121st General Meeting of the KCS

Type Poster Presentation
Area Physical Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code PHYS.P-105
Subject Solvent Effect on the Formation of 1-Adamantyl Isocyanide Self-Assembled Monolayers on Au(111)
Authors NAMGYEONG LEE, Seul-ki Han, Young Ji Son, Jaegeun Noh*
Department of Chemistry, Hanyang University, Korea
Abstract Self-assembled monolayers (SAMs) are organic assemblies spontaneously formed on surfaces by adsorption of molecular constituents. The formation and structure of 1-adamantyl isocyanide SAMs on Au(111) prepared by solution deposition methods with two different solvents, ethanol and dimethylformamide (DMF), have been investigated by scanning tunneling microscopy (STM) and cyclic voltammetry (CV). STM imaging revealed that the surface structures of 1-adamantyl isocyanide SAMs under ethanolic solution are different from those under DMF solution. Even though both SAMs are prepared under same temperature and immersion time, the former showed striped phase with interline distance of 3.36 ± 0.13 nm, however, the latter showed striped phase with interline distance of 2.49 ± 0.09 nm. CV measurements showed that desorption peak of samples prepared from ethanolic solution was observed at around -850 mV, whereas that of samples prepared from DMF solution was observed at around -880 mV. This result may be due to the difference in packing structure of those SAMs. From these results, we found that the formation and 2-D surface structure of 1-adamantyl isocyanide SAMs were strongly influenced by solvents.
E-mail broccoli@hanyang.ac.kr