Analysis of chemical property for Cu–Cr complex surface by laser irradiation with different wavelength and laser mode

Modification of the metal complexes by the laser irradiation with different wavelength and beam quality is investigated. After irradiation, the structure of macromolecular metal complexes are changed, and the reducing metal crystal nucleus emerges.. In this paper, the surface of the metal complexes is irradiated by laser scanning with wavelengths of 532 nm, 1064 nm and 10.6 μm.The 1064nm laser performs the most favorably by using Scanning Electron Microscope and X-ray Photoelectron Spectroscopy. Because the change of chemical composition percentage and variation of metal chemical valence state is most evident. Furthermore, mode selection of laser cavity by adding a pinhole aperture further improves the surface topography, fineness of modification and reducing ability. The appropriate wavelength and mode selection should be utilized together with other influencing laser parameters to achieve the most favorable consequence of metal complexes surface modification.

► We compare laser irradiation of three wavelengths and different laser mode on metal complex.
► The surface chemical change and reducing ability is proved by analysis of XPS and AES.
► We exam that 1064 nm laser to the most extent changes the surface reducing property.
► Laser mode selection enhances the surface reducing ability after irradiation.