Abstract
In this paper, a simple and powerful method to control the induced handedness of helical nanofilaments (HNFs) is presented. The nanofilaments are formed by achiral bent-core liquid crystal molecules employing a cholesteric liquid crystal field obtained by doping a rod-like nematogen with a chiral dopant. Homochiral helical nanofilaments are formed in the nanophase-separated helical nanofilament/cholesteric phase from a mixture with a cholesteric phase. This cholesteric phase forms at a temperature higher than the temperature at which the helical nanofilament in a bent-core molecule appears. Under such conditions, the cholesteric liquid crystal field acts as a driving force in the nucleation of HNFs, realizing a perfectly homochiral domain consisting of identical helical nanofilament handedness.
Highlights
In this paper, a simple and powerful method to control the induced handedness of helical nanofilaments (HNFs) is presented
polarized optical microscopy (POM) images of the state in P-9 doped with CLC-1R and the typical circular dichroism (CD) spectrum observed on a sample position in which the sign of the CD intensity at ~400 nm is negative
At 350–450 nm in the state, R-chiral dopant systems (R1011) induced large CD signals with negative signs, whereas S-chiral dopant systems (S1011) induced large CD signals with positive signs without exception. These results strongly indicate that a mono domain with uniform handedness of HNF can be realized by blending the CLC-2 series, and the chiral sense of the HNF can be controlled by the sense of the chiral dopant
Summary
A simple and powerful method to control the induced handedness of helical nanofilaments (HNFs) is presented. Two spontaneously segregated chiral domains consisting of opposite-handed HNFs are formed in the B4 phase because the BC molecule is achiral. Two chiral domains originating from the two opposite handedness of the helix in the B4 phase are observed by conventional polarized optical microscopy (POM) [13].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
