Customizable-width conducting polymer micro/nano-arrays by sub-picosecond laser interference patterning

L. MULKO; H. HEFFNER; S. BONGIOVANNI ABEL; R. BAUMANN; D. MARTIN; F. SCHELL; A. LASAGNI

ACS APPLIED POLYMER MATERIALS

ACS

Año: 2022 vol. 4 p. 8715 - 8721

Direct Laser Interference Patterning (DLIP) technique employing a sub-picosecond IR irradiationallows the ultra-fast processing of polyaniline surfaces polymerized onto a poly(methyl methacrylate) substrate (PANI@PMMA) achieving excellent quality features. The patterning shows high levels of precision regarding control of width and height in micro/nano-arrays, giving customization to the surfaces. The electroactive properties evaluation suggests the conductivity presents anisotropic characteristics following the patterning of the polymeric surfaces (RSL = 54 ± 5 kΩ sq-1 and RST = 1.7 ± 3 MΩ sq-1, longitudinal and transversal resistance mode respectively). The evidence is supported by Electrostatic Force Microscopy measurements. These results indicate potential applicability in the biomedical field of nerve and myocardial tissue regeneration.