Institute of Applied Mechanics, Zhejiang University, Hangzhou 310027, China.
Nanoscale. 2012 Apr 28;4(9):2920-5. doi: 10.1039/c2nr00059h. Epub 2012 Mar 29.
Interaction between single noble metal atoms and graphene edges has been investigated via aberration-corrected and monochromated transmission electron microscopy. A collective motion of the Au atom and the nearby carbon atoms is observed in transition between energy-favorable configurations. Most trapping and detrapping processes are assisted by the dangling carbon atoms, which are more susceptible to knock-on displacements by electron irradiation. Thermal energy is lower than the activation barriers in transition among different energy-favorable configurations, which suggests electron-beam irradiation can be an efficient way of engineering the graphene edge with metal atoms.
通过像差校正和单色传输电子显微镜研究了单个贵金属原子与石墨烯边缘之间的相互作用。在能量有利构型之间的转变中，观察到 Au 原子和附近碳原子的集体运动。大多数捕获和脱捕获过程都受到悬挂碳原子的辅助，这些碳原子更容易受到电子辐照的非弹性位移的影响。热能低于不同能量有利构型之间转变的激活能垒，这表明电子束辐照可以成为用金属原子工程化石墨烯边缘的有效方法。
