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Articles by Fiore Pasquale Nicoletta
Total Records ( 2 ) for Fiore Pasquale Nicoletta
  Roberta Cassano , Roman Dabrowski , Jerzy Dziaduszek , Sonia Trombino , Francesca Iemma , Fiore Pasquale Nicoletta , Giovanni De Filpo and Nevio Picci
  The synthesis, characterisation, helical pitch and electro-optical response of new ferroelectric liquid crystals, 4’-(ω-acryloxyalkoxy)-, 4’-(ω-alkanoyloxyalkoxy)- or 4’-(ω-perfluoroalkanoyloxy)alkoxybiphenyl-4-yl (S)-4-(1-octyloxy)benzoates, bearing either polymerisable or non-polymerisable terminal groups, are described. The synthesised liquid crystals exhibit both a chiral smectic C phase and a chiral nematic phase. The helical pitch and electro-optical properties of the new compounds were determined as a function of temperature.
  Sabrina Mormile , Giovanni De Filpo , Giuseppe Chidichimo and Fiore Pasquale Nicoletta
  Liquid crystalline materials play an important role in the synthesis of nanoparticles of well-defined shape and size; at the same time nanoparticles dispersed in liquid crystals allow investigation of defect formation in liquid crystal suspensions and enhance the light scattering properties of nematic cells. The morphology and the electro-optical properties were investigated of thin films of nematic liquid crystal/Aerosil® nanoparticle composites, in which the Aerosil® nanoparticles are interconnected by free radical polymerisation. The prepared cells are characterised by high contrast ratios, large switching electric fields, but very fast relaxation times. In addition, memory effects were observed in the samples, since Aerosil® particles tended to generate local defects in the liquid crystal after the first switching run.
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