Fabrication of hydrophobic structures on coronary stent surface based on direct three-beam laser interference lithography |
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| Authors: | GAO Long-yue ZHOU Wei-qi WANG Yuan-bo WANG Si-qi BAI Chong LI Shi-ming LIU Bin WANG Jun-nan CUI Cheng-kun LI Yong-liang |
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| Affiliation: | School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China;School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China;School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China;School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China;School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China;School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China;The Second Hospital of Jilin University, Changchun 130041, China;The Second Hospital of Jilin University, Changchun 130041, China;School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China;School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China |
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| Abstract: | To solve the problems with coronary stent implantation, coronary artery stent surface was directly modified by three-beam laser interference lithography through imitating the water-repellent surface of lotus leaf, and uniform micro-nano structures with the controllable period were fabricated. The morphological properties and contact angle (CA) of the microstructure were measured by scanning electron microscope (SEM) and CA system. The water repellency of stent was also evaluated by the contact and then separation between the water drop and the stent. The results show that the close-packed concave structure with the period of about 12 μm can be fabricated on the stent surface with special parameters (incident angle of 3°, laser energy density of 2.2 J·cm?2 and exposure time of 80 s) by using the three-beam laser at 1 064 nm, and the structure has good water repellency with CA of 120°. |
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