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首页> 外文期刊>RSC Advances >Development of ordered metal nanoparticle arrangements on solid supports by combining a green nanoparticle synthetic method and polymer templating for sensing applications
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Development of ordered metal nanoparticle arrangements on solid supports by combining a green nanoparticle synthetic method and polymer templating for sensing applications

机译：通过组合绿色纳米粒子合成方法和聚合物模板对固体载体对固体载体的有序金属纳米粒子布置的影响

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In this paper, we present a one step, simple, robust and “green” methodology to fabricate high-density ordered arrays of uniform Au nanoparticles (NPs) and Au NP clusters at room temperature over large areas which are suitable for high-performance surface enhanced Raman spectroscopy (SERS). The method is based on the template-guided self-assembly process undergone by polystyrene- b -poly(4-vinylpyridine) copolymer (PS- b -P4VP), in which gold salt is incorporated within the micellar cores (P4VP) and subsequently reduced by HEPES buffer salt in a reduction process at room temperature to give single and clustered NP arrays with hexagonal order. Sizes of P4VP domains are nearly constant ( ca. 27 nm) and contain clusters of tiny Au NPs of ca. 4 nm separated 2–3 nm each other. Moreover, the clusters can be transformed either on singly dispersed anisotropic (“nanocrescent-like”) or spherical NPs only by their exposure to O _(2) plasma. Excellent SERS performance with high signal intensities (as evidenced by high enhancement factors >8 × 10 ~(5) ) and excellent reproducibility were found for the cluster arrays. This is because of the uniform size and gap distance of the gold clusters in large areas. The anisotropic and isotropic dispersed NP metallic substrates also displayed good sensitivities but with relatively slightly lower enhancement factors ( ca. 10 ~(4) to 10 ~(5) ). All these metallic substrates can be achievable without the use of any expensive equipment or clean room processing enabling the potential obtention of low-cost and high-throughput production of chips for (bio)sensing applications.
机译：在本文中，我们展示了一种步骤，简单，鲁棒和“绿色”方法，以在室温下在适用于高性能表面的大面积的室温下制造高密度有序阵列和Au NP簇的高密度有序阵列增强的拉曼光谱（SERS）。该方法基于聚苯乙烯-B-Poly（4-乙烯基吡啶）共聚物（PS-B-B4VP）经过的模板引导的自组装过程，其中金盐掺入胶束核（P4VP）中，随后减少通过HEPES缓冲盐在室温下在还原过程中，用六边形阶提供单一和聚类的NP阵列。 P4VP结构域的大小几乎是恒定的（约27nm）并含有CA的微小Au NP的簇。 4 nm分隔2-3 nm。此外，簇可以在单独分散的各向异性（“纳入型”）或球形NPS上仅通过暴露于O _（2）等离子体而转化。具有高信号强度的优异SERS性能（如高增强因子证明> 8×10〜（5））和集群阵列的优异再现性。这是因为大区域中金簇的均匀尺寸和间隙距离。各向异性和各向同性分散的NP金属底物也显示出良好的敏感性，但增强因子相对较低（约10〜（4）至10〜（5））。所有这些金属基板都可以在不使用任何昂贵的设备或洁净室处理的情况下实现，从而实现芯片的低成本和高通量生产的潜在基础（BIO）感测应用。

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