Micropatterned film with nano-porous sodium titanate structure fabricated via template-free direct laser irradiation technology: Characteristics and set-selective apatite deposition ability

Micropatterned films with nano-porous sodium titanate on titanium were prepared by a template-free laser irradiation technology. The microstructure and composition of the micropatterns on titanium were investigated by scanning electron microscope, energy dispersive spectrum and Raman spectrum. The results showed that: (1) Micropatterned films with nano-porous structure could be prepared using laser irradiation with various powers. A well-defined morphology was shown at the irradiation power of 5W. Nanobumps were observed to homogeneously distribute in the laser irradiation zone. (2) Set-selective apatite deposition was identified on the micropatterned films in simulated body fluid. The laser irradiation technology is capable of controlling the micro- and nano-scale geometry of the film on titanium surface, and the micropatterned film would be potentially used for manipulating stem cell adhesion and differentiation. •Micropatterned film was fabricated via direct laser irradiation.•No template was used in this micropatterning process.•Set-selective apatite deposition ability of the micropatterned film was determined.•The nanostructures of the two parts of micropatterned film were examined.