Optoelectronics Letters, Volume. 12, Issue 3, 233(2016)
Fabrication of hydrophobic structures on coronary stent surface based on direct three-beam laser interference lithography
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-2and 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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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. Fabrication of hydrophobic structures on coronary stent surface based on direct three-beam laser interference lithography[J]. Optoelectronics Letters, 2016, 12(3): 233
Received: Nov. 4, 2015
Accepted: --
Published Online: Oct. 12, 2017
The Author Email: Yong-liang LI (liyongliang@cust.edu.cn)