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Showing 1–9 of 9 results
Advanced filters: Author: Ralph Spolenak Clear advanced filters

  • Quasicrystals are typically stiff and hard, but also brittle in bulk form at room temperature. Here, authors observe ductile behaviour in quasicrystalline pillars of submicron diameter and provide evidence for dislocation-based plasticity at intermediate length scales and room temperature as an explanation.

    • Yu Zou
    • Pawel Kuczera
    • Ralph Spolenak
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-7

  • Refractory high-entropy alloys show promising mechanical properties at elevated temperatures, but are generally brittle at room temperature. Here, the authors observe an improved ductility and yield strength in high-entropy alloy micropillars consisting of nanometre-sized grains that also exhibit excellent thermal stability.

    • Yu Zou
    • Huan Ma
    • Ralph Spolenak
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-8

  • In this paper, we introduce a new paradigm to design scalable disordered metamaterials. We show that the localized crystallization of a semiconductor at a metal/semiconductor interface can be used as design parameter to control light interaction in such a disordered system. Here, such thermally induced crystallization, also called metal-induced crystallization, generates new zero-index states corresponding to a hybrid resonant mode emerging from selective coupling of light to the angstrom-sized crystalline shell of the semiconductor.

    • Henning Galinski
    • Andreas Wyss
    • Ralph Spolenak
    ResearchOpen Access
    NPG Asia Materials
    Volume: 11, P: 1-9

  • Inkfree multi-material printing is a common challenge in 3D printing. Here, the authors introduce electrohydrodynamic redox printing, a method that enables the deposition of multiple metals and their alloys with nanoscale resolution and thus the synthesis of materials with locally tuned properties.

    • Alain Reiser
    • Marcus Lindén
    • Ralph Spolenak
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-8

  • Heterogeneous composite materials, which are potentially useful for flexible electronics, are widespread in nature but synthetic examples are rare. Here, a site-specific hierarchical approach is used to fabricate composites with extreme local variations in elastic modulus and which are reversibly stretchable.

    • Rafael Libanori
    • Randall M. Erb
    • André R. Studart
    Research
    Nature Communications
    Volume: 3, P: 1-9

  • Silicon is thought to be brittle, which limits its mechanical application in devices. Here, the authors lithographically fabricate silicon and show its superior surface quality leads to near ideal strength and micron-scale plasticity.

    • Ming Chen
    • Laszlo Pethö
    • Jeffrey M. Wheeler
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-10