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

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.
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: http://hdl.handle.net/11572/165179
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