Advanced Materials

Cover image for Advanced Materials

March 1990

Volume 2, Issue 3

Pages fmi–fmi, 121–158

  1. Masthead

    1. Top of page
    2. Masthead
    3. Editorial Essay
    4. Reviews
    5. Communications
    6. Research News
    7. Conference Reports
    8. Book Review
    1. Masthead (page fmi)

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020301

  2. Editorial Essay

    1. Top of page
    2. Masthead
    3. Editorial Essay
    4. Reviews
    5. Communications
    6. Research News
    7. Conference Reports
    8. Book Review
    1. You have free access to this content
      Interdisciplinary research centres—centres of excellence or contention? (pages 121–122)

      Prof. Bruce A. Joyce

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020302

      British interdisciplinary research efforts have been further organized in the last few years by the founding of IRCs. The aims of these centres, the way they are awarded, funded, and managed is a topic of some debate. In this month's Editorial Essay, the Director of the IRC for Semiconductor Materials in London assesses the current position and the future of this approach.

  3. Reviews

    1. Top of page
    2. Masthead
    3. Editorial Essay
    4. Reviews
    5. Communications
    6. Research News
    7. Conference Reports
    8. Book Review
    1. X-ray techniques using synchrotron radiation in materials analysis (pages 123–131)

      Prof. Bruno Lengeler

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020303

      The wider availability of synchrotron sources had led to both the development of new analytical X-ray techniques and the improvement of others, for example, X-ray diffraction, absorption, topography, and photoemission. The figure shown the result of diffraction studies on a stack of 10 epitaxial double layers of GaAs and Ga0,91 In0.09As. Information on the lattice mismatch, periodicity, composition and interface roughness of the epitaxial layers can be obtained.

    2. Electroceramics: Characterization by Impedance Spectroscopy (pages 132–138)

      Dr. John T. S. Irvine, Dr. Derek C. Sinclair and Prof. Anthony R. West

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020304

      Inhomogeneities in ceramic electrolytes, electrode/electrolyte interfaces, surface layers on glasses, ferroelectricity, and even ferrimagnetism can be probed using impedance spectroscopy, a powerful technique for the study of electroceramics. The information obtained can be used to control the properties of many materials.

  4. Communications

    1. Top of page
    2. Masthead
    3. Editorial Essay
    4. Reviews
    5. Communications
    6. Research News
    7. Conference Reports
    8. Book Review
    1. Ferroelectric liquid crystal with extreme polarization: X-Ray structure analysis of the crystalline phase (pages 139–141)

      Dr. Howard M. Colquhoun, Dr. Christopher C. Dudman, Dr. Gareth C. Robinson, Caroline A. O'Mahoney and Dr. David J. Williams

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020305

      Ciral liquid crystalline compounds which adopt the Smath image phase are of interest as they can possess a spontaneous, permanent and macroscopic dipole moment (ferroelectric polarization) even in the absence of external fields. The compound reported here (see figure) has the highest known spontaneous polarization (520 nC cm−2) and therefore could improve the switching speeds of electro-optic devices substantially.

      • equation image
    2. Induction and variation of discotic columnar phases through doping with electron acceptors (pages 141–144)

      Prof. Helmut Ringsdorf, Holger Bengs, Olaf Karthaus, Renate Wüstefeld, Martina Ebert, Prof. Joachim H. Wendorff, Dr. Bernd Kohne and Prof. Klaus Praefcke

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020306

      Low molecular weight liquid crystals with in-build charge transfer (CT) properties have been generated from both liquid crystalline (LC) and non-LC disc-like compounds by doping these electron rich species with electron acceptors e.g. TNF. The influence of CT interactions on the columnar phases formed are assessed and the phase behavior of the columnar systems with varying acceptor contents reported.

  5. Research News

    1. Top of page
    2. Masthead
    3. Editorial Essay
    4. Reviews
    5. Communications
    6. Research News
    7. Conference Reports
    8. Book Review
    1. Dielectric spectroscopy: Fashionable again (pages 145–147)

      Dr. Friedrich Kremer, Sven U. Vallerien and Dr. Rudolf Zentel

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020307

      The molecular dynamics of polymers and liquid crystals (see figure) affect the properties of these materials. The different modes of, for example, relaxation can be studied to great effect using a modern version of an old spectroscopic method—dielectric spectroscopy—which makes use of molecular dipoles to gain an insight into these processes.

      • equation image
    2. Inorganic materials II. Glass-ceramics with controlled dielectric properties (pages 147–150)

      Graham Partridge

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020308

      The applications of glass-ceramics in the electronics industry in just one of the topics covered in the second article of our series on inorganic materials. The advantages and disadvantages of this type of material compared with others are examined.

    3. Liquid crystals consisting of simple polyene schiff bases (pages 150–151)

      Dr. Jacques Malthête

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020309

      Schiff bases which have LC-phases and could act as models for conjugated polyenes involved in the process of vision have recently been reported by Wann and Harbison of the State University of New York. The relationship of these new materials to other liquid crystalline compounds is explained.

  6. Conference Reports

    1. Top of page
    2. Masthead
    3. Editorial Essay
    4. Reviews
    5. Communications
    6. Research News
    7. Conference Reports
    8. Book Review
    1. Eurogel 1989 in colmar (pages 151–152)

      Dr. Hans Roggendorf

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020310

      Lothar Kador reports in detail on his visit to an international symposium on optical memory in the East, and Hans Roggendorf describes proceedings at the Eurogel meeting held recently in France.

    2. Optical memory in Japan (pages 152–155)

      Dr. Lothar Kador

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020311

    3. Materials Forum (pages 156–157)

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19900020312

  7. Book Review

    1. Top of page
    2. Masthead
    3. Editorial Essay
    4. Reviews
    5. Communications
    6. Research News
    7. Conference Reports
    8. Book Review

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