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Liquid crystals (lead by V. Novotna)

Investigations of novel liquid crystals with dipolar order, understanding of their phase diagram, topological defects and low frequency relaxations responsible for dielectric behaviour.

(More about this group)

Equipment

  • Polarizing microscope (NIKON Eclipse E600Pol) with the heating-freezing stage (THMS600 Linkam) used for texture observation, digital photo-camera NIKON COOLPIX 990
    (contact: V. Novotná, A. Bubnov, ext. 2134, room 147)

  • Multifunctional Oven BINDER VD23 for cell preparation/filling
    (contact: A. Bubnov, ext. 2134, room 147)

  • Impedance analysers (Hewlet/Packard 4192A and Schlumberger SI 1260) for dielectric spectroscopy study in the range of 0.1 Hz-30 MHz applied for dielectric spectroscopy measurements
    (contact: V. Novotná, A. Bubnov, ext. 2134, room 147)

  • Memory digital oscilloscopes (Le Croy 3904 and TEKTRONIX TDC70) for spontaneous polarisation and switching time measurement
    (contact: V. Novotná, A. Bubnov, ext. 2134, room 147)

  • Photoelastic modulator PEM 100 by HINDS Instruments, lock-in amplifier SR 844 (25 kHz-200 MHz, PIN diode and function generator (Philips PM 5191) in the birefringence measurements set-up
    (contact: V. Novotná, ext. 2134, room 147)