Adsorption of L-Phenylalanine on Cu(001)

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2001,（3）
• 所属期刊栏目: CENERAL
• 页码范围: 445-448
• 页数: 4页
• 分类号: 04
• 语种: 英文

摘要

Adsorption of Phenylalanine on a Cu(001) Surface was studied by means of scanning tunnelling microscopy in ultrahihg vacuum and has been found to result in only one superstructure,i.e.,(2×4)Moreover, it induces steps faceting to <310>directions and faceted steps bunching to form{3 1 1 7}facets. In view of the small size of the c(2×4)unit cell,the phenyl ring of the molecule is suggested to be orientated nearly perpendicular rather than parallel to the surface. Amodel has thus been proposed for the c(2×4)superstructure,where the ωstacking interactions between neinhbouring phenyl rngs ,in addition to hydrogen bond formation,are expected to play an important role in the stabilization of the Superstructure