Abstract
The present research aims to investigate the modification and activation effects on medical-grade polydimethylsiloxane (PDMS) polymer irradiated by ultrashort laser pulses. The motivation of the current study is based on the wide use of the PDMS material in medicine and, more specifically, in implantable neural interface applications. Systematic measurements are carried out to characterize the effect of the laser beam parameters on the optical absorption and the surface morphology with respect to the laser-treated zones. The PDMS polymer is modified by surface tracks after the femtosecond laser processing. The optical properties of the PDMS are investigated to prove the effective laser activation of the surface, which ensures further successful metallization of the modified tracks. It is seen that defective transformations occur in the entire laser-treated area when the number of pulses is increased. The preliminary observation indicates promising results regarding the implementation of such a laser-based method for micro-or nano-processing of optically transparent biopolymers for interface devices in bioengineering technologies, such as neural implants and interface applications.
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