研究目的
To increase the hydrophilicity of a synthesized copolymer through femtosecond laser micromachining to control surface wettability.
研究成果
Femtosecond laser micromachining proved to be an effective method for increasing the hydrophilicity of the copolymer surface, with a decrease of 19.3 degrees in the water contact angle observed for the microstructured surface.
研究不足
The study focuses on a specific copolymer and may not be directly applicable to other materials without further research.
1：Experimental Design and Method Selection:
Femtosecond laser micromachining was used to create periodic surface patterns on the copolymer.
2：Sample Selection and Data Sources:
Films of the copolymer were cast from solutions in chloroform onto glass slides.
3：List of Experimental Equipment and Materials:
Femtosecond laser oscillator, microscope objective, translational stage, CCD camera, UV-Vis absorption spectrophotometer, optical microscopy, atomic force microscopy, goniometer.
4：Experimental Procedures and Operational Workflow:
The laser pulse energy and scanning speed were varied to determine optimal irradiation conditions for microfabrication.
5：Data Analysis Methods:
The microfabricated lines were analyzed by optical microscopy and atomic force microscopy to determine line widths and depths, respectively. Contact angle measurements were performed to verify hydrophilicity.
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UV-Vis absorption spectrophotometer
UV-1800
Shimadzu
Performing UV-Vis absorption spectroscopy
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Optical microscopy
LSM 700
Zeiss
Analyzing the fs-laser micromachined lines
ZEISS LSM 990 Spectral Multiplex
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Atomic force microscopy
easyScan2
Nanosurf
Determining the line depths
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Femtosecond laser oscillator
Femtosource XL
Delivering femtosecond pulses for micromachining
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Microscope objective
0.65NA
Focusing femtosecond laser pulses onto the surface sample
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Translational stage
x-y-z
Positioning the sample for microfabrication
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CCD camera
Monitoring the microfabrication process
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Goniometer
CAM 200
KSV
Performing contact angle measurements
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