Journal
APPLIED SURFACE SCIENCE
Volume 255, Issue 24, Pages 9745-9749Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2009.04.063
Keywords
Phase-transitions; Laser nano-fabrication; Shock waves; Sapphire; Synchrotron X-rays
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We report on structural characterization of void-structures created by a micro-explosion at the locus of a tightly focused femtosecond laser pulse inside the crystalline phase of Al2O3 (R3c space group). The transmission electron microscopy (TEM), micro-X-ray diffraction (XRD) analysis, and Raman scattering revealed a presence of strongly structurally modified amorphous regions around the void-structures. We discuss issues of achieving the required resolution for structural characterization and assignment of newly formed phases of nano-crystallites by TEM, XRD, and Raman scattering from micro-volumes of modified materials enclosed inside the bulk of the host phase. (C) 2009 Elsevier B.V. All rights reserved.
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