Fabrication of single-crystalline plasmonic nanostructures on transparent and flexible amorphous substrates

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Abstract

A new experimental technique is developed for producing a high-performance single-crystalline Ag nanostructure on transparent and flexible amorphous substrates for use in plasmonic sensors and circuit components. This technique is based on the epitaxial growth of Ag on a (001)-oriented single-crystalline NaCl substrate, which is subsequently dissolved in ultrapure water to allow the Ag film to be transferred onto a wide range of different substrates. Focused ion beam milling is then used to create an Ag nanoarray structure consisting of 200 cuboid nanoparticles with a side length of 160 nm and sharp, precise edges. This array exhibits a strong signal and a sharp peak in plasmonic properties and Raman intensity when compared with a polycrystalline Ag nanoarray.

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Mori, T., Mori, T., Tanaka, Y., Suzaki, Y., & Yamaguchi, K. (2017). Fabrication of single-crystalline plasmonic nanostructures on transparent and flexible amorphous substrates. Scientific Reports, 7. https://doi.org/10.1038/srep42859

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