Abstract In the present study, nanotribological measurements were performed via atomic force microscopy on Si/SiO2-supported graphene monolayers with varying oxide layer thicknesses. The observations uncovered significant discrepancies in resulting friction forces between each graphene sample. Nanoscale interfacial friction forces were observed to increase from ∼0.49 nN to ∼1.00 nN when the oxide layer thickness was increased from 90 nm to 300 nm. The findings were determined to be the result of increased phonon scattering which is responsible for the removal of the vibrational reduction of nanoscale friction. Such discrepancies in friction forces points toward the potential tunability of nanoscale friction in supported graphene.

中文翻译：

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石墨烯的基底调节纳米级摩擦

摘要在本研究中，纳米摩擦学测量是通过原子力显微镜对具有不同氧化层厚度的 Si/SiO2 支撑的石墨烯单层进行的。观察发现每个石墨烯样品之间产生的摩擦力存在显着差异。当氧化层厚度从 90 nm 增加到 300 nm 时，观察到纳米级界面摩擦力从 ~0.49 nN 增加到 ~1.00 nN。研究结果被确定为声子散射增加的结果，这是消除纳米级摩擦振动减少的原因。摩擦力的这种差异表明支撑石墨烯中纳米级摩擦的潜在可调性。