One-step formation of multifunctional nano-and microscale structures on metal surface by femtosecond laser

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2015,（6）
• 页码范围: 48-51
• 页数: 4页
• 语种: 中文
• DOI: 10.3788/COL201513.061402

摘要

Metals in nature exhibit a mediocre wettability and a high optical reflectance from the visible region to the infrared.This Letter reports that,by formation of nano-and microscale structures via a simple raster scanning of a focused femtosecond laser pulse without any further treatment,structured aluminum and nickel surfaces exhibit combined features of superhydrophobicity with a contact angle of 155.5°,and a high optical absorption with a reflectivity of several percent over a broad spectral range (0.2-2.5 μm).Thus,a multifunctional structured metal surface that integrates superhydrophobicity and a high broadband absorptivity has been easily realized by one-step femtosecond laser processing.