Zobrazeno 1 - 10
of 107
pro vyhledávání: '"J. Fünfschilling"'
Autor:
J. Fünfschilling
Relaxation phenomena of excited molecular states are abundant in all nature. They mediate such key processes as photochemical reactions or even the pathways of ordinary chemical reactions. However, for a long time the main research in electronic rela
Publikováno v:
Journal of Applied Physics. 80:3155-3161
Submicron orientational patterns were created in thin liquid crystal polymer films. A rubbed polyimide layer was locally modified by hatching it with the small tip of a simplified atomic force microscope. A nematic liquid crystal mixture, that can be
Autor:
S. M. Kelly, J. Fünfschilling
Publikováno v:
Liquid Crystals. 20:77-93
A series of 2-(4-octylphenyl)pyridin-5-yl alkanoates has been synthesized and found to exhibit smectic mesomorphism including the smectic C phase. The influence on the transition temperatures of introducing a carbon-carbon double bond in the terminal
Publikováno v:
Liquid Crystals. 10:243-260
About 40 diverse phenyl benzoate esters incorporating a trans-1-4-disubstituted cyclohexane ring joined to the central aromatic core by new four unit linking groups (C4H8, C4H6, C3H6O and C3H4O) have been synthesized. The effect of various lateral su
Publikováno v:
The Journal of Chemical Physics. 93:4652-4658
Nonphotochemical hole burning in glassy host/guest matrices generates a change of the site energy distribution of the guest molecules. This distribution of shifted energies has been determined by deconvoluting the difference of white‐light excited
Publikováno v:
Journal of Luminescence. 46:301-309
Phosphorescence hole burning in coronene embedded in glassy matrices at 1.9 to 3.0 K is reported. The external heavy-atom effect strongly increases the hole burning rate. The quantum yield for hole formation is evaluated to be 10-3-10-2. The influenc
Publikováno v:
Chemical Physics Letters. 190:72-74
The mechanism of phosphorescence hole burning of coronene embedded in a glassy matrix is investigated. We find a linear relation between the phosphorescence hole burning rate and the incident light intensity. This supports the single photon hole burn
Publikováno v:
SID Symposium Digest of Technical Papers. 30:308
Our linearly photopolymerized LPP photo-alignment technology enables to optically align liquid crystals, thus avoiding mechanical brushing. We show that hybrid photoaligned LPP/LCP liquid crystal polymer- layers as thin as 12nm exhibit excellent alig
Autor:
M. Schadt, J. Fünfschilling
Publikováno v:
Liquid Crystals Today. 1:7-7
We present a new type of bistable electro-optical device based on ferroelectric S c * liquid crystals exhibiting a short pitch (0.43 µm) and a large spontaneous polarization (50···150 nC/cm2). Features of the new short pitch bistable ferroelectri
Publikováno v:
Chemical Physics Letters. 110:315-318
The temperature dependence from 1.8 to 4.2 K of The linewidth of phosphorescence site-selection spectra has been measured with a Fabry-Perot interferometer. For coronene and 5-bromoacenaphthene in 1-bromobutane, the linewidth follows a T1.25±0.2 pow