Advanced Materials

Cover image for Advanced Materials

November 1991

Volume 3, Issue 11

Pages fmi–fmi, 530–571

  1. Masthead

    1. Top of page
    2. Masthead
    3. Articles
    4. Communications
    5. Research News
    1. Masthead (page fmi)

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031101

  2. Articles

    1. Top of page
    2. Masthead
    3. Articles
    4. Communications
    5. Research News
    1. Steel-based corporate diversification (pages 530–531)

      Dr. Hiroshi Nomura

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031102

      Essary: Kawasaki Steel is one of the world's largest steel producing corporations. Market pressures over the last few years have encouraged the company to diversify into the high technology sector in order to remain competitive. The Director of the company's high technology laboratories in Japan traces recent developments and outlines the aims of the company in, for example, electronics.

    2. Langmuir–Blodgett membranes for separation and sensing (pages 532–541)

      Dr. Bernd Tieke

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031103

      Review: Gas and ion sensing, for example the detection of NH3, I2, or NO2 can be achieved by incorporating compounds such as that shown in the figure into Langmuir–Blodgett (LB) films. The attraction of using LB films, in sensing, separating membranes, or as models for biological membranes, is based on their controlled thickness and high degree of molecular order. The materials, their preparation, and some of their applications are reviewed.

    3. Organometallic molecular precursors for low-temperature MOCVD of III–V semiconductors (pages 542–548)

      Dr. Francis Maury

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031104

      Review: The preparation of III–V semiconductor epitaxial layers using chemical vapor deposition (CVD) suffers the disadvantage that commonly employed precursors such as AsH3 and Ga(CH3)3 are either toxic or lead to the unwanted incorporation of carbon into the deposited layers. Alternative group-III and group-V sources, as well as single sources for the deposition of, for example, GaAs, which feature a covalent bond between the group-III and group-V elements are reviewed.

  3. Communications

    1. Top of page
    2. Masthead
    3. Articles
    4. Communications
    5. Research News
    1. Amorphous molecular materials: Synthesis and properties of a novel starburst molecule, 4,4′,4″ -Tri(N-phenothiazinyl)triphenylamine (pages 549–550)

      Akiji Higuchi, Hiroshi Inada, Tomokazu Kobata and Prof. Yasuhiko Shirota

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031105

      Communication: Processability, flexibility, transparency, and a lack of grain boundaries are some of the attractive properties of amorphous molecular materials. For their integration into electronics, however, it is important that the materials can form stable amorphous, glassy states with a glass-transition temperature and, if any, a crystallization temperature as high as possible. The starburst molecule shown in the figure has a glass-transition temperature of 141°C.

    2. A novel carbon material derived from pyridine–borane (pages 551–552)

      Dr. Ralf Riedel, Joachim Bill and Gerd Passing

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031106

      Communication: BC4N, a new carbon material containing boron and nitrogen is formed in high yield by the thermal decomposition of pyridine–borane at 1050°C in argon. X-ray powder diffraction shows hk0 and 00l reflections indicating a turbostratic structure. X-ray photoelectron spectroscopy and analytical investigation in the transmission electron microscope reveal the random distribution of B[BOND]C, B[BOND]N, and C[BOND]C bonds present in the carbon residue.

    3. The electrochromic effect in cobalt oxide thin films (pages 553–555)

      C. N. Polo da Fonseca, Prof. Marco-A. De Paoli and Dr. Annette Gorenstein

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031107

      Communication: Anodic electroprecipitation has been used to deposit thin films of cobalt oxide onto transparent, conducting glass substrates. The electrochromic effect, a reversible color change promoted by an electrochemical reaction, is demonstrated in the films making them of interest, as with WO3, V2O5 and other transition-metal oxides, for application in dynamic, optically controlled devices.

    4. Properties of amphiphilic terminally substituted conjugated nonaene- and 2-docosylnonaene carboxylic acids in monolayers at the air–water interface (pages 555–558)

      Prof. Franz Effenberger, Dr. Paul Meller, Prof. Helmut Ringsdorf and Dr. Hubert Schlosser

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031108

      Communication: Amphiphilic, conjugated polyenes, (see figure) substituted with, for example, redox-active groups such as ferrocene or other groups which allow for specific and selective excitation (energy intake), have been synthesized and their spectroscopic properties examined at the air-water interface. The materials have potential applications in the storage and transfer of information on a molecular level.

    5. Pillared randomly interstratified clay as a highly heat-stable catalytic solid (pages 558–561)

      Dr. Kazuo Urabe, Naoki Kouno, Hiroaki Sakurai and Prof. Yusuke Izumi

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031109

      Communication: Catalytic interstratified clays with a thermal stability equal to that of zeolites have recently been produced based on the unfortunately rare rectorite clay. Here, a synthetic alternative to pillared rectorite is presented, which exhibits both a higher catalytic activity and thermal stability and is based on synthetic mica–montmorillonite.

  4. Research News

    1. Top of page
    2. Masthead
    3. Articles
    4. Communications
    5. Research News
    1. Magnetically induced super resolution in a magneto-optical disk (pages 562–563)

      Dr. Masahiko Kaneko, Katsuhisa Aratani and Masumi Ohta

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031110

      Research News: A tenfold increase in the storage density of magneto-optical media could be achieved through combining the use of a short wavelength laser and the application of a new detection technique known as magnetically induced super resolution. The effective spot size of the readout laser is reduced by passing the light through a magnetically induced mask (see figure) meaning that the information can be stored closer together on the disk.

    2. Molecular materials V Part A. Molecular nonlinear optical materials—potential applications (pages 564–565)

      Dr. David E. Eaton, Dr. Gerald R. Meredith and Dr. Joel S. Miller

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031111

      Research News/Molecular Materials V Part A: The move from electronics through photronics to photonics in applications such as data transfer is discussed in terms of the need for new materials. The advantages gained through the use of photons instead of electrons in nonlinear-optical applications include the absence of cross-talk or interference due to the relatively weak interactions between photons.

    3. Molecular imaging by Raman microscopy (pages 566–568)

      Prof. David N. Batchelder, Dr. Chunwei Cheng and Dr. G. David Pitt

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031112

      Research News: Raman microscopy combines the ability to indentify molecular species in a sample and to determine the location of these species within the sample. An example of the application of the technique is shown in the figure where a plasma-deposited diamond film is imaged, the lighter areas indicating the presence of crystalline diamond. The developement of the technique and some of its applications are outlined.

    4. Sol—Gel Processes II Investigation and Application (pages 568–571)

      Dr. Hans Reuter

      Article first published online: 15 SEP 2004 | DOI: 10.1002/adma.19910031113

      Research News: The production of tailor-made ceramic materials using the solgel technique is discussed with reference to the chemistry of the starting alkoxides. In the second part of this article a view is also taken of the future requirements for applying the technique to commercial production.