Thermoreflectance for Contactless Sintering Characterization: From Metal Nanoparticles to Stretchable Conductors

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dc.contributor.advisorGrau, Gerd
dc.contributor.authorRahman, Md Saifur
dc.date.accessioned2021-07-06T12:39:22Z
dc.date.available2021-07-06T12:39:22Z
dc.date.copyright2020-06
dc.date.issued2021-07-06
dc.date.updated2021-07-06T12:39:22Z
dc.degree.disciplineElectrical and Computer Engineering
dc.degree.levelMaster's
dc.degree.nameMASc - Master of Applied Science
dc.description.abstractSintering metal nanoparticles is a crucial step to achieve printed conductors. It is important to characterize and monitor nanoparticle sintering for process optimization and control. Here, we demonstrate that frequency-domain thermoreflectance (FDTR), an optical pump-probe technique, can be used for non-contact, non-destructive process monitoring that is compatible with high-throughput printed electronics manufacturing, unlike traditional electrical resistance measurements. The thermal conductivity measured from FDTR agrees well with thermal conductivity calculated using Wiedemann-Franz law from electrical conductivity measurements. Measurement time is reduced to 12 s by choosing a small number of measurement frequencies instead of a full frequency sweep and measuring them simultaneously. A Monte Carlo simulation was performed to predict the possibility of further reducing measurement time. Understanding of the sintering process allows tailoring of materials properties as demonstrated here to create a novel stretchable conductor. Differently sintered layers are combined to achieve a desirable stretchability-conductivity profile.
dc.identifier.urihttp://hdl.handle.net/10315/38415
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectMechanics
dc.subject.keywordsPrinted Electronics
dc.subject.keywordsStretchable Electronics
dc.subject.keywordsThermoreflectance
dc.subject.keywordsMetal Nanoparticles
dc.subject.keywordsSintering
dc.subject.keywordsMetal Flake ink
dc.subject.keywordsIntense Pulsed Light Sintering
dc.subject.keywordsNon-destructive Characterization
dc.subject.keywordsThermal Conductivity
dc.subject.keywordsPump-Probe Technique
dc.subject.keywordsSolution Processable Electronics
dc.titleThermoreflectance for Contactless Sintering Characterization: From Metal Nanoparticles to Stretchable Conductors
dc.typeElectronic Thesis or Dissertation

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