| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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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
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| Cite this article: |
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CUI Qing-Qiang, LIU Xiang-Dong, CHEN Ming et al 2014 Chin. Phys. Lett. 31 015202 |
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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.
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Received: 05 August 2013
Published: 28 January 2014
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| PACS: |
52.38.Mf
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(Laser ablation)
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52.70.Kz
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(Optical (ultraviolet, visible, infrared) measurements)
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52.38.Ph
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(X-ray, γ-ray, and particle generation)
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