Abstract Functionalization and modification of chemical vapor deposition (CVD) growth graphene are crucial to develop new surface-enhanced Raman scattering (SERS) substrate for practical applications. In this study, a hybrid nanostructure of AgNPs@G was designed considering taking advantage of both the electromagnetic enhancement mechanism (EM) and chemical enhancement mechanism (CM) thanks to AgNPs and CVD growth graphene via a single-step fabrication. The size distribution of AgNPs with a perfect single crystalline structure obtained as 2–10 nm and uniformly decorated on CVD graphene surface. The excellent integration of AgNPs and graphene has been confirmed by TEM and XPS studies. The SERS activity of the fabricated AgNPs@G nanocomposite has been examined using Rhodamine 6G (R6G) as a probe molecule with different concentrations. The value of enhancement factor (EF) calculated as 7.2 × 104 suggests that the AgNPs@G nanostructure substrates have perfect SERS properties. The results in this paper demonstrate that the fabricated hybrid nanostructure AgNPs@G can be promising SERS substrate in many practical applications.

中文翻译：

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单步制造银纳米颗粒和 CVD 石墨烯混合纳米结构作为 SERS 基底

摘要 化学气相沉积 (CVD) 生长石墨烯的功能化和改性对于开发用于实际应用的新型表面增强拉曼散射 (SERS) 衬底至关重要。在这项研究中，由于 AgNPs 和 CVD 生长石墨烯，通过单步制造，考虑利用电磁增强机制（EM）和化学增强机制（CM），设计了 AgNPs@G 的混合纳米结构。具有完美单晶结构的 AgNPs 的尺寸分布为 2-10 nm，并均匀地装饰在 CVD 石墨烯表面。TEM 和 XPS 研究证实了 AgNPs 和石墨烯的完美结合。已经使用罗丹明 6G (R6G) 作为不同浓度的探针分子检查了制造的 AgNPs@G 纳米复合材料的 SERS 活性。计算为 7.2 × 104 的增强因子 (EF) 值表明 AgNPs@G 纳米结构衬底具有完美的 SERS 特性。本文的结果表明，所制备的混合纳米结构 AgNPs@G 在许多实际应用中是很有前景的 SERS 基底。