Scanning electron micrographs of titanium metal surface before (untreated) and after laser irradiation in the ambient gases shown, with a total pressure of 100 Torr in each case. The air mixture consists of a 1:4 ratio of O2:N2.
(a) XPS of untreated titanium and laser-structured samples. The samples were Ar+ sputtered for 10 min immediately before measurement. (b) High resolution XPS of the Ti (2p) region of untreated and laser-structured titanium. The samples were Ar+ sputtered for 20 min before measurements.
XRD of the untreated titanium and laser-structured samples. The films display only the (002) and (103) peaks expected for evaporated titanium.
Raman spectra of the untreated titanium and laser-structured samples, collected from an excitation wavelength of 633 nm.
(a) Open circuit measurements before and after laser irradiation collected at room temperature in a solution to simulate biocompatibility, measured vs. NHE. (b) Current density changes of untreated and laser-structured samples at 494 mV (vs. NHE).
Reflectivity of samples measured with a spectrophotometer with an integrating sphere.
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