期刊
NANO LETTERS
卷 13, 期 7, 页码 3305-3309出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl4015233
关键词
Nanodiamonds; biomolecules; ferritin; nitrogen-vacancy centers; optically detected magnetic resonance
类别
资金
- DFG [SPP1601, SFB TR21]
- EU (DIAMANT)
- DARPA (QUASAR)
- Alexander von Humboldt Foundation
- Marie-Curie fellowship
- FP7
Nanometer-sized diamonds containing nitrogen-vacancy defect centers (NV) are promising nanosensors in biological environments due to their biocompatibility, bright fluorescence, and high magnetic sensitivity at ambient conditions. Here we report on the detection of ferritin molecules using magnetic noise induced by the inner paramagnetic iron as a contrast mechanism. We observe a significant reduction of both coherence and relaxation time due to the presence of ferritin on the surface of nanodiamonds. Our theoretical model is in excellent agreement with the experimental data and establishes this method as a novel sensing technology for proteins.
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