Using the previously introduced modified discrete dipole approximation (DDA) method by applying the full details of the nanoparticle and its surrounding environment, the detection sensitivity of molecules by plasmonic Rod-based nanosensors, including U-shaped and Rod-shaped structures, was investigated. In the calculations, the two factors of the magnitude of the wavelength shift and the ability to distinguish molecules with similar properties were of significant interest. The results indicated that the sensitivity of Rod-based nanostructures is significantly higher than that of spherical nanoparticles. Among the plasmonic Rod-based nanosensors, the silver U-shaped structure performs better than others. The wavelength shift of the absorption spectrum of different nanosensors for a given molecule was very different, making it possible to detect very similar molecules from each other by testing different sensors.

中文翻译：

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使用改进的离散偶极子近似方法对基于杆的等离子体结构传感进行综合研究

利用先前介绍的改进的离散偶极近似（DDA）方法，通过应用纳米颗粒及其周围环境的全部细节，研究了基于等离子体棒的纳米传感器（包括U形和棒形结构）的分子检测灵敏度。在计算中，波长偏移的幅度和区分具有相似性质的分子的能力这两个因素是非常重要的。结果表明，棒基纳米结构的灵敏度明显高于球形纳米粒子。在基于等离子体棒的纳米传感器中，银U形结构的性能优于其他结构。对于给定分子，不同纳米传感器的吸收光谱的波长变化非常不同，使得通过测试不同的传感器来检测彼此非常相似的分子成为可能。