TY  - JOUR
A1  - Gharagozloo-Hubmann, Kati
A1  - Kulikovska, Olga
A1  - Boerger, Volker
A1  - Menzel, Henning
A1  - Stumpe, Joachim
T1  - Surface relief gratings in azobenzene-containing polymers with linear and star-branched architectures : a comparison
N2  - The influence of molecular architecture on light-induced SRG formation was investigated. Polymers with different degree of branching were synthesized by ATRP and functionalized with azobenzene chromophores. The polymers differ only in their architecture - linear, 4-, 6-, or 12-arms stars. The photo-induced dichroism as well as the efficiency of SRG formation was similar for all polymers of this series. New consideration for the origin of the driving force was used to explain this behavior. The comparable SRG inscription rate in differently branched polymers can be rationalized by assuming that azobenzene acts as an internal molecular motor and can cause a non-turbulent motion on a scale smaller than that on which normal entanglement restriction forces act.
Y1  - 2009
UR  - http://www3.interscience.wiley.com/journal/10003495/home
U6  - https://doi.org/10.1002/macp.200900218
SN  - 1022-1352
ER  - 
TY  - JOUR
A1  - Koenig, Tobias
A1  - Goldenberg, Leonid M.
A1  - Kulikovska, Olga
A1  - Kulikovsky, Lazar
A1  - Stumpe, Joachim
A1  - Santer, Svetlana
T1  - Reversible structuring of photosensitive polymer films by surface plasmon near field radiation
JF  - Soft matter
N2  - We report on the fabrication and characterisation of a novel type of hybrid azo-modified photosensitive polymer film with a nanoscale metallic structuring integrated into the substrate. The metal structures permit to generate surface plasmon near fields when irradiated by UV-light from the rear without directly illuminating the polymer. This allows establishment of a localized, complex-shape intensity distribution at sub-wavelength resolution with a corresponding impact on the photosensitive polymer. The possibilities of exploiting this setup are manifold. We find that just by using the change of polarization of the incident light as means of control, the topography can be driven to change between various patterns reversibly. These results are confirmed by numerical simulations and compared with in situ recorded topography changes.
Y1  - 2011
U6  - https://doi.org/10.1039/c0sm01164a
SN  - 1744-683X
VL  - 7
IS  - 9
SP  - 4174
EP  - 4178
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -