Femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces
This study investigated the use of ultrashort femtosecond laser pulses to induce either hydrophilic or hydrophobic surfaces on polycarbonate (PC). It has been observed that controlled modification of wettability could be achieved over a wide range of the water contact angle from below 5° to above 15...
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sg-ntu-dr.10356-903252023-03-04T17:17:41Z Femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces Wang, Z. K. Zheng, H. Y. Thwe, A. M. Chen, Guojie Lam, Y. C. School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Femtosecond Laser Irradiation Polymer Surface Wettability This study investigated the use of ultrashort femtosecond laser pulses to induce either hydrophilic or hydrophobic surfaces on polycarbonate (PC). It has been observed that controlled modification of wettability could be achieved over a wide range of the water contact angle from below 5° to above 150°. It has been shown that the pulse energy fluence and total energy deposition onto PC are the important factors in determining the laser–PC interaction and therefore the different level of wettability on PC surface. X-ray photoelectron spectroscopy-spectra measurement indicates that the modification was caused dominantly by laser induced chemical bond changes. The changes in surface morphology may not noticeably contribute to the surface wettability. The results would be useful in microfluidics chip design and fabrication with controlled surface wetting properties. ASTAR (Agency for Sci., Tech. and Research, S’pore) Published version 2019-07-18T08:33:42Z 2019-12-06T17:45:46Z 2019-07-18T08:33:42Z 2019-12-06T17:45:46Z 2019 Journal Article Wang, Z. K., Zheng, H. Y., Thwe, A. M., Chen, G., & Lam, Y. C. (2019). Femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces. Journal of Laser Applications, 31(2), 022504-. doi:10.2351/1.5096074 1042-346X https://hdl.handle.net/10356/90325 http://hdl.handle.net/10220/49433 10.2351/1.5096074 en Journal of Laser Applications © 2019 Laser Institute of America. All rights reserved. This paper was published by AIP Publishing in Journal of Laser Applications and is made available with permission of Laser Institute of America. 9 p. application/pdf |
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Engineering::Mechanical engineering Femtosecond Laser Irradiation Polymer Surface Wettability Wang, Z. K. Zheng, H. Y. Thwe, A. M. Chen, Guojie Lam, Y. C. Femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces |
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This study investigated the use of ultrashort femtosecond laser pulses to induce either hydrophilic or hydrophobic surfaces on polycarbonate (PC). It has been observed that controlled modification of wettability could be achieved over a wide range of the water contact angle from below 5° to above 150°. It has been shown that the pulse energy fluence and total energy deposition onto PC are the important factors in determining the laser–PC interaction and therefore the different level of wettability on PC surface. X-ray photoelectron spectroscopy-spectra measurement indicates that the modification was caused dominantly by laser induced chemical bond changes. The changes in surface morphology may not noticeably contribute to the surface wettability. The results would be useful in microfluidics chip design and fabrication with controlled surface wetting properties. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Wang, Z. K. Zheng, H. Y. Thwe, A. M. Chen, Guojie Lam, Y. C. |
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Article |
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Wang, Z. K. Zheng, H. Y. Thwe, A. M. Chen, Guojie Lam, Y. C. |
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Wang, Z. K. |
title |
Femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces |
title_short |
Femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces |
title_full |
Femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces |
title_fullStr |
Femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces |
title_full_unstemmed |
Femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces |
title_sort |
femtosecond laser pulse inducing hydrophilicty and hydrophobicity on polycarbonate surfaces |
publishDate |
2019 |
url |
https://hdl.handle.net/10356/90325 http://hdl.handle.net/10220/49433 |
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1759853410436251648 |