Wavelength-dependent fragmentation and clustering observed after femtosecond laser ablation of solid C{sub 60}

Journal Article · Fri Sep 21 04:00:00 EDT 2007 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.2772243· OSTI ID:21024183

Kobayashi, T; Kato, T; Matsuo, Y; Kurata-Nishimura, M; Hayashizaki, Y; Kawai, J ^[1]

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1. RIKEN Discovery Research Institute, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)

We report here the resonance effect in femtosecond laser ablation of solid C{sub 60} by investigating wavelength and fluence dependence of product ion species. When the ablation laser wavelength is far from the molecular absorption band of C{sub 60}, we observe both C{sub 60-2n}{sup +} fragment ions and C{sub 60+2n}{sup +} cluster ions as well as C{sub 60}{sup +} parent ion. Delayed ionization of C{sub 60} is not significant. When the ablation laser wavelength is near resonant with the molecular absorption, we observe C{sub 60}{sup +} and some amount of C{sub 60-2n}{sup +} fragment ions depending on the laser fluence. Delayed ionization of C{sub 60} is significant in this case, which indicates high internal energy of C{sub 60} molecule. From the observations, we confirm the strong coupling of femtosecond laser energy with C{sub 60} molecule when the molecular absorption is high at the ablation laser wavelength.

• OSTI ID: 21024183
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 11 Vol. 127; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
ABLATION
ABSORPTION
FRAGMENTATION
FULLERENES
ION PAIRS
LASERS
PHOTOIONIZATION
STRONG-COUPLING MODEL
SURFACE IONIZATION