Electrodeposition of High Density Silver Nanosheets with Controllable Morphologies Served as Effective and Reproducible SERS Substrates

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• 作者：Yiqing Xia ; Yunwen Wu ; Tao Hang ; Jiaming Chang ; Ming Li
• 刊名：Langmuir
• 出版年：2016
• 出版时间：April 12, 2016
• 年：2016
• 卷：32
• 期：14
• 页码：3385-3392
• 全文大小：736K
• 年卷期：0
• ISSN：1520-5827

文摘

Silver nanosheets with a nanogap smaller than 10 nm and high reproducibility were constructed through simple and environmentally friendly electrodeposition method on copper plate. The sizes of the nanogaps can be varied from around 7 to 150 nm by adjusting the deposition time and current density. The nanosheets with different nanogaps exhibited varied surface-enhanced Raman scattering (SERS) properties due to electromagnetic mechanism (EM). The optimized high density silver nanosheets with a nanogap smaller than 10 nm showed effective SERS ability with an enhanced factor as high as 2.0 × 10⁵. Furthermore, the formation mechanism of the nanosheets during the electrodeposition process has been investigated by discussing the influence of boric acid and current density. This method has proved to be applicable on different metal substrates, which exhibits the potential to be widely used in different fields.