研究目的
To study the mechanical performance and the effect of the stacking mode of the double-layer graphene interface.
研究成果
The interfacial mechanical properties of double-layer graphene were determined, with the interlayer shear stress of graphene found to be 0.084 MPa. Different stacking modes lead to stress concentration at the boundary of the short layers of graphene, which should be considered for practical applications in micro-electrical components.
研究不足
The study focuses on the mechanical properties and stress concentration caused by different stacking modes of double-layer graphene, but does not explore the electrical properties or other potential applications in depth.
1：Experimental Design and Method Selection:
Three kinds of double-layer graphene-PET composite structure specimens with different stacking methods were designed. By combining micro-Raman spectroscopy with a micro-tensile loading device, in-situ and real-time measurements were carried out for the specimens during the uniaxial loading process.
2：Sample Selection and Data Sources:
The specimens were uniaxially tensioned by a micro-loading device, and the substrate was stretched from 0% to
3：8%. List of Experimental Equipment and Materials:
A Renishaw InVia confocal micro-Raman system with a 50× objective lens and 633-nm He-Ne laser as the excitation source was used.
4：Experimental Procedures and Operational Workflow:
The whole loading stage was in the elastic stage of PET to ensure the accuracy of the measurement results.
5：Data Analysis Methods:
Based on mechanical analysis, a method for peak splitting of the Raman spectra of double-layer polycrystalline graphene was developed to extract the strain information of each layer of graphene.
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