Journal
AIP ADVANCES
Volume 4, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4870938
Keywords
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Funding
- National Basic Research Program of China [2013CB921800, 2011CB921400]
- Natural Science Foundation of China [11374280, 50772110]
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We investigated the influence of spins on surface of nanodiamonds (NDs) to the longitudinal relaxation time (T-1) and transverse relaxation time (T-2) of nitrogen vacancy (NV) centers in ND. A spherical model of the NDs was suggested to account for the experimental results of T-1 and T-2, and the density of surface spins was roughly estimated based on the statistical analysis of experimental results of 72 NDs containing a single NV center. For NDs studied here, the T-1 of NV center inside is highly dependent to the surface spins of the NDs. However, for the T-2 of NV center, intrinsic contributions must be much pronounced than that by surface spins. In other words, T-1 of an NV center in NDs is more sensitive to the change of the surface spin density than T-2. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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