Abstract

In the present work, laser ablation of a graphite target submerged inpure water was tested as a methodology for the production of carbon-basednanoparticles. The effect of varying the external pressure imposed to the liquidwas investigated for the first time, in the range from 1 to 146 atm. Single or doublelaser pulses were used to ablate the target and the produced nanoparticles werecharacterized by atomic force microscopy (AFM) and by Raman spectroscopy. Aspectroscopic study of the laser induced plasma features was carried out with a Titarget and interpreted in terms of laser-induced cavitation phenomena. Tubularnanoparticles of 25 nm average diameter were obtained only by single pulse (SP)ablation of graphite, while particles formed with the double pulse (DP) techniquemainly consisted of graphite particulates. At 1 atm, these tubular nanoparticles were few and mixed with diamondlike carbon,while at 146 atm they were produced in a larger amount, suggesting that the high density effect induced by pressure plays a keyrole for their generation.

Autore Pugliese

• Taccogna Francesco , Senesi Giorgio Saverio , Dell'aglio Marcella , De Pascale Olga

Tutti gli autori

• A. De Giacomo; A. De Bonis; M. Dell’Aglio; O. De Pascale; R. Gaudiuso; S. Orlando; A. Santagata; G.S. Senesi; F. Taccogna; R. Teghil

Titolo volume/Rivista

Journal of physical chemistry. C

Anno di pubblicazione

2011

ISSN

1932-7447

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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