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Open AccessFeature PaperArticle

Laser-Synthesis of NV-Centers-Enriched Nanodiamonds: Effect of Different Nitrogen Sources

1
Department of Physics, University of Trento, via Sommarive 14, 38123 Povo, Italy
2
Center for Neuroscience and Cognitive Systems, Istituto Italiano di Tecnologia, corso Bettini 31, 38068 Rovereto, Italy
3
Department of Drug Science and Technology, University of Torino, corso Raffaello 30, 10125 Torino, Italy
4
Department of Molecular Biotechnologies and Health Sciences, University of Torino, via Nizza 52, 10126 Torino, Italy
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(6), 579; https://doi.org/10.3390/mi11060579
Received: 27 May 2020 / Revised: 6 June 2020 / Accepted: 8 June 2020 / Published: 9 June 2020
(This article belongs to the Section D:Materials and Processing)
Due to the large number of possible applications in quantum technology fields—especially regarding quantum sensing—of nitrogen-vacancy (NV) centers in nanodiamonds (NDs), research on a cheap, scalable and effective NDs synthesis technique has acquired an increasing interest. Standard production methods, such as detonation and grinding, require multistep post-synthesis processes and do not allow precise control in the size and fluorescence intensity of NDs. For this reason, a different approach consisting of pulsed laser ablation of carbon precursors has recently been proposed. In this work, we demonstrate the synthesis of NV-fluorescent NDs through pulsed laser ablation of an N-doped graphite target. The obtained NDs are fully characterized in the morphological and optical properties, in particular with optically detected magnetic resonance spectroscopy to unequivocally prove the NV origin of the NDs photoluminescence. Moreover, to compare the different fluorescent NDs laser-ablation-based synthesis techniques recently developed, we report an analysis of the effect of the medium in which laser ablation of graphite is performed. Along with it, thermodynamic aspects of the physical processes occurring during laser irradiation are analyzed. Finally, we show that the use of properly N-doped graphite as a target for laser ablation can lead to precise control in the number of NV centers in the produced NDs. View Full-Text
Keywords: nitrogen-vacancy center; nanodiamonds; laser ablation; optically detected magnetic resonance nitrogen-vacancy center; nanodiamonds; laser ablation; optically detected magnetic resonance
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MDPI and ACS Style

Basso, L.; Sacco, M.; Bazzanella, N.; Cazzanelli, M.; Barge, A.; Orlandi, M.; Bifone, A.; Miotello, A. Laser-Synthesis of NV-Centers-Enriched Nanodiamonds: Effect of Different Nitrogen Sources. Micromachines 2020, 11, 579.

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