Nanoscale Electrodes

Nanoscale Electrodes are, as the name suggests, electrodes measuring between 1 and 100nanometers.

  • A Nano-Roundabout for Light

    Functional principle of a nano-roundabout.  © TU Wien

    At TU Wien, it was possible to create a nanoscale optical element that regulates the flow of light particles at the intersection of two glass fibers like a roundabout. A single atom was used to control the light paths. Just like in normal road traffic, crossings are indispensable in optical signal processing. In order to avoid collisions, a clear traffic rule is required. A new method has now been developed at TU Wien to provide such a rule for light signals. For this purpose, the two glass fibers were coupled at their intersection point to an optical resonator, in which the light circulates and behaves as in a roundabout. The direction of circulation is defined by a single atom coupled to the resonator. The atom also ensures that the light always leaves the roundabout at the next exit. This rule is still valid even if the light consists merely of individual photons. Such a roundabout will consequently be installed in integrated optical chips – an important step for optical signal processing.

  • Computers Made of Genetic Material? - ZDR researchers conduct electricity using DNA-based nanowires

    Scientists at Helmholtz-Zentrum Dresden-Rossendorf conducted electricity through DNA-based nanowires by placing gold-plated nanoparticles on them.

    Tinier than the AIDS virus – that is currently the circumference of the smallest transistors. The industry has shrunk the central elements of their computer chips to fourteen nanometers in the last sixty years. Conventional methods, however, are hitting physical boundaries. An alternative could be the self-organization of complex components from molecules and atoms. Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) and Paderborn University have now made an important advance: the physicists conducted a current through gold-plated nanowires, which independently assembled themselves from single DNA strands. Their results have been published in the scientific journal Langmuir.

  • Elektrochemische Konzentrationsbestimmung von roten Blutkörperchen

    Elektrochemische Konzentrationsbestimmung von roten Blutkörperchen | Methode zur Kontrolle der Konzentration von roten Blutkörperchen Abbildung: Wiley-VCH

    Statt die roten Blutkörperchen wie üblich unter dem Mikroskop zu zählen, wurde ein elektrochemischer Ansatz entwickelt mit dessen Hilfe sowohl die Konzentration, als auch die Peroxidaseaktivität von Erythrozyten ermittelt werden kann.

  • Nanotechnology for energy materials: Electrodes like leaf veins

    SEM – model of a metallic nano-network with periodic arrangement ( left) and visual representation of a fractal pattern (right). Credit: M. Giersig/HZB

    Nano-sized metallic wires are attracting increasing attention as conductive elements for manufacturing transparent electrodes, which are employed in solar cells and touch screen panels. In addition to high electric conductivity, excellent optical transmittance is one of the important parameters for an electrode in photovoltaic applications.

  • Nanowires as Sensors in New Type of Atomic Force Microscope

    A nanowire sensor measures size and direction of forces. University of Basel, Department of Physics

    A new type of atomic force microscope (AFM) uses nanowires as tiny sensors. Unlike standard AFM, the device with a nanowire sensor enables measurements of both the size and direction of forces. Physicists at the University of Basel and at the EPF Lausanne have described these results in the recent issue of Nature Nanotechnology.

  • The link between nanostructured electrode materials and Samsung’s debacle

    Schematic of lithium-air battery charge and discharge cycles.

    As recently has been announced, the South Korean multinational electronics company SΛMSUNG had to recall its flagship Galaxy Note 7 smartphone with the reason that battery problems cause the “explosion” of the phones during or after charging.
    In regard to the recent events, the German news site heise online published an interview with battery researcher Bai-Xiang Xu from the Technical University Darmstadt in which she explains the technical background of the Note 7 debacle.

  • 通过受控膨胀制造柔性电子

    柔性电子产品由于其惊人的应用近年吸引了相当多的关注。电极对通常作为柔性电子装置的基本组成部分。缩短电极对空间已被证明是提高性能及降低功耗的有效方法。高效地大面积生产纳米间隔的柔性基板,仍然是很大挑战。