Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta", Politecnico di Milano, Istituto di Fotonica e Nanotecnologie (IFN)-CNR, Milan, Italy.
ACS Appl Mater Interfaces. 2010 Aug;2(8):2377-84. doi: 10.1021/am100393e.
The effects of femtosecond laser ablation on the physical and chemical properties at the surface of poly methylmethacrylate (PMMA) were studied. Femtosecond laser microfabrication caused the initially wetting behavior of PMMA to become nonwetting, mainly because of the laser-induced surface porosity at the submicroscale. Static and dynamic contact angle measurements along with morphological characterization revealed that after the laser irradiation, the system lies in an intermediate regime between those theorized by Wenzel and Cassie-Baxter. Spectroscopic analysis did not evidence any significant variation in the chemical properties of the processed polymeric surfaces.
研究了飞秒激光烧蚀对聚甲基丙烯酸甲酯（PMMA）表面物理化学性质的影响。飞秒激光微加工导致 PMMA 的初始润湿行为变为不润湿，主要是因为亚微米级的激光诱导表面多孔性。静态和动态接触角测量以及形貌表征表明，激光照射后，该体系处于 Wenzel 和 Cassie-Baxter 理论所预测的中间状态。光谱分析没有表明处理后的聚合物表面的化学性质有任何显著变化。
