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结合低能电子衍射(LEED)及其消失斑点规律和扫描隧道显微镜(STM)手段确定了室温下甘氨酸在Cu(001)表面能形成c(2×4)和两种(2×4)吸附结构((2×4)1和(2×4)2),并推断出在两种(2×4)结构单胞中两甘氨酸分子的羧基相对于衬底的吸附取向一致,而它们的氨基则不同.实验中还观察到c(2×4)与(2×4)2结构能相互转变成窄条相互穿插共存,这说明几种吸附结构能量相近.
The results showed that glycine can form c (2 × 4) and two (2 × 4) adsorbents on Cu (001) surface at room temperature by combining LEED with its disappearing speckle and scanning tunneling microscope (STM) (2 × 4) 1 and (2 × 4) 2), and concluded that the orientation of the carboxyl groups of the two glycine molecules in the two (2 × 4) building blocks is consistent with the adsorption orientation of the substrate while their amino groups are different . It is also observed in the experiment that the structures of c (2 × 4) and (2 × 4) 2 can transform into narrow strips to co-exist with each other, indicating that the energy of several adsorption structures is similar.