Plasmonic Tri-Metallic Hybrid Nanostructures on Porous Silicon: a High-Performance SERS Platform for Monitoring Environmental Pollutants

IF 5.6 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2026-09-23 DOI:10.1007/s11468-026-03481-2

Amer B. Dheyab, Alwan M. Alwan, Intisar A. Naseef, Aseel I. Mahmood, Allaa A. Jabbar

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引用次数: 0

Abstract

This study reports the fabrication and performance evaluation of advanced multilayer hybrid plasmonic SERS sensors based on tri-material core–shell nanostructures deposited on macroporous silicon (McPSi) substrates. Two distinct nanoparticle architectures AgNPs core/AuNPs shell/AgNPs shell and AuNPs core/AgNPs shell/AuNPs shell—were successfully synthesized and integrated onto the McPSi surface, forming highly efficient SERS-active platforms. Owing to the synergistic plasmonic coupling between the multilayer metallic shells and the high surface area of the porous silicon substrate, both configurations exhibited outstanding sensing performance. The AgNPs core/AuNPs shell/AgNPs shell and AuNPs core/AgNPs shell/AuNPs shell sensors achieved ultralow detection limits of 1 × 10⁻¹² M and 2 × 10⁻¹³ M, respectively. Moreover, remarkably high Raman enhancement factors of 1 × 10⁸ and 5 × 10⁷ were obtained, indicating strong electromagnetic field localization and dense plasmonic hot-spot formation. These results demonstrate the superior signal amplification capability and exceptional sensitivity of the proposed hybrid sensors, highlighting their strong potential for ultra-trace detection of environmental contaminants and advanced biosensing applications.

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多孔硅上的等离子体三金属杂化纳米结构：一种监测环境污染物的高性能SERS平台

本研究报道了基于大孔硅（McPSi）衬底上三材料核壳纳米结构的先进多层杂化等离子体SERS传感器的制备和性能评价。成功合成了AgNPs核/AuNPs壳/AgNPs壳和AuNPs核/AgNPs壳/AuNPs壳两种不同的纳米颗粒结构，并将其集成到McPSi表面，形成了高效的sers活性平台。由于多层金属壳与多孔硅衬底的高表面积之间的协同等离子体耦合，两种结构都表现出优异的传感性能。AgNPs核心/AuNPs外壳/AgNPs外壳和AuNPs核心/AgNPs外壳/AuNPs外壳传感器的超低检出限分别为1 × 10⁻¹²M和2 × 10⁻³M。此外，获得了1 × 10⁸和5 × 10⁷显著高的拉曼增强因子，表明强电磁场局部化和密集等离子体热点形成。这些结果证明了所提出的混合传感器优越的信号放大能力和卓越的灵敏度，突出了它们在超痕量检测环境污染物和先进生物传感应用方面的强大潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.