Induction of the vector polyphotochromism in side-chain azopolymers

The authors gratefully acknowledge support by the Shota Rustaveli National Science Foundation [grants number 04/06 and AR/209/6-120/14] and Science& Technology Center in Ukraine [grant number 6069].Peer reviewedPostprin

The role of conductivity and molecular mobility on the photoanisotropic response of a new azo-polymer containing sulfonic groups

This work was supported by the University Malaya under the UMRG grant RP038B-17AFR. NFKA and AMF would like to thank the Royal Academy of Engineering, U.K., and Academy of Science, Malaysia, for the grant NRCP1516/4/61, from the Newton Research Collaboration Programme, and the University of Aberdeen, for the award of the grant SF10192, corresponding to the Global Challenge Research Fund Internal Pump Priming Fund Round 2. AMF would like to acknowledge the Carnegie Trust for the Universities of Scotland for the award of one Scottish Research Incentive Grant (RIG008586).Peer reviewedPostprintPostprin

Intermodal transportation as a quality improvement tool in tourism industry

The international tourism, with its developed transport infrastructure, transforms the earlier closed community into the open one, where the communications between the representatives of different countries become the everyday routine. Georgia has strategic geopolitical location on the conjunction of Europe and Asia and holds all the abilities to develop different types of passenger transportation and it enhances the further development of international tourism in the country. The authors examine the condition of country’s transport infrastructure and organization of passenger transportation via different types of transport, aiming to carry out the directions of improving the quality of tourist’s transport service and raising the competitiveness of tourism industry in Georgia, the authors proposed Intermodal Transportation Service Center as a tool of improving the quality of tourism services

Photoanisotropy in polarization-sensitive polymer materials based on the media with covalently-bonded components

Event: SPIE OPTO, 2017, San Francisco, California, United States: Organic Photonic Materials and Devices XIX.The well-known scalar photochromism phenomenon is a reversible phototransformation of chemical species between two forms having different absorption spectra. It is observed under the action of actinic light regardless of its polarization state. Unlike this in some high-efficient polarization-sensitive azopolymeric materials, we have observed a welldeveloped vector polyphotochromism which appears as a light-induced area with spectral selectivity for the linearly polarized probing beams. A sharp change in the transmission spectrum of the material have been observed when we placed an irradiated area of the sample between crossed polarizers, while the transmission spectrum of the sample remained practically unchanged in case of probing by unpolarized light. The effect has a purely vector nature, while the transmission spectrum of the exposed material essentially changes in case of observing between crossed polarizers and the change in the spectrum unambiguously depends on the energy exposure. A significant dependence of the kinetic of the vector polyphotochromism induction on the power density of linearly polarized actinic light (445 nm) is shown for probing beam of 635 nm. It is also shown that the kinetics of the effect depends on the photosensitive layer thickness and the concentration of the chromophore. The experiments were carried out for two synthesized side-chain azopolymers obtained as immobilized polar azo dyes on polymethylmethacrylate backbone. It is clearly shown a light-controlled spectral selectivity of the sample activated by the various doses of the stimulating radiation.The authors gratefully acknowledge support by the Shota Rustaveli National Science Foundation and Science & Technology Center in Ukraine (STCU) under grants No. AR/209/6-120/14 and No. 6069 (04/06).Peer reviewe