This study addresses the synthesis and mechanical behavior of graphene-metal composites comprising palladium (Pd) nanoribbons wrapped with graphene. Coating Pd nanoribbons with graphene by chemical vapor deposition (CVD) considerably increases their elastic modulus. These measurements are made by suspended microbridge indentation. A refined indentation measurement approach carefully takes into consideration the uncertainty resulting from the non-ideal bridge geometry. The measured composite moduli depend on the ribbon thickness in the range of 36–250 nm, with the maximum modulus of 147 GPa measured for 36 nm thick nanoribbons, representing an increase of 41.6% over uncoated Pd nanoribbons. The results clearly demonstrate that graphene, owing to its high modulus and strong interaction with Pd, can effectively reinforce Pd nanoribbons up to thickness of 250 nm, which corresponds to a volume fraction of 0.54%. We study the modulus scaling by deriving a mathematical rule of mixture ...

中文翻译：

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石墨烯-金属复合纳米带的弹性模量缩放

这项研究解决了石墨烯-金属复合材料的合成和力学行为，该复合材料包括包裹有石墨烯的钯（Pd）纳米带。通过化学气相沉积（CVD）用石墨烯涂覆Pd纳米带可以大大提高其弹性模量。这些测量是通过悬浮微桥压痕进行的。精细的压痕测量方法会仔细考虑非理想桥几何结构带来的不确定性。测得的复合模量取决于带厚度在36–250 nm之间，对于36 nm厚的纳米带，测得的最大模量为147 GPa，比未涂覆的Pd纳米带增加了41.6％。结果清楚地表明，石墨烯由于其高模量和与Pd的强相互作用，可以有效地增强Pd纳米带的厚度，最大厚度为250 nm，相当于0.54％的体积分数。我们通过推导混合的数学规则来研究模量缩放...