【摘要】 通过湿法化学合成基于SiO₂胶体晶体的大面积有序Au/Ag纳米碗（Au/AgNB）阵列。首先，在玻璃基板上组装3D SiO₂胶体晶体作为模板。然后，以Au纳米颗粒（AuNP）为种子，通过原位生长法在SiO₂模板上沉积一层Au纳米壳（AuNS）。再通过HCHO还原Ag+成Ag0，进一步在AuNS表面沉积Ag纳米壳，形成Ag/Au双纳米壳（Ag/AuNS）阵列。最后通过丙烯酸酯改性双向取向聚丙烯（BOPP）膜方便地获得了单层有序反转Ag/AuNB阵列。这种有序Au/AgNB阵列具有更佳的表面增强拉曼散射（SERS）活性，其SERS分析增强因子（AEF）可达2.23×10⁷。更多还原

【Abstract】 Herein, we present a novel and simple method to fabricate a large-area ordered Au/Ag nanobowl（Au/AgNB）array based on SiO2colloidal crystals by wet chemosynthesis. The arrays combine the advantages of gold and silver and have been well recognized as excellent surface-enhanced Raman scattering（SERS） substrates in practical application. First of all, a 3D SiO₂colloidal crystal was arrayed on the glass substrate as a template. Then, a layer of Au nanoshell（AuNS） was deposited on the 3D SiO₂template by in-situ growth method with the help of Au nanoparticle（AuNP） seeds. Afterward, silver nanoshells were further deposited on the surface of AuNS by HCHO-reduced Ag+,then Ag/Au double nanoshell（Ag/AuNS） array was formed. A monolayer-ordered reversed Ag/AuNB array was conveniently obtained by an acrylic ester-modified biaxial-oriented polypropylene（BOPP）. The ordered Au/AgNB array with adjustable periodic holes, shapes, and sizes could be obtained when the SiO₂core was etched by HF solution.With prominent stability and reproducibility, the SERS analytical enhancement factor（AEF） of this ordered Au/AgNB array could reach 2.23×10⁷, which shows high SERS-enhancing activity and can be used as a universal SERS substrate.更多还原