通过电沉积方法在铜箔上制备了泡沫铜,将该泡沫铜放入AgNO3溶液中沉积银铜枝晶.采用扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)对枝晶形貌、元素及相组成做了分析,并研究了枝晶的表面增强拉曼散射(SERS).研究表明:沉积电流密度和铜离子浓度都会显著影响银铜枝晶的生长,随着电流密度的增加,二次枝晶长度增加.当电流密度超过1.5A/cm2时,电流密度的增大会抑制二次枝晶的生长,随着电解液中铜离子浓度的增加,二次枝晶长大,当铜离子浓度超过0.2mol/L时,二次枝晶的生长会受到抑制,且发生粗化.与铜箔相比,银铜枝晶有更好的SERS效应,同一银铜枝晶薄膜不同点处的SERS强度明显不同.
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