提供电化学势的电荷状态依赖性荧光感测的方法。我们检测到清晰的NV荧光调制的电压变化低至100 mV，一个单一的NV和低至20 mV的多个NV中心在宽场成像模式。这些结果表明，纳米金刚石中的NV中心可以实现生物相关电化学电位的并行光学检测。
The negatively charged nitrogen vacancy (NV-) center in diamond has attracted strong interest for a wide range of sensing and quantum information processing applications. To this end, recent work has focused on controlling the NV charge state, whose stability strongly depends on its electrostatic environment. Here, we demonstrate that the charge state and fluorescence dynamics of single NV centers in nanodiamonds with different surface terminations can be controlled by an externally applied potential difference in an electro-chemical cell. The voltage dependence of the NV charge state can be used to stabilize the NV-state for spin-based sensing protocols and provides a method of charge state-dependent fluorescence sensing of electrochemical potentials. We detect clear NV fluorescence modulation for voltage changes down to 100 mV, with a single NV and down to 20 mV with multiple NV centers in a wide-field imaging mode. These results suggest that NV centers in nanodiamonds could enable parallel optical detection of biologically relevant electrochemical potentials.