Publication:
Use of an elastic buffer layer for improved performance of a polymer microcylinder ring resonator hydrogen sensor

dc.contributor.departmentDepartment of Mechanical Engineering
dc.contributor.departmentDepartment of Physics
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.departmentKUTTAM (Koç University Research Center for Translational Medicine)
dc.contributor.departmentKUYTAM (Koç University Surface Science and Technology Center)
dc.contributor.kuauthorAlaca, Burhanettin Erdem
dc.contributor.kuauthorAli, Basit
dc.contributor.kuauthorBavili, Nima
dc.contributor.kuauthorKiraz, Alper
dc.contributor.kuauthorMorova, Berna
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteResearch Center
dc.date.accessioned2024-11-09T23:44:10Z
dc.date.issued2022
dc.description.abstractThe impact of substrate on Pd nanofilm expansion in a Pd-H-2 system is investigated using polymer microcylinder ring resonator (PMRR) platform. Being a highly sensitive platform for H-2 gas detection, PMRR comprises of an inner sensitive Pd nanofilm and an outer PDMS layer coated on a standard optical fiber. Optical whispering gallery modes (WGMs) are excited in the rim of the outermost PDMS layer through evanescent field of a tapered fiber. H-2 molecules penetrating the H-2-sensitive Pd nanofilm through the PDMS layer cause reversible expansion in the PMRR. This translates into shifts in spectral positions of the WGMs that are observed with tapered fiber transmission spectroscopy. Two types of PMRRs were fabricated. In the first type, Pd nanofilm was directly deposited on the silica surface of an optical fiber. In the other one, a PDMS buffer layer was precoated between Pd nanofilm and the silica surface, with different thicknesses. It is demonstrated that, the use of a PDMS buffer layer yields higher radial expansion of the nanofilm during the interaction with H-2 gas. A 180-nm-thick Pd nanofilm coated on similar to 2.5-mu m-thick PDMS buffer layer showed at least 18% higher radial expansion compared to the case without buffer layer. Identical thickness of Pd nanofilm on a similar to 3.5-mu m-thick PDMS buffer layer showed 30% higher radial expansion. Numerical and analytical calculations were also performed confirming the experimental results. Among mechanical properties of the PDMS buffer layer, Poisson's ratio was found to be the most significant parameter affecting the expansion of the nanofilm.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.openaccessNO
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.sponsorshipTurkish Academy of Sciences (TUEBA) A. Kiraz acknowledges partial support from the Turkish Academy of Sciences (TUEBA) .
dc.description.volume358
dc.identifier.doi10.1016/j.snb.2022.131431
dc.identifier.eissn0925-4005
dc.identifier.scopus2-s2.0-85123851765
dc.identifier.urihttps://doi.org/10.1016/j.snb.2022.131431
dc.identifier.urihttps://hdl.handle.net/20.500.14288/13616
dc.identifier.wos782124700002
dc.keywordsHydrogen sensor
dc.keywordsPalladium nanofilm
dc.keywordsMicroresonator
dc.keywordsWhispering gallery mode
dc.keywordsRing resonator
dc.keywordsFinite element method
dc.language.isoeng
dc.publisherElsevier Science Sa
dc.relation.ispartofSensors and Actuators B-Chemical
dc.subjectChemistry
dc.subjectAnalytical
dc.subjectElectrochemistry
dc.subjectInstruments
dc.subjectInstrumentation
dc.titleUse of an elastic buffer layer for improved performance of a polymer microcylinder ring resonator hydrogen sensor
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorBavili, Nima
local.contributor.kuauthorAli, Basit
local.contributor.kuauthorMorova, Berna
local.contributor.kuauthorAlaca, Burhanettin Erdem
local.contributor.kuauthorKiraz, Alper
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Sciences
local.publication.orgunit1College of Engineering
local.publication.orgunit1Research Center
local.publication.orgunit2Department of Physics
local.publication.orgunit2Department of Mechanical Engineering
local.publication.orgunit2KUYTAM (Koç University Surface Science and Technology Center)
local.publication.orgunit2KUTTAM (Koç University Research Center for Translational Medicine)
local.publication.orgunit2Graduate School of Sciences and Engineering
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