Morphological transition of a conductive molecular organization with non-covalent from nanonetwork to nanofiber

作者：Fujimori Atsuhiro^*; Yamato Rie; Kikkawa Takahiro; Tatewaki Yoko

来源：Journal of Colloid and Interface Science, 2015, 448: 180-188.

DOI：10.1016/j.jcis.2015.02.024

• Morphological transition from nanonetwork to nanofiber
• One-dimensional growth
• TTF derivative
• Conductive molecular films
• Chiral group

The formation of nanofiber morphology at a mesoscopic scale, and molecular level stacking of a tetrathiafulvalene (TTF) derivative with a chiral group were investigated by the one-dimensional growth method in interfacial molecular films. Monomolecular films of a 17F derivative with a chiral borneol group display a two-dimensional phase transition at the air/water interface. At high surface pressures, nanonetwork domains are formed, where the TTF molecular planes are densely packed with an interlayer distance of 4.1 A. The formation of this network is attributed to the organized aggregation of the TTF derivatives, which is a result of strong intermolecular interactions. Subsequently, the growth of morphology is encouraged by the application of the one-dimensional growth method at low surface pressure conditions, varying compression speeds, and subphase temperatures. At low surface pressure and a subphase temperature of 15 C, the 17F derivatives aggregated as nanofibers with close packing of molecules. Upon raising the subphase temperature, the thickness of the nanofibers was found to increase and hence, spontaneous morphogenesis at the air/water interface was achieved.

• 出版日期2015-6-15