Embedded Files
P. Cladis, T. Garel, P. Pieranski
„Kossel diagrams show electric-field induced cubic-tetragonal
structural transition in frustrated liquid-crystal blue phases“
Phys. Rev. Lett. 57 (1986) 2841
P. Pieranski, P. Cladis, R. Barbet-Massin
„Experimental evidence for a hexagonal blue phase“
J. de Phys. Lettres 46 (1985) L973
R. Barbet-Massin, P. Pieranski
„Blue phase one - 1st optical measurements of the order parameter“
J. de Physique Lettres 45 (1984): L799
G. Heppke, B. Jérôme, H.-S. Kitzerow, P. Pieranski
"Electrostriction of BPI and BPII for blue phase systems with
negative dielectric anisotropy"
J. de Physique, 50 (1989) 549
Crystal growth, crystal shapes and surfaces
Crystal growth, crystal shapes and surfaces
Faceting of BPI crystallites observed in a reflecting microscope under monochromatic illumination. (a) Scheme of the setup (see also the scheme of the setup below). (b) Step on the {110} facet connected to a dislocation piercing the crystal. Its spiral shape indicates that the crystal is growing. (c) Nucleation and growth of a new terrace on the {110} facet. (d–f) Facetted BPI crystal seen along [200, 110] and [211] axes.
Observation of growth spirals on the (110) facet of a BPI-in-Isotropic crystal: a and f) photographs of steps taken with a reflecting microscope, b)schematic representation of the initial position of two steps connected to three dislocations labeled as +, +and −, c) the arrow points two steps coming into a contact during their motion (former position of steps is drawn with a dashed line), d) result of the recombination of the two steps, f) further motion of steps resulting from recombination.
Kossel diagrams
Kossel diagrams
Setup for observations of Kossel diagrams
Setup for observations of Kossel diagrams
Kossel diagram of the Blue Phase II
Heinz Kitzerow working on Kossel Diagrams
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