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2016 | Buch

A First Example of a Lyotropic Smectic C* Analog Phase

Design, Properties and Chirality Effects

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Über dieses Buch

In this thesis Johanna Bruckner reports the discovery of the lyotropic counterpart of the thermotropic SmC* phase, which has become famous as the only spontaneously polarized, ferroelectric fluid in nature. By means of polarizing optical microscopy, X-ray diffraction and electro-optic experiments she firmly establishes aspects of the structure of the novel lyotropic liquid crystalline phase and elucidates its fascinating properties, among them a pronounced polar electro-optic effect, analogous to the ferroelectric switching of its thermotropic counterpart. The helical ground state of the mesophase raises the fundamental question of how chiral interactions are "communicated" across layers of more or less disordered and achiral solvent molecules which are located between adjacent bi-layers of the chiral amphiphile molecules. This thesis bridges an important gap between thermotropic and lyotropic liquid crystals and pioneers a new field of liquid crystal research.

Inhaltsverzeichnis

Frontmatter
Chapter 1. Introduction
Abstract
In this thesis a lyotropic analog of the thermotropic chiral smectic C (SmC*) phase is presented for the first time. So far, only very scarce examples of the achiral variant of this phase have been known in lyotropic liquid crystals and no comprehensive studies have been performed on them.
Johanna Ricarda Bruckner
Chapter 2. Aims and Scope of this Thesis
Abstract
Thermotropic and lyotropic liquid crystals share a common state of matter with many analogies in their structural and physical properties. However, these two fields of liquid crystalline research are usually treated completely separately.
Johanna Ricarda Bruckner
Chapter 3. Thermotropic and Lyotropic Liquid Crystals
Abstract
In this chapter, the structural properties of thermotropic and lyotropic liquid will be compared. In a first step, the driving forces for the formation of the mesophases, as well as the building blocks of the two types of liquid crystals will be analyzed.
Johanna Ricarda Bruckner
Chapter 4. Materials and Experimental Techniques
Abstract
In this chapter the materials as well as the preparation of samples for further investigations will be described. Additionally, experimental techniques for all applied methods will be explained in detail.
Johanna Ricarda Bruckner
Chapter 5. Results and Discussion
Abstract
The experimental results of the present thesis will be presented and discussed in the following chapter. The main focus will be upon the detection and characterization of the novel lyotropic SmC* analog phase, even though a variety of other phases occurs in the investigated solvent/surfactant mixtures. Furthermore, the obtained results will be discussed in detail in the course of this chapter.
Johanna Ricarda Bruckner
Chapter 6. Summary
Abstract
The subject of this thesis is the discovery and characterization of the lyotropic analog of the well-known thermotropic ferroelectric SmC* liquid crystal phase. In addition to providing evidence for the existence of this previously unknown phase, the main focus of the work presented is on the investigation of its structural properties and chirality effects.
Johanna Ricarda Bruckner
Backmatter
Metadaten
Titel
A First Example of a Lyotropic Smectic C* Analog Phase
verfasst von
Johanna Ricarda Bruckner
Copyright-Jahr
2016
Electronic ISBN
978-3-319-27203-0
Print ISBN
978-3-319-27202-3
DOI
https://doi.org/10.1007/978-3-319-27203-0

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