| 초록 |
π-conjugated organic molecules can be controlled optoelectrical properties easily because of the concentration-fluorescence quenching phenomenon that occurs when fluorescent organic materials aggregate. Trans-stilbene derivatives are one example of fluorescent organic molecules which are appeared ‘unit aggregate’. The nearest neighbors show an edge-to-face arrangement to make the extended array in films. Fluorescent probe molecule, (2Z,2'Z)-2,2'-(1,4-phenylene)bis(3-(4-butoxyphenyl)acrylonitrile) (DBDCS), at the air-water interface and Langmuir-Blodgett film have been investigated by ΠA isotherm, AFM, STM, and X-ray reflectivity. If materials expose to UV and visible light for a long time, cis/trans isomerization of cyano-stilbene can be occur in solution. As a result of this, ΠA isotherms of different shape are observed in different light conditions. Nano-sheet structure due to the arranged aggregation was shown by AFM From fabricated monolayer films. |
