Adsorption of Fluorinated C60 on the Si(111)-(7×7) Surface Studied by Scanning Tunneling Microscopy and High-Resolution Electron Energy Loss Spectroscopy
Adsorption of Fluorinated C60 on the Si(111)-(7×7) Surface Studied by Scanning Tunneling Microscopy and High-Resolution Electron Energy Loss Spectroscopy
复制标题
扫描隧道显微镜和高分辨率电子能量损失谱研究氟化C60在Si(111)-(7×7)表面的吸附
DOI：
10.1143/jjap.41.245
复制
发表时间：
2002
影响因子：
1.5
通讯作者：
T. Sakurai
中科院分区：
文献类型：
--
作者：
Y. Fujikawa;J. Sadowski;K. Kelly;K. Nakayama;E. Mickelson;R. Hauge;J. Margrave;T. Sakurai
利用扫描隧道显微镜（STM）和高分辨率电子能量损失能谱（HREELS）研究了沉积在Si(111)-（7×7）表面的氟化C60分子的吸附结构。HREELS结果显示存在能量为103 ~ 107 meV的硅氟振动模式，表明部分氟原子从分子中分离出来并化学吸附到表面。在STM图像中直接观察到这些氟吸附位点在被吸附分子周围。许多氟吸附位点被发现形成线状结构。在表面上随机形成的F-Si键阻止了氟化富勒烯在Si(111)-（7×7）表面自由形成有序的单层。
The adsorption structure of fluorinated C60 molecules deposited on the Si(111)-(7×7) surface was studied using scanning tunneling microscopy (STM) and high-resolution electron energy loss spectroscopy (HREELS). The results of HREELS revealed the existence of the silicon-fluorine vibration modes with the energy of 103–107 meV, indicating that some of the fluorine atoms were detached from the molecules and chemisorbed to the surface. These fluorine adsorption sites were observed around the adsorbed molecules directly in the STM images. Many of the fluorine-adsorbed sites were found to form thread-like structures. Random formation of the F–Si bonds on the surface prohibits the fluorinated fullerene's freedom from forming an ordered monolayer on the Si(111)-(7×7) surface.