We present a comprehensive analysis of influence of probe geometry on responses based on localized surface plasmon resonance phenomenon. Accordingly, plasmonic responses corresponding to diverse geometries such as D-type and tapered probes are exclusively analyzed. Incorporating noble metal nanoparticles such as AuNPs and AgNPs towards facilitation of LSPR, these two probes are systematically investigated for detection of one common analyte; i.e., methanol. It is found that sensing performances considerably vary in tune with the probe configuration. Further, the different noble metal nanoparticles also influence the overall sensing capabilities of detecting methanol in alliance with the diverse geometries. The sensitivity in case of D-type probe for detection of methanol is found to be ∼0.09644 mV/ppm with AuNPs and ∼0.03038 mV/ppm with AgNPs. On the other hand, the sensitivity for AgNPs coated probe is found to be ∼0.00389 mV/ppm and 0.00379 mV/ppm for AuNPs in case of tapered probe. The attained results yield formidable evidence how changes in geometrical shape of probes result in considerable alteration in sensing enactment.

中文翻译：

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光纤探针几何形状对通过局部表面等离子体共振传感挥发性液体的影响

我们基于局部表面等离子体共振现象对探针几何形状对响应的影响进行了综合分析。因此，专门分析了对应于不同几何形状（如 D 型和锥形探针）的等离子体响应。结合贵金属纳米粒子如 AuNPs 和 AgNPs 来促进 LSPR，系统地研究了这两种探针以检测一种常见的分析物；即甲醇。发现传感性能随探头配置而显着变化。此外，不同的贵金属纳米颗粒也影响检测甲醇的整体传感能力与不同几何形状的结合。发现使用 D 型探针检测甲醇的灵敏度对于 AuNPs 为 ~0.09644 mV/ppm，对于 AgNPs 为 ~0.03038 mV/ppm。另一方面，发现在锥形探针的情况下，AgNPs 涂层探针的灵敏度为 ~0.00389 mV/ppm 和 AuNPs 0.00379 mV/ppm。所获得的结果产生了强大的证据，即探针几何形状的变化如何导致传感执行的显着改变。