{"title":"Laser-Induced Nano-Functional Surfaces for Enhanced SERS Performance","authors":"Hardik Vaghasiya, Paul-Tiberiu Miclea","doi":"10.1002/admi.202500366","DOIUrl":null,"url":null,"abstract":"<p>Nanostructured metal surfaces play a crucial role in sensing applications, particularly in Surface-Enhanced Raman Spectroscopy (SERS). In this study, laser-induced periodic surface structures (LIPSS) are fabricated on silicon substrates using femtosecond laser irradiation to investigate their formation mechanisms and impact on Raman signal enhancement. By systematically varying the laser fluence and pulse number, their effects are examined on LIPSS periodicity and, consequently, SERS performance. The results reveal that increasing laser fluence from 0.80 to 1.40 J/cm<sup>2</sup> significantly reduces LIPSS periodicity due to enhanced Surface Plasmon Polaritons (SPPs) excitation and energy redistribution. LIPSS exhibit elongated elliptical structures at lower pulse numbers, which gradually transition into circular patterns with increasing pulses, driven by electric field redistribution and interference effects. The influence of LIPSS on SERS is systematically analyzed using a thiophenol solution to evaluate Raman signal sensitivity. The results demonstrate that precisely tuned periodicity and depth of LIPSS significantly enhance SERS signals by optimizing localized electromagnetic fields and plasmonic resonance effects. Notably, LIPSS with a periodicity of ∼795 nm exhibited the highest enhancement due to the resonant coupling of SPPs with the excitation laser, while optimal depths (∼352–547 nm) balanced hotspot density and plasmonic efficiency.</p>","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"12 14","pages":""},"PeriodicalIF":4.4000,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202500366","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Materials Interfaces","FirstCategoryId":"88","ListUrlMain":"https://advanced.onlinelibrary.wiley.com/doi/10.1002/admi.202500366","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Nanostructured metal surfaces play a crucial role in sensing applications, particularly in Surface-Enhanced Raman Spectroscopy (SERS). In this study, laser-induced periodic surface structures (LIPSS) are fabricated on silicon substrates using femtosecond laser irradiation to investigate their formation mechanisms and impact on Raman signal enhancement. By systematically varying the laser fluence and pulse number, their effects are examined on LIPSS periodicity and, consequently, SERS performance. The results reveal that increasing laser fluence from 0.80 to 1.40 J/cm2 significantly reduces LIPSS periodicity due to enhanced Surface Plasmon Polaritons (SPPs) excitation and energy redistribution. LIPSS exhibit elongated elliptical structures at lower pulse numbers, which gradually transition into circular patterns with increasing pulses, driven by electric field redistribution and interference effects. The influence of LIPSS on SERS is systematically analyzed using a thiophenol solution to evaluate Raman signal sensitivity. The results demonstrate that precisely tuned periodicity and depth of LIPSS significantly enhance SERS signals by optimizing localized electromagnetic fields and plasmonic resonance effects. Notably, LIPSS with a periodicity of ∼795 nm exhibited the highest enhancement due to the resonant coupling of SPPs with the excitation laser, while optimal depths (∼352–547 nm) balanced hotspot density and plasmonic efficiency.
期刊介绍:
Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018.
The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface.
Advanced Materials Interfaces covers all topics in interface-related research:
Oil / water separation,
Applications of nanostructured materials,
2D materials and heterostructures,
Surfaces and interfaces in organic electronic devices,
Catalysis and membranes,
Self-assembly and nanopatterned surfaces,
Composite and coating materials,
Biointerfaces for technical and medical applications.
Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.