Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Franz-Heinrich Kreuzer is active.

Publication


Featured researches published by Franz-Heinrich Kreuzer.


Molecular Crystals and Liquid Crystals | 1991

Cyclosiloxanes with mesogenic side groups

Norman Dr. Häberle; Wolfgang Dr. Haas; Franz-Heinrich Kreuzer

Abstract Cyclic liquid crystalline siloxanes (CLCS) are optical uniaxial positive (SA, N) and negative (N*) materials in accordance with calamitic structures. X-Ray measurements indicate, that the distances of SA layers correspond with the length of the monomer unit. In the case of mesogens with high polarity the distance is 1.7 fold the length of the monomer unit. A bundle model is proposed for CLC siloxanes.


Journal of Materials Chemistry | 1996

Dielectric relaxation in four cyclic liquid-crystalline oligosiloxanes with different ring size and spacer length

Eckhard Jakob; Franz-Heinrich Kreuzer; Norman Dr. Häberle; Dirk Kilian; W. Haase

Using dielectric spectroscopy in the frequency range 100 Hz to 13 MHz, the molecular dynamics of cyclic liquid-crystalline oligosiloxanes have been investigated. Up to two relaxation processes were found, depending on different molecular dipole components. The compounds were aligned and as well as temperature-dependent spectra, bias-field-dependent spectra were recorded to show clearly the behaviour of each component while aligned in the electric field. The influence of the ring size on the dielectric relaxation behaviour is described as well as the influence of the spacer length.


Journal of Chemical Research-s | 1998

Azo Dyes as Side Chains in Liquid Crystalline Oligomers for Holographic Application

Oliver Haak; Cheung-Bok Jeoung; Andreas Pawlik; Peter Boldt; Walter Grahn; Franz-Heinrich Kreuzer; Horst Leigeber; Hans-Peter Dr. Weitzel

In a systematic study on materials for holographic data storage, a wide variety of azo dyes of different shapes and optical properties were covalently bound to cholesteric liquid crystalline oligosiloxanes; some of these materials exhibit high holographic efficiency and/or sensitivity but no general correlation between the holographic writing efficiency and/or the sensitivity with the structure was found.


Archive | 1993

Pigments whose color depends on the viewing angle, their preparation and use

Christoph Dr. Müller-Rees; Robert Maurer; Jürgen Dr. Stohrer; Franz-Heinrich Kreuzer; Silvia Jung; Franz Csellich


Archive | 1993

Pigmente mit vom Betrachtungswinkel abhängiger Farbigkeit, ihre Herstellung und Verwendung

Christoph Dr. Müller-Rees; Robert Maurer; Jürgen Dr. Stohrer; Franz-Heinrich Kreuzer; Silvia Jung; Franz Csellich


Archive | 1993

Pigments with colour dependant on viewing angle, it's production and use

Christoph Dr. Müller-Rees; Robert Maurer; Jürgen Dr. Stohrer; Franz-Heinrich Kreuzer; Silvia Jung; Franz Csellich


Macromolecular Symposia | 1991

Liquid‐crystalline silsesquioxanes

Franz-Heinrich Kreuzer; Robert Maurer; Peter Spes


Archive | 2000

Thermostable pigments, films and effect coatings, and mixtures for their production

Michael Kasch; Jürgen Dr. Küpfer; Franz-Heinrich Kreuzer


Archive | 1998

Process for the production of three-dimensionally crosslinked polymeric materials having broad cholesteric reflection bands, and filters, reflectors and polarizers produced by this process

Horst Leigeber; Eckhard Hanelt; Franz-Heinrich Kreuzer


Archive | 2001

Methods for preparing flakes

Adolf Gurtner; Franz-Heinrich Kreuzer; Horst Leigeber; Volker Dr. Stanjek

Collaboration


Dive into the Franz-Heinrich Kreuzer's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Oliver Haak

Braunschweig University of Technology

View shared research outputs
Researchain Logo
Decentralizing Knowledge