论文标题
部分氢化石墨烯/Ni（111）表面的结构和动力学研究
Structure and dynamics investigations of a partially hydrogenated graphene/Ni(111) surface
论文作者
论文摘要
使用氦3原子散射，我们研究了原子氢在Ni上的石墨烯单层表面上的吸附动力学，结构和扩散动力学（111）。衍射测量结果显示出4 $^\ CIRC $旋转的矩形氢排行。氢吸附和解吸表现出$ e_a =（89 \ pm7）\，$ meV和$ e_d =（1.8 \ pm0.2）\，$ ev的激活壁垒。在光谱仪的时间范围内，氦3自旋回波测量没有显示空间相关函数（或中间散射函数）的衰减。因此，我们能够为可能的氢表面扩散速率设置下限。
Using helium-3 atom scattering, we have studied the adsorption kinetics, the structure and the diffusional dynamics of atomic hydrogen on the surface of a graphene monolayer on Ni(111). Diffraction measurements reveal a 4$^\circ$ rotated rectangular hydrogen overstructure. Hydrogen adsorption and desorption exhibit activation barriers of $E_a=(89\pm7)\,$meV and $E_d=(1.8\pm0.2)\,$eV, respectively. Helium-3 spin-echo measurements showed no decay of the spatial correlation function (or intermediate scattering function) within the time range of the spectrometer. Hence, we are able to set lower limits for a possible hydrogen surface diffusion rate.
