Rapid Synthesis of Silver Nanowires and Network Structures under Cuprous Oxide Nanospheres and Application in Surface-Enhanced Raman Scattering

Crystalline silver nanowires, with diameters of 50–500 nm and lengths up to tens of micrometers, have been successfully synthesized by a simple wet chemical route by using cuprous oxide nanospheres as a reductant and directional agent. The products are characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and UV–vis absorption spectroscopy. The two-dimensional netlike nanostructure is composed of several silver nanowires. The possible mechanism for the formation of silver nanowires is discussed. It is found that the architecture of silver crystals is drastically influenced by the concentration of the precursors and the reaction temperature. The experimental results reveal that the Cu2O nanospheres might play the two roles during the growth process of silver nanowires. Except for a reducing agent, Cu2O nanospheres act as a growth substrate to induce the formation of silve...

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