Nanostructured Au/Si substrate for organic molecule SERS detection

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dc.contributor.authorIgnat, Teodora
dc.contributor.authorMunoz, Roberto
dc.contributor.authorIrina, Kleps
dc.contributor.authorObieta, Isabel
dc.contributor.authorMihaela, Miu
dc.contributor.authorSimion, Monica
dc.contributor.authorIovu, Mircea
dc.contributor.institutionTecnalia Research & Innovation
dc.date.accessioned2024-07-24T11:59:43Z
dc.date.available2024-07-24T11:59:43Z
dc.date.issued2009-09
dc.description.abstractNanoparticles of noble metals, such as gold and silver, exhibit unique and tunable optical properties on account of their surface plasmon resonance. In particular, gold nanoparticles on silicon substrates are attractive for future nanoscale sensors and optical devices due to their resistance to oxidation and due to their electrical and optical properties. In this study, we developed a nanostructured gold/macroporous silicon (Au/PS) substrate capped with 11-mercaptoundecanoic acid (11-MUA) with ultra-sensitive detection properties achieved in characterization, an approach based on surface-enhanced Raman scattering (SERS). Surface-enhanced Raman scattering allows us to detect substances at a low concentration level and to observe structural details of a thiol molecule bonded to small film thicknesses. Raman measurements were carried out at 514 nm and 785 nm. In order to emphasize the effect of the Si microstructuration on the efficiency of this new substrate (Au/PS) proposed for SERS experiments, the same molecule (11-MUA) was adsorbed on it as well as on gold/atomically flat silicon (Au/Si) and on commercial Klarite (Mesophotonics) substrates. Systematic studies realized by Raman spectroscopy, electron microscopy, and X-ray spectroscopy show the influence of silicon substrate texturing and metallic deposition conditions, including time and temperature on the optical phenomena.en
dc.description.sponsorshipThe authors thank PhD Adrian Dinescu for helping with the SEM experiments. This work was supported by the Ministry of Education and Research by the TD437/2007 and ID_ 884/2007 projects.
dc.description.statusPeer reviewed
dc.format.extent10
dc.identifier.citationIgnat , T , Munoz , R , Irina , K , Obieta , I , Mihaela , M , Simion , M & Iovu , M 2009 , ' Nanostructured Au/Si substrate for organic molecule SERS detection ' , Superlattices and Microstructures , vol. 46 , no. 3 , pp. 451-460 . https://doi.org/10.1016/j.spmi.2009.07.019
dc.identifier.doi10.1016/j.spmi.2009.07.019
dc.identifier.issn0749-6036
dc.identifier.urihttps://hdl.handle.net/11556/2972
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=68349131619&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofSuperlattices and Microstructures
dc.relation.projectIDHaridus- ja Teadusministeerium, HM, _ 884/2007-TD437/2007
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsGold
dc.subject.keywordsNanograins
dc.subject.keywordsNanostructure
dc.subject.keywordsPorous silicon
dc.subject.keywordsSERS
dc.subject.keywordsGeneral Materials Science
dc.subject.keywordsCondensed Matter Physics
dc.subject.keywordsElectrical and Electronic Engineering
dc.titleNanostructured Au/Si substrate for organic molecule SERS detectionen
dc.typejournal article
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