Fabrication and hydrophobic characteristics of micro / nanostructures on polydimethylsiloxane surface prepared by picosecond laser

Wang Bin; Shiyun Dong; Shixing Yan; Xiao Gang; Zhiwei Xie

doi:10.1117/12.2317668

5 March 2018 Fabrication and hydrophobic characteristics of micro / nanostructures on polydimethylsiloxane surface prepared by picosecond laser

Wang Bin, Shiyun Dong, Shixing Yan, Xiao Gang, Zhiwei Xie

Author Affiliations +

Proceedings Volume 10710, Young Scientists Forum 2017; 1071046 (2018) https://doi.org/10.1117/12.2317668
Event: Young Scientists Forum 2017, 2017, Shanghai, China

Abstract

Picosecond laser has ultrashort pulse width and ultrastrong peak power, which makes it widely used in the field of micro-nanoscale fabrication. polydimethylsiloxane (PDMS) is a typical silicone elastomer with good hydrophobicity. In order to further improve the hydrophobicity of PDMS, the picosecond laser was used to fabricate a grid-like microstructure on the surface of PDMS, and the relationship between hydrophobicity of PDMS with surface microstructure and laser processing parameters, such as processing times and cell spacing was studied. The results show that: compared with the unprocessed PDMS, the presence of surface microstructure significantly improved the hydrophobicity of PDMS. When the number of processing is constant, the hydrophobicity of PDMS decreases with the increase of cell spacing. However, when the cell spacing is fixed, the hydrophobicity of PDMS first increases and then decreases with the increase of processing times. In particular, when the times of laser processing is 6 and the cell spacing is 50μm, the contact angle of PDMS increased from 113° to 154°, which reached the level of superhydrophobic.

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Wang Bin, Shiyun Dong, Shixing Yan, Xiao Gang, and Zhiwei Xie "Fabrication and hydrophobic characteristics of micro / nanostructures on polydimethylsiloxane surface prepared by picosecond laser", Proc. SPIE 10710, Young Scientists Forum 2017, 1071046 (5 March 2018); https://doi.org/10.1117/12.2317668

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KEYWORDS

Laser processing

Picosecond phenomena

Nanolithography

Nanostructures

Surface roughness

Solids

Laser crystals

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