Self-Organized Micro-Columns and Nano-Spheres Generated by Pulsed Laser Ablation of Ti/Al Alloy in Water
CUI Qing-Qiang1, LIU Xiang-Dong1**, CHEN Ming1**, ZHAO Ming-Wen1, WANG Chun-Sheng2, LI Shuang1,3
1School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 2School of Chemistry, Shandong University, Jinan 250100 3School of Computer, Shandong Xiehe University, Jinan 250100
Abstract:Dense arrays of micro-columns are formed on the surface of Ti-Al alloy by cumulative nanosecond pulsed laser ablation in water. The fabric-like structure characterized by Ti-Al nano-spheres absorbed on micro-cluster in liquid is most likely responsible for the occurrence of laser micro-etching and localized melting, resulting in continuous deepening of micro-holes and the formation of micro-columns. Laser induced plasma spectroscopy is carried out to reveal the effect of micro-columns on subsequent pulse laser ablation. The intensity of spectral lines from Ti ions by additional laser ablation of the modified spot is higher than that created over a smooth surface. These results suggest that the micro-columns lead to an enhanced absorption of the following laser energy. The proposed results and relevant discussions are of importance for the development of light-trapping coatings on a metal surface.
. [J]. 中国物理快报, 2014, 31(1): 15202-015202.
CUI Qing-Qiang, LIU Xiang-Dong, CHEN Ming, ZHAO Ming-Wen, WANG Chun-Sheng, LI Shuang. Self-Organized Micro-Columns and Nano-Spheres Generated by Pulsed Laser Ablation of Ti/Al Alloy in Water. Chin. Phys. Lett., 2014, 31(1): 15202-015202.