Assemblies of fluorine containing bent-shaped liquid crystal molecules studied by using scanning tunneling microscopy

Lin, Niu and Rahman, Md Lutfor and Yanlian, Yang and Chen, Wang (2010) Assemblies of fluorine containing bent-shaped liquid crystal molecules studied by using scanning tunneling microscopy. In: International Conference on Nanoscience and Technology (ChinaNANO 2009), 1-3 September 2009, Beijing, China.

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Official URL: http://dx.doi.org/10.1166/jnn.2010.2835

Abstract

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.

Item Type:Conference Paper (UNSPECIFIED)
Uncontrolled Keywords:Bent-Shaped Liquid Crystal, Scanning Tunneling Microscope, Self-Assembly
Subjects:Q Science > QD Chemistry
Divisions:SCHOOL > School of Science and Technology
ID Code:2214
Deposited By:IR Admin
Deposited On:11 Mar 2011 13:31
Last Modified:30 Dec 2014 09:35

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