A simple approach combining electrochemical reaction self-assembly and photolithography has been proposed for the controlled and reproducible fabricating the highly ordered Au-Ag alloy arrays for SERS. The nucleation and growth processes of the Au-Ag alloy are adjusted easily via changing the applied voltage and reaction time to obtain the flower-like hierarchy nanostructure, which show the strongest SERS properties due to the wealthy Raman “hot spots” provided by the corners and edges in much-branched flower structure. Moreover, the maximum SERS is observed for the Au-Ag alloy with a small amount of Au (12%), which can lead to a charge separation and favor the probe molecules adsorption to the silver domains. By using these flower-like Au-Ag alloy arrays, the Rhodamine 6G (R6G) with the concentration of as low as 10⁻¹²M can be detected easily in this study, which would be very promising for the applications in biosensors and nanodevices with molecule-level detection.

已经提出了一种将电化学反应自组装和光刻技术相结合的简单方法，用于可控和可重复地制造用于SERS的高度有序的Au-Ag合金阵列。通过改变施加的电压和反应时间，可以容易地调节Au-Ag合金的成核和生长过程，以获得花状的层状纳米结构，由于角提供了丰富的拉曼“热点”，因此其显示出最强的SERS性能。和分支状的花结构中的边缘。此外，对于少量Au（12％）的Au-Ag合金，观察到最大SERS，这可能导致电荷分离并有利于探针分子吸附到银域。通过使用这些花状的Au-Ag合金阵列，罗丹明6G（R6G）的浓度可低至10 ^-12在这项研究中可以很容易地检测到M，这对于分子水平检测在生物传感器和纳米设备中的应用将是非常有前途的。