宽带量子谱仪跟踪铁蛋白纳米磁体的弛豫时间
Tracking Temperature Dependent Relaxation Times of Individual Ferritin Nanomagnets with a Wide-band Quantum Spectrometer
摘要：
我们展示了从低温到室温的整体和个人的磁性铁蛋白蛋白质的自旋动力学的跟踪使用的氮空位色心在金刚石作为磁传感器。我们采用不同的检测方案来探测铁蛋白纳米磁体对氮空位中心的纵向和横向弛豫的影响，这使得能够在从Hz到GHz的宽频率范围内进行磁传感。所观察到的光谱特征的温度依赖性可以很好地理解的铁蛋白的热诱导磁化反转，并使单铁蛋白分子的各向异性势垒的测定。
英文摘要：
We demonstrate the tracking of the spin dynamics of ensemble and individual magnetic ferritin proteins from cryogenic up to room temperature using the nitrogen-vacancy color center in diamond as magnetic sensor. We employ different detection protocols to probe the influence of the ferritin nanomagnets on the longitudinal and transverse relaxation of the nitrogen-vacancy center, which enables magnetic sensing over a wide frequency range from Hz to GHz. The temperature dependence of the observed spectral features can be well understood by the thermally induced magnetization reversals of the ferritin and enables the determination of the anisotropy barrier of single ferritin molecules.
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