研究目的
To optimize CO2 laser power levels for effective patterning of single-layer graphene film on transparent substrates and examine the effect of different laser power levels on the electrical property of graphene TCFs before and after patterning.
研究成果
The study successfully optimized CO2 laser power levels for patterning single-layer graphene films on transparent substrates. The patterned films were free from defects such as film narrowing and wrapping, and the sheet resistance remained unchanged after patterning. The optimized laser power conditions provide a fast and efficient method for patterning graphene films for advanced device applications.
研究不足
The study focused on optimizing CO2 laser power for patterning single-layer graphene films and did not explore the patterning of multi-layer graphene or other graphene-based composites. The effect of laser patterning on other properties of graphene, such as thermal conductivity, was not examined.
1：Experimental Design and Method Selection:
The study involved optimizing CO2 laser power levels for patterning single-layer graphene films on transparent substrates. The effect of laser power on the electrical properties of graphene was examined.
2：Sample Selection and Data Sources:
Single-layer graphene films were synthesized using thermal chemical vapor deposition (T-CVD) on copper foil and transferred to microscopic glass slides and PET substrates.
3：List of Experimental Equipment and Materials:
CO2 laser engraver and cutting system (Universal Laser Systems, M-360/V-460), FESEM (Zeiss Supra55 VP), Raman spectrometer (Horiba Jobin Yvon HR800), UV-Vis spectroscopy system (Cary 100), optical microscope (Zeiss Axio), four-point probe system (Lucas Lab 302 with 2400 DC source-meter).
4：Experimental Procedures and Operational Workflow:
Graphene was synthesized on Cu foil using T-CVD, transferred to substrates, and patterned using CO2 laser at varying power levels. The samples were then characterized for morphology, structure, and electrical properties.
5：Data Analysis Methods:
The quality of graphene was analyzed using Raman spectra, optical properties were measured using UV-Vis spectroscopy, and electrical properties were assessed using a four-point probe system.
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