Laser Irradiation on the Chemical Composition of Metal Surfaces

INFLUENCE OF LASER IRRADIATION ON THE CHEMICAL COMPOSITION OF METAL SURFACES 

In the work by Fadeeva et al. (2011) and Fadeeva (2014), X-ray photoelectron spectrometry (XPS) analysis was performed to compare the chemical composition of a base metal (titanium) and noble metal (platinum) before and after laser structuring (Table 1).These XPS measurements were performed approximately 2 months after the laser structuring had taken place. The untreated, as well as laser structured samples, were stored under normal ambient conditions. 

The XPS analysis did not reveal any significant difference in the surface chemistry of untreated and structured samples. Therefore, both base and noble metals are characterized by a slight increase of oxygen after laser irradiation. This can be attributed to the increased oxidization of metals due to heating. It is also noticeable that both metals have a high amount of carbon in their surface composition. 

Element TI before Laser Structuring (At.%) Ti 60days after Laser Structuring (At. %) Pt before Laser Structuring (At.%) after Laser Structuring (At.%) 

Before Laser 5 h after Laser 52 days after Laser 

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