{"title":"Refractive Index Sensitivity (RIS) and Thermoplasmonic Response of Au-/Ag-Decorated Alloy Nanoshells","authors":"Kailash Bharti, S. S. Verma","doi":"10.1007/s11468-024-02317-1","DOIUrl":null,"url":null,"abstract":"<p>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 (<i>n</i> = 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 (<span>\\({\\lambda }_{max}=\\)</span> 502–564 nm) indicating effective absorption efficiency. In contrast, Ag-decorated alloys exhibit enhanced absorption efficiency at higher RI’s, presenting minimal LPSR shifts (<span>\\({\\lambda }_{max}=\\)</span> 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 <span>\\(^\\circ{\\rm C}\\)</span>, and 2.09 to 3.55 <span>\\(^\\circ{\\rm C}\\)</span> 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.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\n","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasmonics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1007/s11468-024-02317-1","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
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.