Nanodiamonds (NDs) containing negatively charged Nitrogen-Vacancy (NV) centers are promising materials for applications in photonics, quantum computing, and sensing of environmental parameters like temperature, strain and magnetic !elds. However, the production of "uorescent NDs remains a tech- nological challenge, requiring a complex multi-step process involving controlled introduction of substitu- tional nitrogen into the diamond lattice, annealing and fragmentation from macrocrystals to nanocrystals. Here, we report on a single-step, all-optical process for the production of nanometric-sized "uorescent diamonds based on laser ablation of a carbon substrate at low temperature (100 °C) under a nitrogen atmosphere. We demonstrate that this synthesis route yields "uorescent NDs with a concentration of native NV centers controlled by adjusting the experimental ablation conditions. Spin-polarization depen- dent optical-transitions are observed by optically detected magnetic resonance spectroscopy, thus pro- viding strong evidence of the presence of negatively charged NV centers in the as-grown NDs. Finally, we propose a thermodynamic model able to describe the nucleation of NDs and the formation of NV centers in the present single-step optical process.

An all-optical single-step process for production of nanometric-sized !uorescent diamonds / Basso, L.; Gorrini, F.; Cazzanelli, M.; Bazzanella, N.; Bifone, A.; Miotello, A.. - In: NANOSCALE. - ISSN 2040-3372. - STAMPA. - 10:(2018), pp. 5738-5744. [10.1039/c7nr08791h]

An all-optical single-step process for production of nanometric-sized !uorescent diamonds

L. Basso;F. Gorrini;M. Cazzanelli;N. Bazzanella;A. Miotello
2018

Abstract

Nanodiamonds (NDs) containing negatively charged Nitrogen-Vacancy (NV) centers are promising materials for applications in photonics, quantum computing, and sensing of environmental parameters like temperature, strain and magnetic !elds. However, the production of "uorescent NDs remains a tech- nological challenge, requiring a complex multi-step process involving controlled introduction of substitu- tional nitrogen into the diamond lattice, annealing and fragmentation from macrocrystals to nanocrystals. Here, we report on a single-step, all-optical process for the production of nanometric-sized "uorescent diamonds based on laser ablation of a carbon substrate at low temperature (100 °C) under a nitrogen atmosphere. We demonstrate that this synthesis route yields "uorescent NDs with a concentration of native NV centers controlled by adjusting the experimental ablation conditions. Spin-polarization depen- dent optical-transitions are observed by optically detected magnetic resonance spectroscopy, thus pro- viding strong evidence of the presence of negatively charged NV centers in the as-grown NDs. Finally, we propose a thermodynamic model able to describe the nucleation of NDs and the formation of NV centers in the present single-step optical process.
Basso, L.; Gorrini, F.; Cazzanelli, M.; Bazzanella, N.; Bifone, A.; Miotello, A.
An all-optical single-step process for production of nanometric-sized !uorescent diamonds / Basso, L.; Gorrini, F.; Cazzanelli, M.; Bazzanella, N.; Bifone, A.; Miotello, A.. - In: NANOSCALE. - ISSN 2040-3372. - STAMPA. - 10:(2018), pp. 5738-5744. [10.1039/c7nr08791h]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/222906
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