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- W3158784416 abstract "Stable ensemble emission from nitrogen vacancy (NV) centers in nanodiamonds (NDs) is highly desirable for diverse areas ranging from bio-imaging to quantum optics. The uniqueness of NV centers lies in their opto-spin properties like energy level structure, emission range (620-850 nm) and optical spin polarization. The host matrix (NDs), however, put some limitation on the photo-physical properties of these color centers. One of the major issues is surface proximity (where high concentration of defects are present) of NV centers. The NV centers being highly sensitive to the neighboring environment are unstable in such circumstances. The surface of NDs mainly exhibit non-diamond carbon which is well-known quencher of emission due to NV centers. The surface composition for desirable photo-physical properties of NV centers is still unknown. Here, we have systemically studied the effect of oxidation time at low oxidation temperature (450 oC) on the selective removal of sp2 carbon, aqueous dispersion of NDs and emission collection due to NV centers at ensemble level. Among different air oxidations, heat treatment at 450 oC at residual time of 8 hours has been found to be suitable air oxidation conditions for the enhancement of brightness and ensemble photo-stability of NV centers." @default.
- W3158784416 created "2021-05-10" @default.
- W3158784416 date "2020-01-01" @default.
- W3158784416 modified "2023-10-18" @default.
- W3158784416 title "Stable ensemble brightness from nitrogen vacancy centers in nanodiamonds through optimized surface composition" @default.
- W3158784416 doi "https://doi.org/10.56042/ijems.v27i6.46846" @default.
- W3158784416 hasPublicationYear "2020" @default.
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