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引用次数: 0
摘要
本研究以混合复合纳米结构中的热光学特征和有关拐点(IFs)的性能为中心,重点研究金和银饰合金配置及其在不同折射率(RI)条件(n = 1.30 至 1.55)下的响应。金装饰合金表现出引人入胜的局部等离子体共振(LSPR),显示出 LSPR 在不同折射率条件下的偏移,表明响应有所改善,显著的红色和蓝色偏移(({\lambda }_{max}=\) 502-564 nm)显示出有效的吸收效率。与此相反,银装饰合金在较高的 RI 值下表现出更高的吸收效率,在各种 RI 值中表现出最小的 LPSR 偏移(\({\lambda }_{max}=\) 398-449 nm)。在热光子学方面,金/银装饰纳米复合材料的表面温度分别为 2.39 到 3.03 \(^\circ{rm C}\),特定光通量分别为 2.09 到 3.55 \(^\circ{rm C}\)。此外,RI 灵敏度也得到了提高,金装饰合金纳米复合材料的 RI 灵敏度从 144 纳米/RIU 提高到 308 纳米/RIU,银装饰合金纳米复合材料的 RI 灵敏度从 164 纳米/RIU 提高到 180 纳米/RIU。对金层和银层合金纳米结构的详细研究为开发超灵敏生物传感器和精确生物医学用途提供了新的机遇。 图文摘要
Refractive Index Sensitivity (RIS) and Thermoplasmonic Response of Au-/Ag-Decorated Alloy Nanoshells
The present study is centered around investigating the thermo-optical features and the performance concerning the inflection points (IFs) in hybrid composite nanostructures, focusing on Au- and Ag-decorated alloy configurations, and their response in diverse refractive index (RI) conditions (n = 1.30 to 1.55). Au-decorated alloys demonstrate intriguing localized plasmonic resonance (LSPR) exhibiting LSPR shifts in response to various RI’s, indicating improved response with notable red and blue shifts (\({\lambda }_{max}=\) 502–564 nm) indicating effective absorption efficiency. In contrast, Ag-decorated alloys exhibit enhanced absorption efficiency at higher RI’s, presenting minimal LPSR shifts (\({\lambda }_{max}=\) 398–449 nm) among various RI’s. In the context of thermoplasmonics, the surface temperature of Au/Ag-decorated nanocomposites exhibits ranges of 2.39 to 3.03 \(^\circ{\rm C}\), and 2.09 to 3.55 \(^\circ{\rm C}\) for specific optical flux, respectively. Furthermore, an improvement in RI sensitivity is achieved, ranging from 144 to 308 nm/RIU for Au-decorated and 164 to 180 nm/RIU for Ag-decorated alloy nanocomposites. Detailed scrutiny of Au and Ag-layered alloy nanostructures suggests new opportunities towards ultra-sensitive biosensors and precise biomedical uses.
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.