Journal
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Volume 468, Issue 2142, Pages 1521-1542Publisher
ROYAL SOC
DOI: 10.1098/rspa.2011.0685
Keywords
liquid crystals; chirality; helicity; enantiopurity; ferroelectricity; liquid crystal displays
Categories
Funding
- QinetiQ
- Kingston Chemicals Ltd
- Merck Chemicals
- The Leverhulme Trust
- EPSRC
- EPSRC [EP/D055261/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D055261/1] Funding Source: researchfish
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The World, and much of Nature that we see within it, experiences an environment of reduced symmetries. For example, living organisms are dependent on asymmetric or dissymmetric structures for their life processes. In the solid state, a large number of space groups are chiral. Conversely, in liquids, the effects of reduced symmetries are smeared out owing to the dynamical fluctuations of the constituent molecules, atoms or ions. Thus, on progressing from the strongly ordered solid to the amorphous liquid state, the effects of reduced symmetries weaken as the molecular or atomic correlations and penetration lengths fall. Between these two states of matter, the fourth state of organized fluids can be markedly affected by chirality, and over substantial length scales, owing to both the fluidity and partial ordering of the molecules. In effect, complex fluids can amplify the effects of chirality at the molecular level. Broken symmetries in self-organizing systems can lead to the formation of novel phases of matter and to the creation of structured liquids, and to the generation of nonlinear properties such as heli-, ferro-, ferri- and antiferro- electricity, and electroclinism, which can be harnessed in a wide range of applications including thermal sensors, imaging devices and information displays, to name but a few.
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