Metal foils: A simple electroless liquid‐phase deposition technique gives access to freestanding copper foils and supported copper thin films. The films can be easily structured into conducting line patterns for electronics applications (see picture).
Amorphous oxide thin films with tailored functionality will be crucial for the next generation of micro-electro-mechanical-systems (MEMS). Due to potentially favorable electronic and catalytic properties, amorphous bismuth ruthenate thin films might be applied in this regard. We report on the deposition of amorphous bismuth ruthenate thin films by spray pyrolysis, their crystallization behavior and electrical conductivity. At room temperature the 200 nm thin amorphous films exhibit a high electrical conductivity of 7.7 × 10(4) S m(-1), which was found to be slightly thermally activated (E(a) = 4.1 × 10(-3) eV). It follows that a long-range order of the RuO(6) octahedra is no precondition for the electrical conductivity of Bi(3)Ru(3)O(11). Upon heating to the temperature range between 490 °C and 580 °C the initially amorphous films crystallize rapidly. Simultaneously, a transition from a dense and continuous film to isolated Bi(3)Ru(3)O(11) particles on the substrate takes place. Solid-state agglomeration is proposed as the mechanism responsible for disintegration. The area specific resistance of Bi(3)Ru(3)O(11) particles contacted by Pt paste on gadolinia doped ceria electrolyte pellets was found to be 7 Ω cm(2) at 607 °C in air. Amorphous bismuth ruthenate thin films are proposed for application in electrochemical devices operating at low temperatures, where a high electrical conductivity is required.
Metallfolien: Eine einfache stromlose Flüssigphasenabscheidung ermöglicht die Herstellung von freistehenden Kupferfolien und Kupferdünnfilmen auf Polymersubstraten. Letztere können in wenigen Schritten in Leiterbahnmuster für elektronische Anwendungen strukturiert werden (siehe Bild).
The liquid‐phase preparation of copper, either as freestanding submicrometer‐thin foil or supported on a substrate, is presented by M. Niederberger et al. in their Communication on A solution of copper acetylacetonate initially forms a mirror on the reaction container wall, which then delaminates. When the copper is supported on a flexible substrate, such as Kapton, it can be structured into conduction line patterns.
Die Synthese von Kupfer in flüssiger Phase, als freistehende submikrometerdünne Folie oder auf einem Substrat, wird von M. Niederberger et al. in der Zuschrift auf vorgestellt. Eine Lösung von Kupferacetylacetonat bildet zunächst einen Spiegel auf der Wand des Reaktionsgefäßes, der anschließend abblättert. Wenn das Kupfer auf ein flexibles Substrat wie Kapton aufgebracht wird, kann es in Leiterbahnenmuster strukturiert werden.
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