Abstract—

Measurements of optical parameters of media by surface plasmon spectroscopy have a number of advantages: possibility of real-time monitoring, label-free operation, accuracy, and high sensitivity. In addition, surface plasmon spectroscopy is a universal method, used in sensor applications (e.g., biosensors and sensors for volatiles and solutes). This method is especially efficient for detecting trace amounts of materials in gas and liquid media. Its sensitivity is sufficient for measuring the refractive index of a medium with an error of 10^–6. Using nanostructured surfaces, one can improve sensitivity to 10^–9. In this study, we expanded the possibilities of plasmon spectroscopy (which made it possible to measure impurity concentrations as low as 10^–13 mol/L) and described the mechanisms and dynamics of modification of metal–aqueous solution interface (electrical double layer (EDL)). The measurement results for phthalocyanine solutions with concentrations of 10^–9 and 10^–13 mol/L are reported.

中文翻译：

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极低浓度金属与水溶液之间界面处的表面等离激元激发的特定特征

摘要-

通过表面等离子体激元光谱法测量介质的光学参数具有许多优点：实时监控的可能性，无标签操作，准确性和高灵敏度。另外，表面等离子体激元光谱法是一种通用方法，用于传感器应用中（例如，生物传感器以及挥发物和溶质的传感器）。该方法对于检测气体和液体介质中的痕量物质特别有效。它的灵敏度足以测量误差为10 ^–6的介质的折射率。使用纳米结构的表面，可以将灵敏度提高到10 ^–9。在这项研究中，我们扩展了等离子体光谱的可能性（这使得测量低至10 ^–13的杂质浓度成为可能摩尔/升），并描述了金属-水溶液界面（双电层（EDL））改性的机理和动力学。报告了浓度为10 ^–9和10 ^–13 mol / L的酞菁溶液的测量结果。