中国激光, 2019, 46 (9): 0902001, 网络出版: 2019-09-10
飞秒激光加工水凝胶双面神微柱及其应用 下载: 1310次封面文章
Processing and Application of Hydrogel Janus Micropillars Based on Femtosecond Laser
激光技术 飞秒激光 pH响应 双面神微柱 信息加密和解密 laser technique femtosecond laser pH response Janus micropillars encryption and decryption of information
摘要
利用双面神结构实现形状转换是一种非常重要的方法。提出了一种通过控制飞秒激光扫描次数在pH敏感的水凝胶中制备形状可调的双面神微柱的方法,并探讨了该方法在信息加密、解密及显示方面的应用。结果表明:通过改变环境的pH值可使微柱表现出可逆的结构变形;激光打印技术的高灵活性使得微柱的空间布局、高度以及弯曲方向都能被灵活地控制,从而实现多种形状可转换的有序图案。
Abstract
Using Janus structures to realize shape transformation is an important method. Here, we present an approach which prepares geometry-switchable Janus micropillars by controlling scanning times of femtosecond laser on a pH-sensitive hydrogel. The applications of the proposed method in encryption, decryption, and display of information are explored. Results show that these micropillars exhibit reversible structural deformation when the pH of the aqueous environment is changed. Because the laser printing technique is highly flexible, the spatial arrangements, pillar heights, and bending directions of micropillars can be readily controlled. Thus, patterns with variable spatial arrangement can be realized.
孙锐, 王重宇, 胡衍雷, 辛晨, 吴东. 飞秒激光加工水凝胶双面神微柱及其应用[J]. 中国激光, 2019, 46(9): 0902001. Sun Rui, Wang Zhongyu, Hu Yanlei, Xin Chen, Wu dong. Processing and Application of Hydrogel Janus Micropillars Based on Femtosecond Laser[J]. Chinese Journal of Lasers, 2019, 46(9): 0902001.