Direct fabrication of surface architectures on polymers and copolymers using laser interference patterning

Surface pattering engineering techniques are essential to fabricate advanced topogs. that can be use to modulate cell and tissue response in bio-materials. Particularly, direct laser interference patterning permits fabrication of repetitive arrays and microstructures by irradn. of the sample surface with coherent beams of light. In this study, we explore the possibilities of this technique to produce advanced architectures on several polymeric substrates. The previously calcd. interference patterns using the well known interference theory could be directly reproduced on the polymeric surfaces. Moreover, the cross-section of the structured polymers changes depending on the intensity of the laser beams and no. of laser pulses, and photomachinability of polymers is highly influenced by laser wavelength. High absorbance of the polymeric materials at specific wavelengths allows the redn. of the laser intensity required to achieve a detd. structure depth. In addn., copolymers of