Abstract
We developed a breakthrough method for preparing metallic nanostructures using a self-assembled NaCl nanosized sacrificial crystal and applied it to (i) transparent flexible electrodes and (ii) as catalysts for Si nanorod fabrication. Au nanostructures fabricated using the NaCl sacrificial crystal on a polyethylene terephthalate substrate showed low resistance (40 Ω/sq), relatively high transmittance (73%), and excellent mechanical stability. Wet chemical etching of Si with Ag nanostructures formed on a Si(100) substrate using the NaCl sacrificial crystal produced uniform vertical Si microrods with a thickness of 1–2 μm and length of about 3–4 μm. These Si microrods showed high light absorption (over 90%) in the wavelength range of 350–800 nm, and various applications in optoelectronic devices are expected in the future.
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