Numerical analysis of surface plasmon resonance and photothermal properties of silica/gold/graphene and hollow/gold/graphene core-multi-shell nanoparticles

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-05-13 DOI:10.1016/j.matchemphys.2025.131012

E. Farkouch , A. Akouibaa , R. Masrour , S. Mordane , M. Benhamou , Heryanto Heryanto , A. El assyry

{"title":"Numerical analysis of surface plasmon resonance and photothermal properties of silica/gold/graphene and hollow/gold/graphene core-multi-shell nanoparticles","authors":"E. Farkouch , A. Akouibaa , R. Masrour , S. Mordane , M. Benhamou , Heryanto Heryanto , A. El assyry","doi":"10.1016/j.matchemphys.2025.131012","DOIUrl":null,"url":null,"abstract":"<div><div>Multilayer nanoparticles (NPs) with gold (Au) and graphene (Gr) shells are increasingly important in nanotechnology due to their unique properties and applications. These NPs enhance surface plasmon resonance (SPR), allowing precise control over their optical properties and absorption intensity. This study investigates the SPR characteristics of two spherical core-shell NPs: (SiO<sub>2</sub>/Au/Gr) and (Hollow/Au/Gr), using the finite element method (FEM). The optical parameters analyzed include dielectric constant, absorption cross-section, and optical conductivity. Results indicate that the Gr-shell causes a red shift in the SPR peak and reduces absorption amplitude, with effects becoming more pronounced as the number of Gr sheets increases. The intermediate Au-shell thickness is crucial for plasmonic coupling; as it decreases, the resonance frequency shifts towards the near-infrared (NIR) region, increasing SPR peak amplitude. Enhancing near-field and thermoplasmonic efficiency converting light energy into heat under SPR can be optimized by adjusting Au shell thickness and Gr sheet count. This flexibility allows for the design of nanostructures suitable for various applications, including SPR detection, photothermal therapy, and ultrasensitive optical sensors, where precise SPR control is vital.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 131012"},"PeriodicalIF":4.3000,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Chemistry and Physics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0254058425006583","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Multilayer nanoparticles (NPs) with gold (Au) and graphene (Gr) shells are increasingly important in nanotechnology due to their unique properties and applications. These NPs enhance surface plasmon resonance (SPR), allowing precise control over their optical properties and absorption intensity. This study investigates the SPR characteristics of two spherical core-shell NPs: (SiO₂/Au/Gr) and (Hollow/Au/Gr), using the finite element method (FEM). The optical parameters analyzed include dielectric constant, absorption cross-section, and optical conductivity. Results indicate that the Gr-shell causes a red shift in the SPR peak and reduces absorption amplitude, with effects becoming more pronounced as the number of Gr sheets increases. The intermediate Au-shell thickness is crucial for plasmonic coupling; as it decreases, the resonance frequency shifts towards the near-infrared (NIR) region, increasing SPR peak amplitude. Enhancing near-field and thermoplasmonic efficiency converting light energy into heat under SPR can be optimized by adjusting Au shell thickness and Gr sheet count. This flexibility allows for the design of nanostructures suitable for various applications, including SPR detection, photothermal therapy, and ultrasensitive optical sensors, where precise SPR control is vital.

查看原文本刊更多论文

二氧化硅/金/石墨烯和空心/金/石墨烯核-多壳纳米粒子表面等离子体共振和光热性质的数值分析

具有金（Au）和石墨烯（Gr）壳层的多层纳米粒子（NPs）由于其独特的性能和应用在纳米技术中越来越重要。这些NPs增强表面等离子体共振（SPR），允许精确控制其光学特性和吸收强度。采用有限元法研究了（SiO2/Au/Gr）和（Hollow/Au/Gr）两种球形核壳纳米粒子的SPR特性。分析的光学参数包括介电常数、吸收截面和光电导率。结果表明，Gr-壳层引起SPR峰的红移，降低了吸收振幅，并且随着Gr层数的增加，这种影响变得更加明显。中间金壳厚度对等离子体耦合至关重要；随着它的减小，共振频率向近红外（NIR）区域移动，SPR峰值幅度增大。通过调整Au层厚度和Gr片数，可以优化提高SPR条件下近场和热等离子体光热转换效率。这种灵活性允许设计适合各种应用的纳米结构，包括SPR检测，光热治疗和超灵敏光学传感器，其中精确的SPR控制至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.