A comparative STM-investigation of monolayers of n-alkanes and arachidic acid on the liquid tetradecane-graphite interface

作者：Senenko A I^*; Stryzheus D V; Marchenko A A; Naumovets A G

来源：Materialwissenschaft und Werkstofftechnik, 2011, 42(1): 55-58.

DOI：10.1002/mawe.201100731

• arachidic acid
• n-alkanes
• graphite
• liquid-solid interface
• scanning tunneling microscopy

Highly ordered monolayer films of an n-alkane and arachidic acid were deposited on graphite surface from their solutions in n-tetradecane, and their molecular structure was investigated by scanning tunneling microscopy. Close-packed lamella-like structures with long range order were observed. In alkane monolayers, each lamella is composed by single molecules, while in the case of acid, lamellas consist of dimers formed by acid molecules due to interaction between their carboxylic groups, probably via hydrogen bonds. An increased brightness of carboxyl head in each fifth acid molecule was observed, which is attributed to nonequivalent positions of acid molecules with respect to the substrate carbon atoms.

• 出版日期2011-1