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首页> 外文期刊>Advanced Functional Materials >Silver Nanoparticle Impregnated Polycarbonate Substrates for Surface Enhanced Raman Spectroscopy
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Silver Nanoparticle Impregnated Polycarbonate Substrates for Surface Enhanced Raman Spectroscopy

机译：用于表面增强拉曼光谱的银纳米粒子浸渍的聚碳酸酯基底

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摘要

The embedding of nanoscopic metal structures into polymeric matrices represents a convenient way to stabilise a controlled dispersion of protected nanoparticles whilst taking advantage of their physical characteristics. Supercritical carbon dioxide (scCO_2) has been used to produce silver nanoparticles in optically transparent polycarbonate (PC) matrices allowing fine scale dispersions of particles to be produced within a prefabricated polymer component. Characterization of these nanocomposites has been performed using transmission electron microscopy (TEM) and UV-vis spectroscopy. The substrates give excellent responses in surface-enhanced Raman spectroscopy (SERS) for both 4-aminothiophenol and rhodamine 6G target molecules. They offer significant benefits over more conventional SERS substrates in that they are cheap, flexible, mechanically robust and temporally stable. Post-processing the films via simple etching techniques, provides an additional degree of design control and the potential to fabricate devices with unique excitation and detection geometries for a wide range of applications.
机译：将纳米金属结构嵌入聚合物基体代表了一种方便的方法，可在利用受保护的纳米粒子物理特性的同时稳定其受控分散。超临界二氧化碳（scCO_2）已用于在光学透明的聚碳酸酯（PC）基质中生产银纳米颗粒，从而可以在预制的聚合物组件中生成颗粒的细小分散体。这些纳米复合材料的表征已使用透射电子显微镜（TEM）和紫外可见光谱进行。底物在表面增强拉曼光谱（SERS）中对4-氨基硫酚和若丹明6G目标分子均具有出色的响应。它们比更常规的SERS基材具有显着的优势，因为它们便宜，灵活，机械坚固且在时间上稳定。通过简单的蚀刻技术对薄膜进行后处理，可以提供更高程度的设计控制，并具有制造具有独特激发和检测几何形状的器件的潜力，从而可用于广泛的应用。

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