成功制备了高度有序的阳极氧化铝模板(AAO),并在磷酸和铬酸的混合溶液中去除氧化铝层,得到表面具有规则凹坑阵列的铝片.在此铝片表面利用交流电沉积得到蓬松的纳米银结构并进行了SEM表征.利用三聚氰胺等作为探针分子对其拉曼增强效果进行了研究,并成功检测出10-12g·mL-1的三聚氰胺溶液的特征峰.通过计算在这种浓度下激光光斑下三聚氰胺的分子数仅约3.8×10-5个,已超出了单分子层检测水平;增强因子最大达到1.41×1011.%A highly ordered anodic aluminum oxide template was prepared, the mixture of phosphate and chromic acid was used to remove the oxide layer, regular pits array on the surface of the aluminum was obtained, then AC electrodeposit method was used to get fluffy nano silver structure, which was tested with SEM. Melamine was chosen as the probe molecule, the Raman peaks of melamine with 10-12 g· mL-1 were successfully detected, and the molecule number of the melamine is about 3.8 × 10-6 at this concentration and laser spot through calculation, which is beyond the detection level of monolayer. The enhancement factor reached 1.41 × 1011.
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