{"id":{"repo_id":"soton","oai_identifier":"oai:eprints.soton.ac.uk:191315"},"canonical_url":"https://search.dev.ndltd.org/etd/soton/oai:eprints.soton.ac.uk:191315","repository":{"repo_id":"soton","name":"University of Southampton","base_url":"https://eprints.soton.ac.uk/cgi/oai2"},"display":{"title":"Tailoring plasmonic substrates for SERS","abstract":"SERS is a useful spectroscopic technique that was discovered 30 years ago, and has recently seen a renaissance in research. Sphere segment void (SSV) substrates have been developed as reproducible, stable SERS substrates by electrodeposition of a metal through a colloidal template.<br/>The effect of adsorbing an organic monolayer on the surface of an SSV substrate was studied, which results in a slight shift in the plasmonic absorption. This was compared with the reduction of a diazonium salt on the surface, which results in a significant increase in plasmonic absorption, attributed to a physical sharpening of the metal structure, and in turn better defined plasmon modes.<br/>The Au surface was also modified with an ultra thin layer of Pt, and a comparison was made between oxidation-reduction cycled roughened (ORC) and SSV substrates with and without Pt. The SSV substrates were found to be more reproducible, and (after modification with a thin-layer of Pt), gave spectra more representative of bulk Pt substrates than ORC.<br/>Lastly the surface was functionalised with metallic nanoparticles (NPs), and a large increase in spectral intensity was observed. This was attributed to a strongly localised electric field between the NP and the substrate, which resulted in an additional enhancement of between 102-103 depending on the method of assembly used. Functionalisation of the NPs introduced the possibility of drug detection or studies in drug delivery using such a system","abstract_html":"SERS is a useful spectroscopic technique that was discovered 30 years ago, and has recently seen a renaissance in research. Sphere segment void (SSV) substrates have been developed as reproducible, stable SERS substrates by electrodeposition of a metal through a colloidal template.&lt;br/&gt;The effect of adsorbing an organic monolayer on the surface of an SSV substrate was studied, which results in a slight shift in the plasmonic absorption. This was compared with the reduction of a diazonium salt on the surface, which results in a significant increase in plasmonic absorption, attributed to a physical sharpening of the metal structure, and in turn better defined plasmon modes.&lt;br/&gt;The Au surface was also modified with an ultra thin layer of Pt, and a comparison was made between oxidation-reduction cycled roughened (ORC) and SSV substrates with and without Pt. The SSV substrates were found to be more reproducible, and (after modification with a thin-layer of Pt), gave spectra more representative of bulk Pt substrates than ORC.&lt;br/&gt;Lastly the surface was functionalised with metallic nanoparticles (NPs), and a large increase in spectral intensity was observed. This was attributed to a strongly localised electric field between the NP and the substrate, which resulted in an additional enhancement of between 102-103 depending on the method of assembly used. Functionalisation of the NPs introduced the possibility of drug detection or studies in drug delivery using such a system","abstract_has_math":false,"creators":["Speed, Jonathon"],"institution":"University of Southampton","degree_name":"Ph.D.","degree_level":"doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Russell, Andrea E."],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-04","date_published":"2011-04","updated_at":"2026-07-24T04:36:25Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Russell, Andrea E."]},{"key":"dc:creator","label":"Author","values":["Speed, Jonathon"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-04-06"]},{"key":"dc:date.issued","label":"Date","values":["2011-04"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Chemistry (pre 2011 reorg)","Chemistry"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Southampton"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://eprints.soton.ac.uk/191315/"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["doctoral"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["Ph.D."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://eprints.soton.ac.uk/191315/1/Jonathon_Speed_Thesis.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["SERS is a useful spectroscopic technique that was discovered 30 years ago, and has recently seen a renaissance in research. Sphere segment void (SSV) substrates have been developed as reproducible, stable SERS substrates by electrodeposition of a metal through a colloidal template.<br/>The effect of adsorbing an organic monolayer on the surface of an SSV substrate was studied, which results in a slight shift in the plasmonic absorption. This was compared with the reduction of a diazonium salt on the surface, which results in a significant increase in plasmonic absorption, attributed to a physical sharpening of the metal structure, and in turn better defined plasmon modes.<br/>The Au surface was also modified with an ultra thin layer of Pt, and a comparison was made between oxidation-reduction cycled roughened (ORC) and SSV substrates with and without Pt. The SSV substrates were found to be more reproducible, and (after modification with a thin-layer of Pt), gave spectra more representative of bulk Pt substrates than ORC.<br/>Lastly the surface was functionalised with metallic nanoparticles (NPs), and a large increase in spectral intensity was observed. This was attributed to a strongly localised electric field between the NP and the substrate, which resulted in an additional enhancement of between 102-103 depending on the method of assembly used. Functionalisation of the NPs introduced the possibility of drug detection or studies in drug delivery using such a system"]},{"key":"dc:format","label":"Dc Format","values":["text"]},{"key":"dc:title","label":"Title","values":["Tailoring plasmonic substrates for SERS"]}]}],"canonical_facts":{"dc:contributor.advisor":["Russell, Andrea E."],"dc:creator":["Speed, Jonathon"],"dc:date":["2011-04-06"],"dc:date.issued":["2011-04"],"dc:description.abstract":["SERS is a useful spectroscopic technique that was discovered 30 years ago, and has recently seen a renaissance in research. Sphere segment void (SSV) substrates have been developed as reproducible, stable SERS substrates by electrodeposition of a metal through a colloidal template.<br/>The effect of adsorbing an organic monolayer on the surface of an SSV substrate was studied, which results in a slight shift in the plasmonic absorption. This was compared with the reduction of a diazonium salt on the surface, which results in a significant increase in plasmonic absorption, attributed to a physical sharpening of the metal structure, and in turn better defined plasmon modes.<br/>The Au surface was also modified with an ultra thin layer of Pt, and a comparison was made between oxidation-reduction cycled roughened (ORC) and SSV substrates with and without Pt. The SSV substrates were found to be more reproducible, and (after modification with a thin-layer of Pt), gave spectra more representative of bulk Pt substrates than ORC.<br/>Lastly the surface was functionalised with metallic nanoparticles (NPs), and a large increase in spectral intensity was observed. This was attributed to a strongly localised electric field between the NP and the substrate, which resulted in an additional enhancement of between 102-103 depending on the method of assembly used. Functionalisation of the NPs introduced the possibility of drug detection or studies in drug delivery using such a system"],"dc:format":["text"],"dc:identifier.uri":["https://eprints.soton.ac.uk/191315/1/Jonathon_Speed_Thesis.pdf"],"dc:publisher.department":["Chemistry (pre 2011 reorg)","Chemistry"],"dc:publisher.institution":["University of Southampton"],"dc:relation.isreferencedby":["https://eprints.soton.ac.uk/191315/"],"dc:title":["Tailoring plasmonic substrates for SERS"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["doctoral"],"dc:type.qualificationname":["Ph.D."]},"updated_at":"2026-07-24T04:36:25Z"}