Research activity on effective production methods of nanodiamonds (NDs) containing controlled number, in specific lattice sites, of negatively charged nitrogen-vacancy (NV−) centers, plays an important role in materials science because of the large number of application fields. Indeed, because of their unique properties, NV-doped NDs have been proposed for applications in bio-imaging, quantum computing, and as nano-sensors for surroundings physical parameters (temperature, electric and magnetic fields, etc.). Here, we demonstrate the production of nanometric-sized fluorescent NDs through pulsed laser ablation (PLA) of a graphite target immersed in liquid nitrogen without the need of any post-process activation. This achievement represents a relevant development compared to the standard synthesis of NV-embedded NDs. Evidence of the NDs formation is given by selected area electron diffraction, while the presence of NV− centers in NDs is proved by optically detected magnetic resonance spectroscopy. Furthermore, a thermodynamic model is reported that explains diamond phase formation in strong undercooling conditions as well as nitrogen doping. Finally, a comparison between present results and our recent findings on pulsed laser deposition of NDs in N2 atmosphere is performed to confirm that a post-process for fluorescence activation is not necessary

On the route towards a facile fluorescent nanodiamonds laser-synthesis / Basso, L; Bazzanella, N; Cazzanelli, M; Miotello, A. - In: CARBON. - ISSN 0008-6223. - STAMPA. - 153:(2019), pp. 148-155. [10.1016/j.carbon.2019.07.025]

On the route towards a facile fluorescent nanodiamonds laser-synthesis

Basso L;Bazzanella N;Cazzanelli M;Miotello A
2019-01-01

Abstract

Research activity on effective production methods of nanodiamonds (NDs) containing controlled number, in specific lattice sites, of negatively charged nitrogen-vacancy (NV−) centers, plays an important role in materials science because of the large number of application fields. Indeed, because of their unique properties, NV-doped NDs have been proposed for applications in bio-imaging, quantum computing, and as nano-sensors for surroundings physical parameters (temperature, electric and magnetic fields, etc.). Here, we demonstrate the production of nanometric-sized fluorescent NDs through pulsed laser ablation (PLA) of a graphite target immersed in liquid nitrogen without the need of any post-process activation. This achievement represents a relevant development compared to the standard synthesis of NV-embedded NDs. Evidence of the NDs formation is given by selected area electron diffraction, while the presence of NV− centers in NDs is proved by optically detected magnetic resonance spectroscopy. Furthermore, a thermodynamic model is reported that explains diamond phase formation in strong undercooling conditions as well as nitrogen doping. Finally, a comparison between present results and our recent findings on pulsed laser deposition of NDs in N2 atmosphere is performed to confirm that a post-process for fluorescence activation is not necessary
2019
Basso, L; Bazzanella, N; Cazzanelli, M; Miotello, A
On the route towards a facile fluorescent nanodiamonds laser-synthesis / Basso, L; Bazzanella, N; Cazzanelli, M; Miotello, A. - In: CARBON. - ISSN 0008-6223. - STAMPA. - 153:(2019), pp. 148-155. [10.1016/j.carbon.2019.07.025]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/248947
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