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  • 2000-2004  (2)
  • 1980-1984  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 3934-3940 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An extended investigation of the phase separation process in polymer dispersed liquid crystals is presented. A detailed analysis of the experimental results shows that the nucleation and growth of the liquid crystal droplets from the polymeric matrix can be described as the coarsening process occurring in binary alloys. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 6060-6065 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the preparation methods and electro-optical characterization of polymer-dispersed liquid crystals with nanosized liquid crystal domains obtained by using a multifunctional monomer in a prepolymer mixture that is suitable for a fast photopolymerization process. The electric-field-induced optical phase shift has been measured using a Mach–Zender interferometer, getting values up to π/2 with an applied voltage of about 20 V/μm with no dependence on the light polarization. The high transmittance of the samples make them suitable for photonic devices and telecom applications. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 3 (1984), S. 30-43 
    ISSN: 0392-6737
    Keywords: Liquid crystals ; Optical properties and materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si riporta una breve rassegna degli studi preliminari sulle proprietà ottiche delle mesofasi liotropiche. Si presentano nuovi risultati delle misure degli indici di rifrazione per varie fasi di un sistema ternario. Particolare risaltoè dato alle proprietà ottiche delle diverse mesofasi liotropiche di tipo nematico. Infine una breve rassegna è dedicata agli effetti ottici dovuti all'applicazione di campi esterni come il campo magnetico, quello elettrico e quello meccanico.
    Abstract: Резюме Предлагается краткий обзор проведенных исследований оптических свойств лиотропных мезофаз. Приводятся новые результаты измерений показа телей преломления в различных фазах трехкомпонентной системы. Особое внимание уделяется оптическим свойствам различных лиотропных нематических мезофаз. В заключение обсуждаются оптические эффекты, связанные с внешними полями: магнитными, электрическими и механическими.
    Notes: Summary A brief review of early studies of optical properties of lyotropic mesophases is presented. New results about refractive-index measurements in various phases of a ternary system are shown. Emphasis is given to the optical properties of the different lyotropic nematic mesophases. Finally a short review is then devoted to the optical effects of external applied fields such as magnetic, electric and mechanical ones.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 1 (1982), S. 607-614 
    ISSN: 0392-6737
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si riportano i risultati di misure accoppiate di capacità e di riflessione selettiva compiute su una miscela colesterica sottoposta ad un campo elettrico statico orientato parallelamente all'asse dell'elica. Si trova una ben definita sequenza dell'insorgere delle diverse deformazioni se lo spessore del campione è molto piú grande del passo dell'elica. Tre distinte soglie sono misurate per spessori compresi tra 6 μm e 100 μm.
    Abstract: Резюме Мы приводим результаты связанных измерений емкости и селективного оптического отражения, проведенных на холестеричной смеси, помещенной в статическое злектрическое поле, параллельно спиральной оси. Получается определенная иерархия для появления различных деформаций, если толщина образца много больше, чем винтовой шаг. ъыли обнаружены три резко выраженных порога для толщин образцов в диапазоне 6 μm≤d≤100 μm.
    Notes: Summary We report results of coupled capacitance and optical measurements made on a cholesteric mixture submitted to a d.c. electric field parallel to the helical axis. A definite hierarchy for the onset of different deformations is found if the sample thickness is much larger than the helical pitch. Three distinct thresholds are measured for sample thickness in the range 6 μm≤d≤100 μm.
    Type of Medium: Electronic Resource
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