Multi-oxidized thin films were fabricated by applying laser color marking technique on a stainless steel surface with laser irradiation using an YVO4 pulsed-laser at 30 kHz in atmospheric conditions. These multi-oxidized thin films emitted several colors including purple, violet, ultramarine, orange, and green. Using this technique, these mono-colors were produced on the surface according to the scanning repetition number and laser power. Results of XRD analyses for the colored areas showed several types of oxides consisting of FeO, Fe3O4, CrO, Cr2O3, Cr3O4, NiO, Ni2O3, NiCr2O4, and their mixed oxides, which consisted of oxygen vacancy structures. Each of these oxides has its original color for each composition and structure if the mono-phase area producing it shows clear mono-color corresponding to the composition and structure.

Topics
Crystallographic defects, Lasers, Oxides, Transition metals, Thin films
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2007
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