标题： 银纳米板：理论与实验表征。 SERS应用研究 显示英文标题

标题： Silver Nanoplates: Theoretical and Experimental Characterization. Study of SERS Application

摘要： 金属纳米结构近年来因其独特的物理和化学性质而受到广泛关注，这些性质在各种科学和工程领域中有着广泛的实际应用。在此，我们报告了一项关于通过两步化学合成获得的银纳米板（Ag-Nplates）的光学性质及其在场增强领域的应用研究。利用光学消光光谱（OES）以及对实验光谱的详细理论分析，表征了所得悬浮液的尺寸分布、形貌和光学光谱行为。这些研究还通过透射电子显微镜（TEM）进行了形状和尺寸分布分析。两种技术均观察到这些特性与合成Ag-Nplates过程中添加的银球形纳米颗粒（Ag-Seeds）的浓度有关。Ag-Seeds数量的减少导致主要等离子体峰相对于纯Ag-Seeds悬浮液向红外方向移动，这与显示尺寸分布的Ag-Nplates尺寸增长有关，实验光谱的尺寸分布分别集中在边长范围12-15 nm和34-36 nm，其等离子体峰位置分别为543 nm（较高Ag-Seeds浓度）和815 nm（较低Ag-Seeds浓度）。成功地通过将Ag-Nplates掺入琼脂糖凝胶中，利用表面增强拉曼光谱（SERS）探测了刚果红（BB）。 显示英文摘要

摘要： Metal nanostructures have received significant attention in recent years owing to their peculiar physical and chemical properties, which span a wide range of practical applications in a variety of scientific and engineering fields. Herein, we report a study of the optical properties and application in the field enhancement of silver nanoplates (Ag-Nplates) obtained by two-step chemical synthesis. Optical Extinction Spectroscopy (OES), together with a detailed theoretical analysis of the experimental spectra, was used to characterize the size distribution, morphology, and optical spectral behavior of the obtained suspensions. These studies were complemented with shape and size distribution analyses using Transmission Electron Microscopy (TEM). It was observed by both techniques that these characteristics are related to the concentration of silver spherical nanoparticles (Ag-Seeds) added during the synthesis of Ag-Nplates. A decrease in the Ag-Seed amount produces an infrared shift of the main plasmon peak with respect to the neat Ag-Seeds suspension, which is related to the size growth of Ag-Nplates showing size distributions centered in the edge length range of 12-15 nm and 34-36 nm for the experimental spectra, whose plasmon peak positions are at 543 nm (higher Ag-Seeds concentration) and 815 nm (lower Ag-Seed concentration), respectively. The detection of Brilliant Blue (BB) by Surface-Enhanced Raman Spectroscopy (SERS) was successfully probed with the incorporation of Ag-Nplates in an agarose gel.