Experimental study on interfacial mechanical behavior of MoS2/graphene heterostructure on soft substrate under biaxial strain using micro-Raman spectroscopy

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2025-04-25 DOI:10.1016/j.carbon.2025.120354

Jibin Liu , Huadan Xing , Xiaojie Wang , Zhixuan Cheng , Yuxuan Huang , Chaochen Xu , Wei Qiu

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Abstract

The mechanical behaviors at the interfaces between two-dimensional materials and flexible substrates persists as a prominent research focus in various fields. In this work, the MoS₂/graphene heterostructures were assembled on the cross-shaped PDMS substrates. A series of Raman and photoluminescence experiments were performed under step-by-step loading with distinct strain states. According to the experimental results, an improved strain transfer model of finitely elastic interface (iFEI-ST) was proposed, which suggests that the strain transfer efficiencies between the substrate and the two-dimensional material under tensile strain should be different with that under compressive strain. The transfer efficiencies of the structure were quantified under various strain states. Furthermore, the nonlinear behaviors of interfacial debonding and wrinkles were also observed and discussed based on the iFEI-ST model, which further illustrates the importance of utilizing the proposed model to explore the strain transfer efficiency of any complex strain state.

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双轴应变下MoS2/石墨烯异质结构在软基上界面力学行为的微拉曼光谱实验研究

二维材料与柔性基板界面处的力学行为一直是各个领域的研究热点。在这项工作中，MoS2/石墨烯异质结构被组装在十字形PDMS衬底上。在不同的应变状态下进行了一系列的拉曼和光致发光实验。根据实验结果，提出了一种改进的有限弹性界面应变传递模型（iFEI-ST），该模型表明，拉伸应变作用下基体与二维材料之间的应变传递效率与压缩应变作用下的应变传递效率不同。在不同应变状态下，量化了该结构的传递效率。此外，基于iFEI-ST模型还观察和讨论了界面脱粘和起皱的非线性行为，进一步说明了利用该模型探索任何复杂应变状态下的应变传递效率的重要性。

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.