在剥落的单层石墨烯上进行摩擦异性驱动域成像
Jin Sik Choi1, Jin-Soo Kim, Ik-Su Byun
1Division of Quantum Phases and Devices, Department of Physics, Konkuk University, Seoul 143-701, Korea.
Science (New York, N.Y.)
|July 2, 2011
概括
使用摩擦力显微镜在剥落的石墨烯上发现了具有不同摩擦力的域. 这些由波纹和结引起的域表现出异性摩擦,随着施加的负载而变化.
科学领域:
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
- 纳米技术纳米技术
背景情况:
- 与理论预测相比,脱皮石墨烯经常表现出性能问题.
- 结构和电子缺陷被怀疑是导致石墨烯性能降低的原因.
研究的目的:
- 为了调查脱皮单层石墨烯性能变化的原因.
- 描述在石墨烯表面上的摩擦域及其特性.
主要方法:
- 使用摩擦力显微镜 (FFM) 来测量摩擦特性.
- 进行了取决于角度的扫描来分析摩擦异构性.
- 应用了不同的负载来观察摩擦行为的变化.
主要成果:
- 在脱皮单层石墨烯上观察到不同的域,具有不同的摩擦性能.
- 在每个领域内发现了180°周期摩擦异质性.
- 发现摩擦异构性随着施加负载的增加而减少.
结论:
- 建议石墨烯的波纹扭曲导致观察到的摩擦域.
- 假设这些波纹中的异构波动会引起异构摩擦.
- 这表明波纹诱导的域是脱皮石墨烯可变性能的关键因素.
相关概念视频
01:08Atomic Force Microscopy
Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
01:07Frictional Force
When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...