不同环境下金、银纳米粒子的折射率传感性能

IF 2.7 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Particle & Particle Systems Characterization Pub Date : 2023-11-23 DOI:10.1002/ppsc.202300143
Meiying Li, Kang Yang
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引用次数: 0

摘要

局域表面等离子体共振传感器由于对周围环境变化的敏感响应,在生物/化学物质的检测中有着广泛的应用。传统上,局部表面等离子体共振传感器的灵敏度研究主要集中在传感器结构的形态和材料上。本文从理论上研究了环境折射率对金(Au)纳米粒子传感器灵敏度的影响。结果表明,当传感器附近自由目标较少时,当折射率从1.00增加到1.10时,传感器的传感性能较好。然而,当目标层紧密覆盖在Au纳米颗粒上时,环境折射率降低0.1可以显著提高灵敏度。在银(Ag)纳米颗粒上也可以得到类似的结果。这项工作为表面等离子体共振传感器的高级传感应用提供了新的认识。
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The Refractive Index Sensing Performance of Au and Ag Nanoparticles Under Different Surrounding Environment
Benefiting from the sensitive response to the change of surrounding environment, localized surface plasmon resonance sensors have wide applications for the detection of bio-/chemical species. Traditionally, the sensitivity research of localized surface plasmon resonance sensors mainly focused on the morphologies and materials of sensor structures. Instead, the effect of environmental refractive index on sensitivity of a gold (Au) nanoparticle sensor is theoretically investigated in this work. The results show that when few free targets are adjacent to the sensor, a better sensing performance can be achieved as the refractive index increases from 1.00 to 1.10. However, when a target layer is closely covered on the Au nanoparticle, a 0.1 decrease in environmental refractive index can lead to a significant improvement in sensitivity. The similar results can be also obtained on a silver (Ag) nanoparticle. This work provides new understandings for advanced sensing applications of surface plasmon resonance sensors.
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来源期刊
Particle & Particle Systems Characterization
Particle & Particle Systems Characterization 工程技术-材料科学:表征与测试
CiteScore
5.50
自引率
0.00%
发文量
114
审稿时长
3.0 months
期刊介绍: Particle & Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal focusing on all aspects of particle research. The journal joined the Advanced Materials family of journals in 2013. Particle has an impact factor of 4.194 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). Topics covered include the synthesis, characterization, and application of particles in a variety of systems and devices. Particle covers nanotubes, fullerenes, micelles and alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems. Particle Systems include those in biomedicine, catalysis, energy-storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and others. Characterization methods include microscopy, spectroscopy, electrochemical, diffraction, magnetic, and scattering techniques.
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