研究目的
Investigating the fabrication of sequential colors on copper by adjusting femtosecond laser defocusing distance and exploring the mechanisms behind the induced colors and their hydrophobicity.
研究成果
The study successfully demonstrates a method for fabricating sequential colors on copper by adjusting femtosecond laser defocusing distance. The color evolution is linked to different surface structures, and the surfaces exhibit hydrophobicity, which could have practical applications.
研究不足
The study is limited to copper surfaces and specific laser parameters. The mechanisms of color evolution and hydrophobicity may vary with different materials or laser settings.
1：Experimental Design and Method Selection:
The study uses a femtosecond laser to irradiate copper surfaces with varying defocusing distances to induce sequential colors.
2：Sample Selection and Data Sources:
Commercially available pure copper plates were used.
3：List of Experimental Equipment and Materials:
A femtosecond laser (Pharos from Light Conversion), scanning electron microscope (SEM), laser scanning confocal microscope (LSCM), spectrophotometer, and optical contact angle meter were used.
4：Experimental Procedures and Operational Workflow:
The laser defocusing distance was varied, and the resulting colors and surface structures were analyzed.
5：Data Analysis Methods:
SEM images, reflective spectra, and contact angle measurements were analyzed to understand the color evolution and hydrophobicity.
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