Fabrication of multiscale structures on polymethylmethacrylate following pulsed CO2 laser irradiation

Hedieh Pazokian; Mitra Vesal; Sahar Sohrabi; Mahmoud Mollabashi

doi:10.1117/1.OE.57.12.125103

10 December 2018 Fabrication of multiscale structures on polymethylmethacrylate following pulsed CO2 laser irradiation

Hedieh Pazokian, Mitra Vesal, Sahar Sohrabi, Mahmoud Mollabashi

Author Affiliations +

Optical Engineering, Vol. 57, Issue 12, 125103 (December 2018). https://doi.org/10.1117/1.OE.57.12.125103

Abstract

Different micro- and nanostructures are formed on the surface of the polymers following laser irradiation. The formation of these structures, which is dependent on the irradiation parameters and the material properties, affects the functionality and the efficiency of the polymers for a desired application. We investigate nano- and microstructure formation on the surface of polymethylmethacrylate polymer following pulsed CO₂ laser irradiation at the wavelength of 9.55 μm in vacuum. Three different multiscale structures including nano- and microspheres, microholes, and ripples are formed on the surface after irradiation at various fluences below and above the ablation threshold. The possible mechanisms for the formation of these structures are explained. Melting, thermal waves, and internal stresses supposed to be the most important phenomena affect the shape and the size of the structures. The effect of irradiation on the UV–Vis spectra of the samples is also investigated.

Citation Download Citation

Hedieh Pazokian, Mitra Vesal, Sahar Sohrabi, and Mahmoud Mollabashi "Fabrication of multiscale structures on polymethylmethacrylate following pulsed CO2 laser irradiation," Optical Engineering 57(12), 125103 (10 December 2018). https://doi.org/10.1117/1.OE.57.12.125103

Received: 17 July 2018; Accepted: 14 November 2018; Published: 10 December 2018

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