标题： 近红外激光捕获的荧光纳米金刚石传感 显示英文标题

标题： Sensing with near-infrared laser trapped fluorescent nanodiamonds

摘要： 基于光学捕获的荧光纳米金刚石的生物传感是一个有吸引力的研究方向，有望解决活细胞内的生化过程。 为了达到这一目标，我们研究了1064 nm波长的近红外（NIR）激光照射对含有氮空位（NV）中心的荧光纳米金刚石（FNDs）的影响。 通过进行综合实验，我们的目标是了解NIR照射如何影响FNDs的荧光和传感特性，并确定其在各种传感应用中的潜在意义。 实验设置包括将FNDs暴露于不同强度的NIR激光光，并分析其光学和物理性质的变化。 关键测量包括T1弛豫时间、光学光谱和光学检测磁共振（ODMR）光谱。 研究结果表明，增加的NIR激光功率与ODMR中心频率的变化相关，但也发现NV中心在NIR照射下的电荷态动力学也起到一定作用。 我们提出了结合NIR和绿光的协议，以减轻NIR的影响，并证明使用这种协议的FND生物传感效果良好。 显示英文摘要

摘要： Biosensing based on optically trapped fluorescent nanodiamonds is an intriguing research direction potentially allowing to resolve biochemical processes inside living cells. Towards this goal, we investigate infrared near (NIR) laser irradiation at 1064 nm on fluorescent nanodiamonds (FNDs) containing nitrogen-vacancy (NV) centers. By conducting comprehensive experiments, we aim to understand how NIR exposure influences the fluorescence and sensing properties of FNDs and to determine the potential implications for the use of FNDs in various sensing applications. The experimental setup involved exposing FNDs to varying intensities of NIR laser light and analyzing the resultant changes in their optical and physical properties. Key measurements included T1 relaxation times, optical spectroscopy, and optically detected magnetic resonance (ODMR) spectra. The findings reveal how increased NIR laser power correlates with alterations in ODMR central frequency but also that charge state dynamics under NIR irradiation of NV centers plays a role. We suggest protocols with NIR and green light that mitigate the effect of NIR, and demonstrate that FND biosensing works well with such a protocol.