Chunfeng Shen, Kaihua Wu, Jingcheng Zhang, Yan Guo
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引用次数: 0
摘要
由于在多个领域的重要应用,基于表面等离子体共振(SPR)技术的温度传感器研究正受到越来越多的关注。因此,本文提出并研究了一种基于 SPR 技术的温度传感器,它由聚二甲基硅氧烷(PDMS)和二氧化钛(TiO2)组成双层银结构的温度敏感材料。作为一种热光学系数较高的固体介质,聚二甲基硅氧烷能显著提高传感器的温度灵敏度。通过调整 TiO2-Ag-TiO2-Ag-PDMS 传感结构各层的厚度,可以获得结构的最佳厚度组合。两层银之间 TiO2 层的厚度和 PDMS 层的厚度可以调整共振角的位置。在 PDMS 层上添加单层 WS2 可以进一步提高灵敏度。当 632.8 纳米单色光入射时,该结构在 275-360 K 和 321-360 K 范围内的最大灵敏度分别为 - 0.094°/K(空气)和 - 0.129°/K(乙醇),在 310-340 K 范围内保持高线性。所提出的传感器结构在感温领域表现出卓越的灵敏度和优点。
Polydimethylsiloxane-Assisted Surface Plasmon Resonance–Based Temperature Sensor
Since the important applications in multiple fields, research on temperature sensors based on surface plasmon resonance (SPR) technology is receiving increasing attention. Therefore, a SPR-based temperature sensor consisting of temperature-sensitive material of polydimethylsiloxane (PDMS) and titanium dioxide (TiO2) forming a bi-layer silver structure has been proposed and investigated in this work. As a solid medium with a high thermo-optic coefficient, the PDMS can significantly improve the temperature sensitivity of the sensor. By adjusting the thickness of each layer of the TiO2-Ag-TiO2-Ag-PDMS sensing structure, the optimal thickness combination of the structure can be obtained. The thickness of the TiO2 layer between two silver layers and the thickness of the PDMS layer can adjust the position of the resonance angle. Adding a monolayer of WS2 upon the PDMS layer can further improve the sensitivity. With an incident with monochromatic light at 632.8 nm, the maximum sensitivity of the structure in the range of 275–360 K and 321–360 K is − 0.094°/K (air) and − 0.129°/K (ethanol), respectively, maintaining high linearity in the range of 310–340 K. The temperature sensitivity also remains high linearity at wavelengths of 620 nm and 680 nm. The proposed sensor structure exhibits excellent sensitivity and figures of merit in the field of sensing temperature.
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.