Amorphous nanostructuralization in HOPG by 10(14) W cm(-2) laser
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Authors
Nishimura, Yasuhiko
Kitagawa, Yoneyoshi
Mori, Yoshitaka
Ishii, Katsuhiro
Hanayama, Ryohei
Azuma, Hirozumi
Hioki, Tatsumi
Nishi, Teppei
Motohiro, Tomoyoshi
Komeda, Osamu
Issue Date
2016
Type
Article
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Abstract
This reports provide an amorphous nanostructuralization technique on the surface modification in Highly Oriented Pyrolytic Graphite (HOPG) by using a femtosecond laser. We showed, for the first time, that the surface of HOPG is changed to the amorphous nanostructuralization graphite by using a femtosecond laser-driven compression technique. Our results also suggest that the HOPG surface is changed until the deeper area from the surface by the laser-driven shock wave. A single shot of a femtosecond laser beam (1.27,similar to,1.33x10(14) W cm(-2) in intensity, with 2mm-diameter, and 110 fs in pulse width) is irradiated under the vacuum ambience onto a 2mm-thick of HOPG. The calculated impact pressures on a sample was 8.3 similar to 8.7 GPa. Crystal structure in the HOPG were analyzed using a Raman spectroscopy and an X-ray diffraction, those analyzing depth from the surface were 50 nm and 350pm, respectively.
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Citation
Yasuhiko NISHIMURA et al 2016 J. Phys.: Conf. Ser. 717 012073
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ISSN
1742-6588