Volume 3 Issue 7, July 2004

Volume 3 Issue 7

50-μm-wide rotor blades from a micro gas turbine engine

Cover design by Karen Moore, image by Felice Frankel




Research News

News and Views

  • News & Views |

    High-temperature superconductors could revolutionize the electrical power industry. New work shows how the introduction of BaZrO3 nanoparticles during growth leads to a dramatic increase of the critical current in the 'second generation' superconductor YBa2Cu3O7.

    • David Christen
  • News & Views |

    Nanocrystal quantum dots are excellent emitters of light, but energizing that emission electrically has proved difficult. A newly discovered non-radiative energy-transfer process that allows electron–hole pairs to be generated in quantum wells, and then transferred into quantum dots, could lead to a new generation of ultra-high-efficiency light sources for use at scales ranging from nano-optics to a city block.

    • Mark Stockman
  • News & Views |

    The interaction of twin walls with defects influences many of the properties of ferroelectric and superconducting materials. A breakthrough in experimental methods allows the direct determination of twin-wall widths for the first time.

    • E. K. H. Salje
    •  & W. T. Lee
  • News & Views |

    The use of direct laser photolithography for creating complex three-dimensional structures in photocurable polymer resist has great potential for the construction of micromechanical and photonic devices. A new study pushes this technique towards its limits to explore just how far its potential might reach.

    • Jean-Michel Lourtioz
  • Materials Witness