论文标题
在具有高温电子辐照的钻石颗粒中氮的有效转化为氮呈现中心
Efficient Conversion of Nitrogen to Nitrogen-Vacancy Centers in Diamond Particles with High-Temperature Electron Irradiation
论文作者
论文摘要
荧光纳米符号含有负收集的氮态（NV $^ - $）中心有望用于多种应用，例如感应，荧光生物标志物或超极化核自旋。 NV $^ - $中心由钻石晶格中的替代氮（P1中心）缺陷和空缺形成。最大化NVS的浓度是最有益的，这证明了从P1到NV $^ - $的搜索方法的搜索合理。我们在这里报告表面清洁的荧光微孔和纳米座，通过用高能量（10 MEV）电子的商用钻石粉末辐射获得，并在800°C下同时退火。使用此技术并增加了辐照剂量，我们证明了NV $^ - $的创建，转化率最高为25％。最后，我们监视了微载体颗粒中辐射诱导的自旋1缺陷的创建，我们与W16和W33中心相关联，并研究了辐射剂量和粒径对NV $^ - $相干时间的影响。
Fluorescent nanodiamonds containing negatively-charged nitrogen-vacancy (NV$^-$) centers are promising for a wide range of applications, such as for sensing, as fluorescence biomarkers, or to hyperpolarize nuclear spins. NV$^-$ centers are formed from substitutional nitrogen (P1 centers) defects and vacancies in the diamond lattice. Maximizing the concentration of NVs is most beneficial, which justifies the search for methods with a high yield of conversion from P1 to NV$^-$. We report here the characterization of surface cleaned fluorescent micro- and nanodiamonds, obtained by irradiation of commercial diamond powder with high-energy (10 MeV) electrons and simultaneous annealing at 800°C. Using this technique and increasing the irradiation dose, we demonstrate the creation of NV$^-$ with up to 25 % conversion yield. Finally, we monitor the creation of irradiation-induced spin-1 defects in microdiamond particles, which we associate with W16 and W33 centers, and investigate the effects of irradiation dose and particle size on the coherence time of NV$^-$.
