Optimizing Gas Sensor Performance Using Bilayer Surface Plasmon System

IF 3.3 4区 物理与天体物理 Q2 CHEMISTRY, PHYSICAL
Albania Urriola, Paolo Leonelli, Héctor Miranda, Alfredo Campos
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引用次数: 0

Abstract

The sensitivity of a gold-silver bilayer system for gas detection was investigated using angle-fixed reflectance measurements and numerical calculations based on the transfer-matrix method. Two configurations of bilayer systems were analyzed: gold on silver and silver on gold. According to calculations, the best sensitivity values were achieved with a total thickness of approximately 55 nm for the gold on silver system and approximately 65 nm for the silver on gold system. These calculations were supported by experimental results in a Kretschmann configuration for ethanol gas sensing. The bilayer systems showed a huge advantage compared to the widely used single gold thin film; however, special attention should be paid to the silver on gold configuration, as corrosion plays an important role in decreasing sensitivity.

Abstract Image

利用双层表面等离子体系统优化气体传感器性能
利用角度固定反射测量和基于转移矩阵法的数值计算,研究了金银双层系统对气体检测的灵敏度。分析了金银双层系统的两种结构:金银双层和金银双层。根据计算结果,银上金系统的总厚度约为 55 nm,金上银系统的总厚度约为 65 nm,可达到最佳灵敏度值。这些计算结果得到了用于乙醇气体传感的 Kretschmann 配置的实验结果的支持。与广泛使用的单层金薄膜相比,双层系统显示出巨大的优势;然而,应特别注意金银配置,因为腐蚀在降低灵敏度方面起着重要作用。
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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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