چكيده به لاتين
Microfluidics chips have gained important applications in many areas of the research, such as chemical synthesis, biotechnology and optofluidic technology because of their advantages like high sensitivity, speed of analysis, low sample and reagent consumption, and measurement automation and standardization. Among the various polymeric materials used for fabrication of the microfluidic devices, Polymethylmethacrylate (PMMA) is mostly used because of its low cost, transparency and biocompatibility which is important, especially for the biological applications. On the other hand, laser micromachining is one of the most important manufacturing methods used for fabrication of the microchannels.
Following laser micromachining different micro and nano structures arrays may appear on the bottom of the microchannel depended on the irradiation parameters. Formation these structures affect the total throughput of the microchannels.
In this thesis, the formation of the micro and nanostructure on the surface of PMMA polymer following pulsed CO2 laser irradiation was studied. Scanning electron microscopy (SEM) was used for the investigation surface morphology before and after irradiation. Different microstructures including wavelike and bubble like structures with nano and micrometer dimensions was observed on the sample after irradiation. The formation of these structure was explained according to the irradiation conditions.
