Nanodiamonds are the subject of active research for their potential applications in nano-magnetometry, quantum optics, bioimaging and water cleaning processes. Here, we present a novel thermodynamic model that describes a graphite-liquid-diamond route for the synthesis of nanodiamonds. Its robustness is proved via the production of nanodiamonds powders at room-temperature and standard atmospheric pressure by pulsed laser ablation of pyrolytic graphite in water. The aqueous environment provides a confinement mechanism that promotes diamond nucleation and growth, and a biologically compatible medium for suspension of nanodiamonds. Moreover, we introduce a facile physico-chemical method that does not require harsh chemical or temperature conditions to remove the graphitic byproducts of the laser ablation process. A full characterization of the nanodiamonds by electron and Raman spectroscopies is reported. Our model is also corroborated by comparison with experimental data from the literature.

On the thermodynamic path enabling a room-temperature, laser-assisted graphite to nanodiamond transformation / Gorrini, Federico; Cazzanelli, Massimo; Bazzanella, Nicola; Edla, Raju; Gemmi, M.; Cappello, V.; David, J.; Dorigoni, C.; Bifone, A.; Miotello, Antonio. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - STAMPA. - 6:art. n. 35244(2016), pp. 1-9. [10.1038/srep35244]

On the thermodynamic path enabling a room-temperature, laser-assisted graphite to nanodiamond transformation

Gorrini, Federico;Cazzanelli, Massimo;Bazzanella, Nicola;Edla, Raju;Miotello, Antonio
2016-01-01

Abstract

Nanodiamonds are the subject of active research for their potential applications in nano-magnetometry, quantum optics, bioimaging and water cleaning processes. Here, we present a novel thermodynamic model that describes a graphite-liquid-diamond route for the synthesis of nanodiamonds. Its robustness is proved via the production of nanodiamonds powders at room-temperature and standard atmospheric pressure by pulsed laser ablation of pyrolytic graphite in water. The aqueous environment provides a confinement mechanism that promotes diamond nucleation and growth, and a biologically compatible medium for suspension of nanodiamonds. Moreover, we introduce a facile physico-chemical method that does not require harsh chemical or temperature conditions to remove the graphitic byproducts of the laser ablation process. A full characterization of the nanodiamonds by electron and Raman spectroscopies is reported. Our model is also corroborated by comparison with experimental data from the literature.
2016
art. n. 35244
Gorrini, Federico; Cazzanelli, Massimo; Bazzanella, Nicola; Edla, Raju; Gemmi, M.; Cappello, V.; David, J.; Dorigoni, C.; Bifone, A.; Miotello, Antonio
On the thermodynamic path enabling a room-temperature, laser-assisted graphite to nanodiamond transformation / Gorrini, Federico; Cazzanelli, Massimo; Bazzanella, Nicola; Edla, Raju; Gemmi, M.; Cappello, V.; David, J.; Dorigoni, C.; Bifone, A.; Miotello, Antonio. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - STAMPA. - 6:art. n. 35244(2016), pp. 1-9. [10.1038/srep35244]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/165179
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