IRRAS and LEED studies of films of the long chain n-alkane n-C44H90 on Cu(1 0 0) and Cu(1 1 0)
IRRAS and LEED studies of films of the long chain n-alkane n-C44H90 on Cu(1 0 0) and Cu(1 1 0)
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DOI：
10.1016/s0169-4332(03)00129-6
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发表时间：
2003-05
影响因子：
6.7
通讯作者：
Y. Hosoi;Yoshie Niwa;Y. Sakurai;H. Ishii;Y. Ouchi;K. Seki
中科院分区：
文献类型：
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作者：
Y. Hosoi;Yoshie Niwa;Y. Sakurai;H. Ishii;Y. Ouchi;K. Seki
用红外反射吸收光谱（IRRAS）和低能电子衍射（LEED）研究了长链正构烷烃n-C44 H90在Cu（100）和Cu（110）表面的膜结构。在Cu（100）上的第一层由具有平坦几何形状的分子组成，其中碳骨架平面平行于衬底。分子轴沿[0 - 11]和[0-11]方向沿着排列。另一方面，Cu（1 - 10）上的第一层中的分子也采用平坦几何形状，其分子轴仅沿沿着[1-10]方向排列，反映了衬底表面的面内各向异性。在两个基板之间的多层膜中的分子取向没有观察到显着的差异。衬底只影响第一层，并且表面对称性限制分子排列。
The film structures of the long chain n-alkane n-C44H90on Cu(100) and Cu(110) were investigated by infrared reflection absorption spectroscopy (IRRAS) and low energy electron diffraction (LEED). The first layer on Cu(100) consists of the molecules oriented with the flat-on geometry where the carbon skeleton plane is parallel to the substrate. The molecular axes are arranged along [011] and [0-11] directions. On the other hand, the molecules in the first layer on Cu(110), which also adopt the flat-on geometry, are arranged with their molecular axes along only [1-10] direction, reflecting the in-plane anisotropy of the substrate surface. Noticeable difference in molecular orientation in the multilayers was not observed between the two substrates. The substrates affect only the first layers, and the surface symmetry restricts the molecular arrangement.