12.12.2019
Publikation in Nature Communications
Prof. Dr. Axel Voigt und Dr. Marco Salvalaglio aus dem Institut für Wissenschaftliches Rechnen veröffentlichen gemeinsam mit anderen Wissenschaftlern erfolgreich einen Artikel in Nature Communications mit dem Titel "Templated dewetting of single-crystal sub-millimeter-long nanowires and on-chipsilicon circuits.
Abstract:
Large-scale, defect-free, micro- and nano-circuits with controlled inter-connections representthe nexus between electronic and photonic components. However, their fabrication over largescales often requires demanding procedures that are hardly scalable. Here we synthesizearrays of parallel ultra-long (up to 0.75 mm), monocrystalline, silicon-based nano-wires andcomplex, connected circuits exploiting low-resolution etching and annealing of thin siliconfilms on insulator. Phasefield simulations reveal that crystal faceting and stabilization of thewires against breaking is due to surface energy anisotropy. Wires splitting, inter-connectionsand direction are independently managed by engineering the dewetting fronts and exploitingthe spontaneous formation of kinks.
Finally, we fabricatefield-effect transistors with state-of-the-art trans-conductance and electron mobility. Beyond thefirst experimental evidence ofcontrolled dewetting of patches featuring a record aspect ratio of ~1/60000 and self-assembled ~mm long nano-wires, our method constitutes a distinct and promising approachfor the deterministic implementation of atomically-smooth, mono-crystalline electronic andphotonic circuits.
Nature Communications volume 10, Article number: 5632 (2019)