在石墨烯充烯三明治中,光束驱动动力学的温度依赖性
Kevin R Strobel1, Michael Schlegel1, Mitisha Jain2
1University of Tübingen, Institute of Applied Physics, Auf der Morgenstelle 10, Tübingen 72076, Germany; NMI Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstrasse 55, Reutlingen 72770, Germany.
概括
石墨烯板内C60富勒烯的光束诱导聚合显示了温度依赖的结构变化. 较低的温度有利于管状集群,而较高的温度则有利于板状结构和碳板的合并.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 物理化学 物理化学
背景情况:
- 富勒,如C60,是基于碳的分子,具有独特的特性.
- 石墨烯是一种单层碳原子,排列在六角格子中.
- 在石墨烯板中封装富勒伦可以创建具有潜在应用的新型纳米结构.
研究的目的:
- 为了研究在石墨烯板之间封装的C60富勒的束诱导动力学.
- 为了确定温度对这些纳米结构在电子束辐射下的结构演变的影响.
- 了解聚合机制和由此产生的形态学.
主要方法:
- 异常校正高分辨率传输电子显微镜 (HRTEM) 在各种温度 (93 K, 293 K, 733 K) 中.
- 分子动力学 (MD) 模拟,包括第一原则和分析潜力方法.
- 测量初始损伤的临界剂量,并观察光束诱导的聚合.
主要成果:
- 对于C60富勒的初始损伤的临界剂量在很大程度上与温度无关.
- 波束诱导的聚合会在较低的温度 (93 K, 293 K) 上产生管状集群.
- 在更高的温度 (733 K) 观察到板状结构和曲碳板的合并.
结论:
- 温度显著影响了石墨烯内的光束诱导聚合富勒烯结构的形态.
- 较高的温度促进曲的碳板的融合,导致板状的聚合物结构.
- MD模拟支持实验观测,突出温度在纳米尺度结构转换中的作用.
相关概念视频
Fermi Level Dynamics
241
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
241
The de Broglie Wavelength
25.8K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
25.8K


