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Burning and graphitization of optically levitated nanodiamonds in vacuum
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Rahman, A. T. M. A., Frangeskou, Angelo, Kim, M. S., Bose, S, Morley, Gavin and Barker, P. F. (2016) Burning and graphitization of optically levitated nanodiamonds in vacuum. Scientific Reports, 6 . 21633. doi:10.1038/srep21633 ISSN 2045-2322.
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Official URL: http://dx.doi.org/10.1038/srep21633
Abstract
A nitrogen-vacancy (NV−) centre in a nanodiamond, levitated in high vacuum, has recently been proposed as a probe for demonstrating mesoscopic centre-of-mass superpositions and for testing quantum gravity. Here, we study the behaviour of optically levitated nanodiamonds containing NV− centres at sub-atmospheric pressures and show that while they burn in air, this can be prevented by replacing the air with nitrogen. However, in nitrogen the nanodiamonds graphitize below ≈10 mB. Exploiting the Brownian motion of a levitated nanodiamond, we extract its internal temperature (Ti) and find that it would be detrimental to the NV− centre’s spin coherence time. These values of Ti make it clear that the diamond is not melting, contradicting a recent suggestion. Additionally, using the measured damping rate of a levitated nanoparticle at a given pressure, we propose a new way of determining its size.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Nanodiamonds -- Experiments, Quantum theory, Microphysics | ||||||||
| Journal or Publication Title: | Scientific Reports | ||||||||
| Publisher: | Nature Publishing Group | ||||||||
| ISSN: | 2045-2322 | ||||||||
| Official Date: | 22 January 2016 | ||||||||
| Dates: |
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| Volume: | 6 | ||||||||
| Article Number: | 21633 | ||||||||
| DOI: | 10.1038/srep21633 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 31 May 2016 | ||||||||
| Date of first compliant Open Access: | 31 May 2016 | ||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Royal Society (Great Britain) | ||||||||
| Grant number: | EP/ J014664/1, EP/M003019/1, EP/M013243/1 | ||||||||
| Adapted As: |
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