Carbon-Based Nanostructures Obtained in Water by Ultrashort Laser Pulses
| Autor: | Marcella Dell’Aglio, G.P. Parisi, R. Gaudiuso, Stefano Orlando, Antonio Santagata, Alessandro Laurita, Giorgio S. Senesi, A. De Giacomo, Roberto Teghil, A. De Bonis |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Scanning electron microscope business.industry Ti:sapphire laser chemistry.chemical_element Diamond Surface-enhanced Raman spectroscopy engineering.material Surfaces Coatings and Films Electronic Optical and Magnetic Materials X-ray laser ENHANCED RAMAN-SCATTERING CHEMICAL-VAPOR-DEPOSITION SOLID INTERFACIAL REACTION DIAMOND NANOCRYSTALS NANODIAMOND PARTICLES AMORPHOUS-CARBON ABLATION LIQUID NANOPARTICLES OXYGEN General Energy chemistry Sapphire engineering Optoelectronics Graphite Physical and Theoretical Chemistry business Carbon |
| Zdroj: | Journal of physical chemistry. C 115 (2011): 5160–5164. doi:10.1021/jp1094239 info:cnr-pdr/source/autori:A. Santagata, A. De Bonis, A. De Giacomo, M. Dell'Aglio, A. Laurita, G.S. Senesi, R. Gaudiuso, S. Orlando, R. Teghil and G.P Parisi/titolo:Carbon-based nanostructures obtained in water by ultrashort laser pulses/doi:10.1021%2Fjp1094239/rivista:Journal of physical chemistry. C/anno:2011/pagina_da:5160/pagina_a:5164/intervallo_pagine:5160–5164/volume:115 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp1094239 |
| Popis: | An ultrashort (100 fs) Ti:Sapphire pulsed laser has been employed in order to produce nanostructures by pulsed ablation of a graphite target in water. Different (10-100- 1000 Hz) repetition rates have been used, and the features of material produced have been investigated by surface enhanced Raman spectroscopy (SERS) and scanning electron micro- scopy (SEM). SERS spectra show that a broad asymmetric band associated with diamond-like carbon (DLC) is observed when repetition rates of 10 or 100 Hz are used. On the contrary, ablated species produced with 1 kHz pulses present a narrow peak at 1333 cm -1 , the typical mode of diamond, which is, however, embedded in a DLC band centered at 1540 cm -1 . SEM images show the presence of dispersed octahedral-shaped structures having a size from 1 to 5 ?m, in the case of 10 or 100 Hz repetition rates, and agglomerates of particles having a dimension below 300 nm, when 1 kHz pulses are used. |
| Databáze: | OpenAIRE |
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