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Kinetics of Photochemical Processes in Photochromic Azobenzene Derivatives: Effect of Matrix and of The Phase Stability
Krzysztof Janus, Katarzyna Matczyszyn and Juliusz Sworakowski
Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Poland
Electronic and Magnetic Dynamic Properties of Imidazolate Complexes
F. Ragot1, S. Belin2, V.G. Ivanov3, D.L. Perry4, M. Ortega4, T.V. Ignatova5, I.G. Kolobov5, E.S. Masalitin5, G.V. Kamarchuk5, A.V. Yeremenko5, P. Molinie1, J. Wery1
and E. Faulques1
1 Institut des Materiaux Jean Rouxel, Nantes, France
2LURE, Orsay, France
3Faculty of Physics, University of Sofia, Bulgaria
4Lawrence Berkeley National Laboratory, Berkeley, USA
5B. Verkin Institute for Low Temperature Physics and Engineering, Kharkov, Ukraine
The Use of Vibronic Phenomena in Adsorption Phase for Developing of Semiconductor Gas Sensors
Vladimir Zaitsev1, Barbara Kebbecus2
1 M. V. Lomonosov Moscow State University, Physics Dpt., Russia
2 New Jersey Institute of Technology, USA
Abstract
Semiconductor sensor selectivity is of the most importance for environment monitoring. The surface modifications and multi-sensor systems are widely used for the selectivity increasing in commercial sensors. This presented work is an experimental study aimed to show the use of fine vibrational phenomena on the semiconductor surface for the increase of the sensor selectivity. Our experiments showed that a resonant vibrational energy transfer from the photo excited adsorbed dye could exist if gas molecules have correspondent vibrational modes. This energy transfer controls both a luminescent signal from the dye and an electrical response of the semiconductor substrate. The sensor selectivity in this case is due to the overlapping of rich vibrational spectra of the molecules. We have shown that isotopes can be distinguished from each other in this way since they have different vibrational frequencies. This could not be done with traditional "chemiresistors". The selective sensor for specific gas molecules could be produced in this way by depositing on the semiconductor surface organic dye molecules with vibrational modes "tuned" to the vibrations of those gas molecules.
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Download article (PDF)The Study of Polystyrene Surface Local Mechanical Properties by the Atomic Force Microscopy
Anna V. Zaitseva1, Victor M. Rudoi2, Olga V. Dement'eva2, Maria E. Kartseva2
1 M. V. Lomonosov Moscow State University, Physics Dpt., Russia
2 Institute of Physical Chemistry RAS, Moscow, Russia
Dependence of Polymerization Ability of Maleimidophenylmethacrylates from Π-electron Structure of Maleimide fragments
L.Yu. Gryshchuk, L.O. Vretik, V.G. Syromyatnikov
Kyiv Taras Shevchenko University, Ukraine
Optical Properties of Ferroelectric Langmuir-Blodgett Films Impregnated with Dye Molecules
V. B. Zaitsev, A. N. Nevzorov, G. S. Plotnikov
M. V. Lomonosov Moscow State University, Physics Department, Moscow, Russia
High-conductivity Organic Metals as Electrode Materials
A.P. Pospelov1, M.V. Ved1, Nikolay D. Sakhnenko1,
Y.L. Alexandrov1, V.V. Shtefan1, A.V. Kravchenko2, G.V. Kamarchuk3
1National Technical University Kharkov Polytechnical Institute, Kharkov, Ukraine
2V. Karazine Kharkov National University, Kharkov, Ukraine
3B. Verkin Institute for Low Temperature Physics and Engineering, Kharkov, Ukraine
Calixarene-based QCM Sensors Array and Its Response to Volatile Organic Vapours
V.I. Kalchenko1, I.A. Koshets2 , E.P. Matsas2, O.N. Kopylov2,
A. Solovyov1, Z.I. Kazantseva2, Yu. M. Shirshov2
1Institute of Organic Chemistry, NAS of Ukraine, Kiev, Ukraine
2Institute of Semiconductor Physics, NAS of Ukraine, Kiev, Ukraine
