皮秒激光加工制备钛酸锶单晶超亲水表面  

Fabrication of super-hydrophilic surface of strontium titanate single crystal by using picosecond laser processing

作　　者：丁杰[1] 赵艳[1] 蒋毅坚[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100124

出　　处：《光电子．激光》2014年第9期1736-1741,共6页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(51005005);北京市自然科学基金重点项目(B类);北京市教育委员会科技计划(JC101311201201)资助项目

摘　　要：报道了一种通过皮秒激光加工快速制备钛酸锶(SrTiO3)单晶超亲水表面的方法。室温下,采用皮秒激光加工系统,在SrTiO3单晶表面刻蚀出整齐的周期性线排列沟槽结构,使SrTiO3单晶表面浸润性向亲水方向转变。研究了不同划线间隔对表面接触角大小的影响。结果表明:接触角的大小随划线间隔的变化而变化,间隔越大,接触角越大;当沟槽间隔小于150μm时,得到超亲水表面。其机理是:根据Wenzel模型,增大表面粗糙度可以使表面浸润性向亲水方向转变;并且沟槽结构产生了虹吸现象,也增强了亲水性。This paper reports a quick preparing super-hydrophilic strontium titanate surface method by pi- cosecond laser processing. At room temperature, by picosecond laser processing systems, the single crystal of strontium titanate surface was etched to be the surface with neatly arranged periodic trench structure,and as a result, the invasive of the surface turns to be more hydrophilic. The effect of groove spacing on the size of the surface contact angle is studied. Results show that the size of the contact angle changes with groove spacing,namely, the groove spacing is greater, the contact angle is larger. When the groove spacing is less than 150μm, the surface becomes super hydrophilic surfaces. Its mechanism is that according to the Wenzel model,increasing the surface roughness can make the invasive of the surface be more hydrophilic. The groove structure produced siphon phenomenon also enhances the hydrophilicity.

关 键 词：钛酸锶(SrTiO3)单晶 皮秒激光加工 超亲水 

分 类 号：O484[理学—固体物理]