@inbook{3dfd3c935d194f238f5ba401a33c4a62,
title = "Cholesteric liquid crystalline polymer networks as optical sensors",
abstract = "In the past decade, chiral nematic liquid crystals (LCs) have emerged as an attractive material for the development of stimuli-responsive systems (White et al. 2010; Ge and Yin 2011; Fenzl et al. 2014; Mulder et al. 2014; Stumpel et al. 2014). Due to the periodic alteration of their refractive indices, they act as one-dimensional photonic structures and reect circularly polarized light of same handedness. The reection of light is governed by Bragg{\textquoteright}s law: λ θb = nP cos where λb is the wavelength of Bragg reection, n is the average refractive index, and P is the length of the helical pitch. The pitch of a chiral nematic is dened as the length traversed by the molecular director nˆ on 360° rotation (Figure 4.1a). It is inversely proportional to the concentration [C] as well as the helical twisting power β",
author = "M. Moirangthem and A.P.H.J. Schenning",
year = "2017",
month = jan,
day = "1",
language = "English",
isbn = "9781498729727",
series = "The Liquid Crystals Book Series",
publisher = "CRC Press",
pages = "83--101",
editor = "A.P.H.J. Schenning and G.P. Crawford and D.J. Broer",
booktitle = "Liquid Crystal Sensors",
}