We report the dynamic behavior of surface-enhancement Raman scattering (SERS) spectra using rhodamine 6G dye (R6G, 10^–8 mol L^–1) adsorbed on gold nanorods (AuNRs). SERS spectra displayed a strong time-dependence intensity in wet to dry transition states. FEG-SEM images reveal a stacking of AuNRs organization that can lead to Raman signal improvements due to the formation of a 3D hot spot matrix that acts as a trap for target molecules. AuNRs nanostructured films were efficiently employed to form SERS substrates. The independent random AuNR organization in the SERS spectra exhibits a characteristic profile of intensities due to different dielectric environmental conditions. Despite the variations observed in the spectra array, a pattern was recognized by statistical analysis. Multidimensional analysis ensured the distinction of the study’s requirements applied to the SERS response, exhibiting a silhouette coefficient of 0.92 with the least-squares projection technique. Changes in the SERS spectra profile from wet to dry state conditions of R6G dye solution can be interpreted as the dynamic behavior of R6G molecules correlated to distinct molecular adsorption and (or) surface distribution of the R6G molecules proving different plasmonic resonances. Simulations obtained from BEM calculation in experimental data corroborate that the SERS enhancement is strongly dependent on the nanoparticle coupling in nanoscale and the dielectric environment.

中文翻译：

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罗丹明6G与金纳米棒相互作用的表面增强拉曼光谱的动态行为：湿与干条件下分析的意义。

我们报告了使用罗丹明6G染料（R6G，10 ^–8 mol L ^–1的表面增强拉曼散射（SERS）光谱的动态行为）吸附在金纳米棒（AuNRs）上。SERS光谱在湿态到干态转变状态下显示出很强的时间依赖性。FEG-SEM图像显示，由于形成3D热点矩阵（充当目标分子的陷阱），AuNRs组织的堆叠可导致拉曼信号改善。AuNRs纳米结构薄膜被有效地用于形成SERS基板。由于不同的介电环境条件，SERS光谱中的独立随机AuNR组织表现出强度的特征曲线。尽管在光谱阵列中观察到变化，但通过统计分析仍可识别出图案。多维分析确保了将研究要求应用于SERS响应的区别，最小二乘投影技术的轮廓系数为0.92。R6G染料溶液从湿态到干态的SERS光谱图变化可以解释为R6G分子的动态行为与R6G分子的独特分子吸附和（或）表面分布相关，从而证明了不同的等离子体共振。从实验数据中的BEM计算获得的仿真证实，SERS增强在很大程度上取决于纳米级和电介质环境中的纳米粒子耦合。