Abstract
Nanostructured Ag thin films could be facilely prepared by soaking glass substrates in ethanolic solutions containing <TEX>$Ag_2O$</TEX> powders at an elevated temperature. The formation of zero-valent Ag was corroborated using X-ray diffraction and X-ray photoelectron spectroscopy. The deposition of Ag onto a glass substrate was readily controlled simply by changing the reaction time. Due to the aggregated structures of Ag, the surface-enhanced Raman scattering spectra of benzenethiol could be clearly identified using the Ag-coated glass. The enhancement factor at 514.5 nm excitation estimated using benzenethiol reached <TEX>$1.0{\times}10^5$</TEX> while the detection limit of rhodamine 6G was found to be as low as <TEX>$1.0{\times}10^{-13}$</TEX> M. Since this one-pot fabrication method is eco-friendly and is suitable for the mass production of diverse Ag films, it is expected to play a significant role in the development of surface plasmon-based analytical devices.
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