Assemblies of Fluorine Containing Bent-Shaped Liquid Crystal Molecules Studied by Using Scanning Tunneling Microscopy

作者：Niu, Lin; Lutfor, M. R.; Yang, Yanlian^*; Wang, Chen

来源：Journal of Nanoscience and Nanotechnology, 2010, 10(11): 7271-7276.

DOI：10.1166/jnn.2010.2835

• Bent-Shaped Liquid Crystal
• Scanning Tunneling Microscope
• Self-Assembly

In this work we prepared a fluorine containing bent-shaped liquid crystal from biphenyl as the central core and rod-like azobenzene mesogens as the side arms, namely 4',3-biphenyl bis[4-(4'-hexadecanloxy-3-fluorophenylazo)benzoate] (L104). The self-assembly behaviors of L104 molecules on graphite surface were investigated by using scanning tunneling microscopy (STM) under ambient conditions. The high-resolution STM images of L104 assemblies revealed three kinds of structures showing the joint effects of dipole dipole interactions originated from the fluorine and the bent-core alignments for maximizing pi-pi interactions. These observations may be beneficial for understanding the assembly mechanism and designs for novel banana-shaped liquid crystal molecules.

• 出版日期2010-11
• 单位国家纳米科学中心