Spin relaxometry of single nitrogen-vacancy defects in diamond nanocrystals for magnetic noise sensing
By Jean‐Philippe Tetienne, T. Hingant, L. Rondin, A. Cavaillès, L. Mayer, G. Dantelle, Thierry Gacoin, J. Wrachtrup, Jean-François Roch, Vincent Jacques. 2013
170 citations recorded by the source corpus.
We report an experimental study of the longitudinal relaxation time (${T}_{1}$) of the electron spin associated with single nitrogen-vacancy (NV) defects hosted in nanodiamonds (NDs). We first show that ${T}_{1}$ decreases over three orders of magnitude when the ND size is reduced from 100 to 10 nm owing to the interaction of the NV electron spin with a bath of paramagnetic centers lying on the ND surface. We next tune the magnetic environment by decorating the ND surface with Gd${}^{3+}$ ions and observe an efficient ${T}_{1}$ quenching, which demonstrates magnetic noise sensing with a single electron spin. We estimate a sensitivity down to $\ensuremath{\approx}14$ electron spins detected within 10 s, using a single NV defect hosted in a 10-nm-size ND. These results pave the way towards ${T}_{1}$-based nanoscale imaging of the spin density in biological samples.
View Paper: https://www.semanticscholar.org/paper/b58638fe9ba6fa8d43c5d05df397c2d8ec830c68
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Citations in the corpus
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- Nitrogen-vacancy centers in diamond: nanoscale sensors for physics and biology. (2014, background): “Reduction in spin relaxation times has been observed for nanodiamonds smaller than ∼50 nm (99) and for thin-film defects less than ∼10 nm from the surface (26).”