Nanofabrication of SERS Substrates for Single/Few Molecules Detection

Handle URI:
http://hdl.handle.net/10754/552375
Title:
Nanofabrication of SERS Substrates for Single/Few Molecules Detection
Authors:
Melino, Gianluca ( 0000-0001-8060-651X )
Abstract:
Raman spectroscopy is among the most widely employed methods to investigate the properties of materials in several fields of study. Evolution in materials science allowed us to fabricate suitable substrates, at the nanoscale, capable to enhance the electromagnetic field of the signals coming from the samples which at this range turn out to be in most cases singles or a few molecules. This particular variation of the classical technique is called SERS (Surface Enanched Raman Spectroscopy). In this work, the enhancement of the electromagnetic field is obtained by manipulation of the optical properties of metals with respect to their size. By using electroless deposition (bottom up technique), gold and silver nanoparticles were deposited in nanostructured patterns obtained on silicon wafers by means of electron beam lithography (top down technique). Rhodamine 6G in aqueous solution at extremely low concentration (10-8 M) was absorbed on the resultant dimers and the collection of the Raman spectra demonstrated the high efficiency of the substrates.
Advisors:
Di Fabrizio, Enzo ( 0000-0001-5886-4678 )
Committee Member:
Alshareef, Husam N. ( 0000-0001-5029-2142 ) ; Falqui, Andrea ( 0000-0002-1476-7742 )
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Program:
Materials Science and Engineering
Issue Date:
4-May-2015
Type:
Thesis
Appears in Collections:
Theses; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.advisorDi Fabrizio, Enzoen
dc.contributor.authorMelino, Gianlucaen
dc.date.accessioned2015-05-07T12:58:04Zen
dc.date.available2015-05-07T12:58:04Zen
dc.date.issued2015-05-04en
dc.identifier.urihttp://hdl.handle.net/10754/552375en
dc.description.abstractRaman spectroscopy is among the most widely employed methods to investigate the properties of materials in several fields of study. Evolution in materials science allowed us to fabricate suitable substrates, at the nanoscale, capable to enhance the electromagnetic field of the signals coming from the samples which at this range turn out to be in most cases singles or a few molecules. This particular variation of the classical technique is called SERS (Surface Enanched Raman Spectroscopy). In this work, the enhancement of the electromagnetic field is obtained by manipulation of the optical properties of metals with respect to their size. By using electroless deposition (bottom up technique), gold and silver nanoparticles were deposited in nanostructured patterns obtained on silicon wafers by means of electron beam lithography (top down technique). Rhodamine 6G in aqueous solution at extremely low concentration (10-8 M) was absorbed on the resultant dimers and the collection of the Raman spectra demonstrated the high efficiency of the substrates.en
dc.language.isoenen
dc.subjectSERSen
dc.subjectNanofabricationen
dc.subjectTop-downen
dc.subjectBottom-upen
dc.subjectRamanen
dc.subjectDetectionen
dc.titleNanofabrication of SERS Substrates for Single/Few Molecules Detectionen
dc.typeThesisen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
thesis.degree.grantorKing Abdullah University of Science and Technologyen_GB
dc.contributor.committeememberAlshareef, Husam N.en
dc.contributor.committeememberFalqui, Andreaen
thesis.degree.disciplineMaterials Science and Engineeringen
thesis.degree.nameMaster of Scienceen
dc.person.id129129en
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