Journal
ADVANCED MATERIALS
Volume 17, Issue 8, Pages 971-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200401789
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Novel hierarchical heterostructures made of Si core microwires covered by dense, aligned SiO2 nanowires that form multiple junctions to the cores, have been synthesized on a large scale (see Figure). The Si wires are single crystals with a diameter of similar to 1-3 mu m, whereas the SiO2 nanowires are amorphous with a diameter of similar to 30-80 nm. The materials are envisaged as becoming important for optical fibers, low-dimensional waveguides, scanning near-field optical microscopes, and high-bandwidth optical signal processing devices.
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