Enhanced Ultra-High Sensitivity Surface Plasmon Resonance Refractive Index Sensor Based on Black Phosphorus and Corrugated Silver Layer Structure

IF 3.3 4区 物理与天体物理 Q2 CHEMISTRY, PHYSICAL
Shaochun Fu, Wentao Jin, Longsheng Liu, Meng Song, Xiaohong Sun
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Abstract

In this study, we propose an enhanced ultra-high sensitivity prismatic surface plasmon resonance refractive index sensor. The core innovation of the sensor design lies in the integration of the two-dimensional nanomaterial black phosphorus with a corrugated silver layer. This synergistic combination significantly amplifies the interaction between the analyte and the sensing surface, thereby markedly enhancing the sensor’s performance. The influence of the corrugated silver layer and multi-layer black phosphorus on the sensing performance of the proposed sensor was analyzed using numerical simulations. By optimizing structural parameters, including the number of black phosphorus layers and the thickness and period of the corrugated silver layer, the sensor achieved ultra-high sensitivity and an exceptional figure of merit. Within the refractive index range of 1.330 RIU to 1.335 RIU, the sensor exhibited an average sensitivity of 1630°/RIU and a figure of merit of 217.333/RIU. Compared with previously reported prismatic surface plasmon resonance refractive index sensors, the proposed sensor exhibits significantly enhanced angle sensitivity. This sensor is particularly well-suited for detecting biomolecules, including the SARS-CoV-2 virus. It demonstrates substantial potential for applications in high-precision biomedical detection and medical diagnostics.

Abstract Image

基于黑磷和波纹银层结构的增强型超高灵敏度表面等离子体共振折射率传感器
在这项研究中,我们提出了一种增强型超高灵敏度棱镜表面等离子体共振折射率传感器。传感器设计的核心创新点在于将二维纳米材料黑磷与波纹银层结合在一起。这种协同组合大大增强了分析物与传感表面之间的相互作用,从而显著提高了传感器的性能。通过数值模拟分析了波纹银层和多层黑磷对拟议传感器传感性能的影响。通过优化黑磷层数、波纹银层厚度和周期等结构参数,传感器实现了超高灵敏度和优异的性能。在 1.330 RIU 至 1.335 RIU 的折射率范围内,传感器的平均灵敏度为 1630°/RIU,优越性为 217.333/RIU。与之前报道的棱镜表面等离子体共振折射率传感器相比,该传感器的角度灵敏度显著提高。这种传感器特别适用于检测生物分子,包括 SARS-CoV-2 病毒。它在高精度生物医学检测和医疗诊断方面的应用潜力巨大。
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来源期刊
Plasmonics
Plasmonics 工程技术-材料科学:综合
CiteScore
5.90
自引率
6.70%
发文量
164
审稿时长
2.1 months
期刊介绍: Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.
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