Chinese Optics Letters, 2015, 13 (3): 031404, Published Online: Sep. 25, 2018
Anisotropic dewetting polydimethylsiloxane surface fabricated using ultrashort laser pulses Download: 1034次
140.3390 Laser materials processing 140.3538 Lasers, pulsed 160.1435 Biomaterials 160.4236 Nanomaterials
Abstract
Anisotropic dewetting polydimethylsiloxane (PDMS) surfaces, which consist of groove-like micro/nanostructures (so-called hierarchical structures), are fabricated using an ultrashort pulsed laser. The contact angles (CAs) are measured parallel to the microgrooves, which are always larger than those measured perpendicular to the microgrooves, exhibiting a superhydrophobic anisotropy of approximately 4° on these fabricated PDMS surfaces at optimized parameters. These pulsed-laser irradiated surfaces exhibit enhanced hydrophobicity with CAs that increase from 116° to 156° while preserving the anisotropic dewetting. Additionally, the wettability of the surfaces with different morphologies is investigated. The temporal evolution of the wettability of the pulsed-laser irradiated PDMS surface is also observed within the first few hours after pulsed laser irradiation.
Huaihai Pan, Fangfang Luo, Geng Lin, Quanzhong Zhao. Anisotropic dewetting polydimethylsiloxane surface fabricated using ultrashort laser pulses[J]. Chinese Optics Letters, 2015, 13(3): 031404.