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Gold-coated nanoripples produced by UV-Femtosecond lasers for surface enhanced Raman spectroscopy

hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorLI, Nan
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorHUANG, Xi
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorDONG, Haoyu
hal.structure.identifierDepartment of Mechanical and Materials Engineering
hal.structure.identifierUniversity of Nebraska Medical Center
dc.contributor.authorDUAN, Bin
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorZHU, Qiuchi
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorMAO, Aofei
hal.structure.identifierDepartment of Electrical and Computer Engineering
dc.contributor.authorLI, Peizi
hal.structure.identifierDepartment of Mechanical and Materials Engineering
dc.contributor.authorCUI, Bai
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSILVAIN, Jean-Francois
hal.structure.identifierDepartment of Mechanical and Materials Engineering
dc.contributor.authorLU, Yongfeng
dc.date.issued2023
dc.identifier.issn0169-4332
dc.description.abstractEnFemtosecond (fs) lasers have been recognized as a powerful tool for micro/nanofabrication, due to their advantages of high flexibility, high repeatability, and minimal introduction of heat. Many studies have been made to employ fs laser processing in fabrication of nanostructures on substrates for surface-enhanced Raman spectroscopy (SERS). However, there have been few reports of ultraviolet (UV)-fs-laser-induced nanoripples for SERS experiments. In this study, we developed simple, easy-to-prepare, and large-active-area SERS substrates using UV-fs laser irradiation. Nanoripples induced in open air by the UV-fs laser on Silicon (Si) substrates with gold coatings were used as SERS-active substrates. Nanoripple evolution by the UV-fs laser was explored to establish the processing windows for nanoripple formation as functions of laser fluence and hatching distances. Moreover, SERS enhancement factors (EFs) were correlated with the laser induced nanoripple patterns. SERS EFs up to 2.4 × 107 were achieved for Rhodamine 6G (R6G) molecules on the laser-textured Si substrates with Au coatings of 34 nm thick. The average period of nanoripples for the highest SERS EF is 253 nm, fabricated by a laser fluence of 0.48 J/cm2 and a hatching distance of 38 µm. R6G concentration down to 10−9 mol/L was detected on the laser-textured Si substrate. Besides Si substrates, three other materials, stainless steel, glass, and polystyrene, were also investigated for nanoripple formation and SERS measurements. Nanoripple structures were formed on stainless-steel surfaces and the highest SERS EF of 1.5 × 107 was achieved. For glass and polystyrene substrates, no nanoripple structures were found. As a result, the SERS EFs (∼106) of glass and polystyrene are one order of magnitude lower than those of the Si and stainless-steel substrates. The SERS demonstration using these materials further supports the mechanisms of nanoripple formation and provides a foundation to make UV-fs laser processing an effective technique for SERS applications using various materials. Applications for Sudan I, small extracellular vesicles (sEVs), and glucose were explored and demonstrated the capability of the SERS substrates.
dc.language.isoen
dc.publisherElsevier
dc.subject.enUV Femtosecond laser
dc.subject.enNanoripples
dc.subject.enSERS
dc.title.enGold-coated nanoripples produced by UV-Femtosecond lasers for surface enhanced Raman spectroscopy
dc.typeArticle de revue
dc.identifier.doi10.1016/j.apsusc.2023.157794
dc.subject.halChimie/Matériaux
bordeaux.journalApplied Surface Science
bordeaux.page157794
bordeaux.volume636
bordeaux.peerReviewedoui
hal.identifierhal-04185186
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04185186v1
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