Shape and deposition angle control of silver film-over-nanosphere SERS substrates

Simple item page
buir.contributor.authorDemir, Ahmet Kemal
buir.contributor.orcidDemir, Ahmet Kemal|0000-0002-3251-9793
dc.citation.epage505709-8en_US
dc.citation.issueNumber50en_US
dc.citation.spage505709-1en_US
dc.citation.volumeNumber32en_US
dc.contributor.authorEsmaeilzad, Nasim Seyedpour
dc.contributor.authorDemirtaş, Özge
dc.contributor.authorDemir, Ahmet Kemal
dc.contributor.authorBek, Alpan
dc.date.accessioned2021-12-09T09:20:04Z
dc.date.available2021-12-09T09:20:04Z
dc.date.issued2021-10-06
dc.departmentDepartment of Physicsen_US
dc.description.abstractThin metallic films on dielectric nanospheres are demonstrated to have a high potential for the fabrication of cost-effective SERS substrates. In addition to the morphological advantages that nanospheres offer for attaining a high density of hot spots, possessing shape adjustability by uncomplicated thermal treatment makes them an attractive platform for tuneable SERS substrates. Furthermore, when combined with the oblique angle metal deposition technique, adjustable gaps at a high density and adjustable shape of metal films, such as Ag films, can be achieved on nanospheres. Applying small changes in deposition angle can provide means for fine adjustment of the Raman enhancement factor (EF), resulting in EF up to 108 measured using crystal violet dye molecule as a Raman analyte. This practice paves the way for the fabrication of high EF SERS substrates at a reasonable cost using a monolayer of self-organized nanosphere patterns. An ultra-thin Ag film coated at 5° tilt is shown to be an excellent substitute for a film deposited at 0° with double the thickness. There is a strong agreement between the experimental results and finite-elements-method-based Maxwell simulations exhibiting expected field enhancements up to 109 at a tilt angle of 5°.en_US
dc.identifier.doi10.1088/1361-6528/ac2765en_US
dc.identifier.eissn1361-6528
dc.identifier.issn0957-4484
dc.identifier.urihttp://hdl.handle.net/11693/76710
dc.language.isoEnglishen_US
dc.publisherInstitute of Physics Publishingen_US
dc.relation.isversionofhttps://doi.org/10.1088/1361-6528/ac2765en_US
dc.source.titleNanotechnologyen_US
dc.subjectNanospheresen_US
dc.subjectEnhanced Raman spectroscopyen_US
dc.subjectOblique angle depositionen_US
dc.subjectShape controlen_US
dc.titleShape and deposition angle control of silver film-over-nanosphere SERS substratesen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Shape_and_deposition_angle_control_of_silver_film-over-nanosphere_SERS_substrates.pdf
Size:
880.38 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.69 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Department of Physics