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Five-Nanometer Diamond with Luminescent Nitrogen-Vacancy Defect Centers / Bradley R Smith, David W Inglis, Bjornar Sandnes, James R Rabeau, Andrei V Zvyagin, Daniel Gruber, Christopher J Noble, Robert Vogel, Eiji Ōsawa, Taras Plakhotnik
Small, Volume: 5, Issue: 14, Pages: 1649 - 1653
Swansea University Author: Bjornar Sandnes
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Five-Nanometer Diamond with Luminescent Nitrogen-Vacancy Defect Centers
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The paper demonstrated for the first time the existence of luminescent Nitrogen-Vacancy (NV) centres in nanodiamond particles as small as 5 nm. This result was surprising and important as there was growing concern in the science community that inherent physical barriers prevented formation of such colour centres. NV centres were generated by proton irradiation, and quantified using spectral and time-gated luminescence detection. A simple model explained the statistics of NV formation probability versus size. Sub-10 nm luminescent nanodiamonds are of considerable interest for biomedical applications and quantum technologies.
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