期刊
RSC ADVANCES
卷 9, 期 22, 页码 12606-12614出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra02282a
关键词
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资金
- JSPS-KAKENHI [26706007, 26610077, 17H02741, 16K13646, 26220602, 16H04181]
- MEXT-LEADER program
- Osaka City University (OCU)
- Scientific Research on Innovative Areas Innovations for Light-Energy Conversion (I4LEC) [17H06433, 17H0637]
- Grants-in-Aid for Scientific Research [26706007, 16K13646, 17H02741, 26610077] Funding Source: KAKEN
We report on the sensing stability of quantum nanosensors in aqueous buffer solutions for the two detection schemes of quantum decoherence spectroscopy and nanoscale thermometry. The electron spin properties of single nitrogen-vacancy (NV) centers in 25 nm-sized nanodiamonds have been characterized by observing individual nanodiamonds during a continuous pH change from 4 to 11. We have determined the stability of the NV quantum sensors during the pH change as the fluctuations of +/- 12% and +/- 0.2 MHz for the spin coherence time (T-2) and the resonance frequency ((0)) of their mean values, which are comparable to the instrument error of the measurement system. We discuss the importance of characterizing the sensing stability during the pH change and how the present observation affects the measurement scheme of nanodiamond-based NV quantum sensing.
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