TY  - JOUR
A1  - Stiller, Burkhard
A1  - Köpnick, Thomas
A1  - Muzikante, I.
A1  - Neilands, O.
A1  - Utinans, M.
A1  - Dubrovich, O.
A1  - Karageorgiev, Peter
A1  - Brehmer, Ludwig
T1  - Optically induced switching effect of polymer containing indandione-1,3-pyridinium betaine side chains
Y1  - 1999
SN  - 0378-2271
ER  - 
TY  - JOUR
A1  - Gustina, D.
A1  - Markava, E.
A1  - Muzikante, I.
A1  - Stiller, Burkhard
A1  - Brehmer, Ludwig
T1  - Photoisomerisation process of self-assembled monolayers of some novel azobenzenes
Y1  - 1999
ER  - 
TY  - BOOK
A1  - Muzikante, I.
A1  - Fonavs, E.
A1  - Brehmer, Ludwig
A1  - Stiller, Burkhard
T1  - Photoinuced phenomena in corona poled polar organic films
N2  - Organic materials have received considerable attention because of their large dipole moments and optical nonlinearities. The optically induced switching of material properties is important for studying the optoelectronic effects including second harmonic generation. Organic materials for photonic applications contain chromophore dipole which consist of acceptor and donor groups bridged by a delocalized pi-electron system. Both theoretical and experimental data show a reversible highly dipolar photoinduced intra molecular charge transfer in betaine type molecules accompanied by change of the sign and the value of the dipole moment. The arrangement of polar molecules in films is studied both by atom force microscopy and surface potential measurements. To understand the photo response of these materials, their spectroscopic and electrical properties are studied. The morphology and photoinduced surface potential switching of the self-assembled monolayers and polymer films are investigated. (c) 2005 Elsevier B.V. All rights reserved
Y1  - 2005
ER  - 
TY  - JOUR
A1  - Muzikante, I.
A1  - Fonavs, E.
A1  - Tokmakov, A.
A1  - Cepite, D.
A1  - Stiller, Burkhard
A1  - Brehmer, Ludwig
A1  - Neilands, O.
T1  - Optical and electrical properties of oriented thin films of oligomer containing betaine-type moiety in side chain
N2  - Non-linear optical and electrical properties of polymer films obtained by dipole orientation of active units are reported. Novel polar oligomer with N-(indan-1,3-dion-2-yl)pyridinium betaine (IPB) as a side group is studied. Orientation of polar groups in oligomer thin films causes an increase of the photo-induced change of surface potential on irradiation in the region of photo-induced electron transfer (PIET) where the IPB group exhibits a reversible change of the value and sign of the dipole moment. At longer wavelengths, the value of the surface potential of the oligomer may be determined by transport of photo-generated charge carriers
Y1  - 2005
SN  - 0370-1972
ER  -