| 초록 |
A programmed amphiphilic tetrathiafulvalene molecule (amph-7TTF14) was newly designed and synthesized. From the 2D WAXD pattern of the macroscopically oriented amph-7TTF14 film, the crystal structure was identified to be a monoclinic unit cell. The face-to-face π-π interaction between TTF groups and the nanophase separation between rigid TTF groups and flexible hydrophobic alkyl and hydrophilic tri(ethylene oxide) tails were the main driving forces for the self-assembly of amph-7TTF14. The morphological observations using transmission electron microscopy, atomic force microscopy, and polarized optical microscopy indicated that the amph-7TTF14 formed not only flat ribbons but also scrolls and helixes, in which the ribbons further aggregated to create the fibrous hierarchical structures. Based on the experimental results, it was realized that the scrolls and helices were induced by the unbalanced surface stresses generated during the crystallization process. |
