Chloride solutions are used to modify flower-like Ag-coated ZnO nanorod (Ag-ZnO-NR) arrays, leading to the formation of Ag-nanosphere decorated ZnO-NR arrays, which have a morphology with each sphere-like Ag nanoparticle independently lying at the top of ZnO-NR and thus can be used as a new kind of substrates for the study of surface-enhanced Raman spectroscopy (SERS). The chloride modification is dominated by Ag abnormal migration on ZnO NRs in the environment of chloride solution. The concentration of chloride ions for effective modification is higher than ∼1 × 10⁻⁴ M and the final morphology is nearly steady as the soaking time is longer than 10 min. On the modified SERS substrates, the thermalization of probing molecules during Raman measurement is substantially depressed. Using the SERS samples prepared by loading the probing molecules in the presence of chloride ions, the Raman signals are obviously enhanced with an extremely high signal-to-noise ratio. The Raman enhancement is evidenced to be due to the enhanced adsorption of probing molecules on Ag surface in the presence of chloride ions.

氯化物溶液用于修饰花状 Ag 包覆 ZnO 纳米棒 (Ag-ZnO-NR) 阵列，导致形成 Ag 纳米球装饰的 ZnO-NR 阵列，其具有每个球状 Ag 纳米颗粒独立分布的形态在 ZnO-NR 的顶部，因此可作为一种新型基底用于研究表面增强拉曼光谱 (SERS)。氯化物改性主要是在氯化物溶液环境中 ZnO NRs 上的 Ag 异常迁移。有效改性的氯离子浓度高于∼1 × 10 ^-4M 和最终形态几乎稳定，因为浸泡时间超过 10 分钟。在改进的 SERS 衬底上，在拉曼测量过程中探测分子的热化大大降低。使用在氯离子存在下加载探测分子制备的 SERS 样品，拉曼信号明显增强，具有极高的信噪比。拉曼增强被证明是由于在氯离子存在下探测分子在 Ag 表面上的吸附增强。