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首页> 外文期刊>Nanomaterials >Simple, Low-Cost Fabrication of Highly Uniform and Reproducible SERS Substrates Composed of Ag–Pt Nanoparticles
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Simple, Low-Cost Fabrication of Highly Uniform and Reproducible SERS Substrates Composed of Ag–Pt Nanoparticles

机译：由Ag-Pt纳米颗粒组成的高度均匀且可重现的SERS基质的简单，低成本制造

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摘要

Ag–Pt nanoparticles, grafted on Ge wafer, were synthesized by the galvanic replacement reaction based on their different potentials. Detailed characterization through scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS) and X-ray photo-elelctron spectroscopy (XPS) proved that Ag–Pt nanoparticles are composed of large Ag nanoparticles and many small Pt nanoparticles instead of an Ag–Pt alloy. When applied as surface-enhanced Raman scattering (SERS) substrates to detect Rhodamine 6G (1 × 10 ?8 M) or Crystal violet (1 × 10 ?7 M) aqueous solution in the line mapping mode, all of the obtained relative standard deviation (RSD) values of the major characteristic peak intensities, calculated from the SERS spectra of 100 serial spots, were less than 10%. The fabrication process of the SERS substrate has excellent uniformity and reproducibility and is simple, low-cost and time-saving, which will benefit studies on the platinum-catalyzed reaction mechanisms in situ and widen the practical application of SERS.
机译：Ag-Pt纳米颗粒接枝到Ge晶片上，根据它们的不同电势通过电流置换反应合成。通过扫描电子显微镜（SEM），能量色散X射线能谱（EDS）和X射线光电子能谱（XPS）进行的详细表征证明，Ag–Pt纳米粒子由大的Ag纳米粒子和许多小的Pt纳米粒子组成，而不是Ag-Pt合金。当以表面增强拉曼散射（SERS）基板的形式以线图模式检测罗丹明6G（1×10？8 M）或结晶紫（1×10？7 M）水溶液时，所有获得的相对标准偏差由100个连续斑点的SERS光谱计算得出的主要特征峰强度的（RSD）值小于10％。 SERS基底的制备工艺具有均一性和可重复性极佳，简单，低成本，省时的优点，将有利于原位铂催化反应机理的研究，拓宽了SERS的实际应用范围。

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