铜
奥斯特瓦尔德成熟
扩散
材料科学
表面扩散
化学物理
氨基酸
分子
冷凝
结晶学
金属
物理化学
纳米技术
化学
有机化学
热力学
吸附
冶金
生物化学
物理
作者
Nathan P. Guisinger,Andrew J. Mannix,Rees B. Rankin,Brian Kiraly,Jesse A. Phillips,Seth B. Darling,Brandon Fisher,Mark C. Hersam,Erin V. Iski
标识
DOI:10.1002/admi.201900021
摘要
Abstract Surface diffusion and molecular self‐assembly are two critically important processes in chemistry and nature. Amino acids deposited on a Cu(111) surface driving a separation at the 2D limit between self‐assembling molecules and diffusing copper atoms is reported. Since the self‐assembling amino acids prefer non‐planar, tridentate bonding with neighboring adatoms, they attach to and immobilize diffusing copper adatoms on the surface. This chemical interaction freezes out the copper diffusion causing the condensation of “solid” copper adatom islands on the surface. Such separation and immobilization are observed for eight different amino acids, suggesting the generality of this phenomenon beyond a single amino acid species. Furthermore, at elevated temperatures, a disruption of the prototypical Ostwald ripening of adatom islands is also observed. These results provide fundamental insight into chiral molecular self‐assembly and its interplay with metal atom surface diffusion.
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