{"id":{"repo_id":"york","oai_identifier":"oai:yorkspace.library.yorku.ca:10315/38415"},"canonical_url":"https://search.dev.ndltd.org/etd/york/oai:yorkspace.library.yorku.ca:10315/38415","repository":{"repo_id":"york","name":"York University","base_url":"https://yorkspace.library.yorku.ca/oai/request"},"display":{"title":"Thermoreflectance for Contactless Sintering Characterization: From Metal Nanoparticles to Stretchable Conductors","abstract":"Sintering 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.","abstract_html":"Sintering 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.","abstract_has_math":false,"creators":["Rahman, Md Saifur"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Grau, Gerd"],"committee_chairs":[],"committee_members":[],"year":2021,"date_issued":"2021-07-06","date_published":"2021-07-06","updated_at":"2026-07-24T06:34:05Z","subjects":["Mechanics"],"languages":["en"],"rights":["Author owns copyright, except where explicitly noted. Please contact the author directly with licensing requests."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10315/38415","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Grau, Gerd"]},{"key":"dc:creator","label":"Author","values":["Rahman, Md Saifur"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2021-07-06T12:39:22Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2021-07-06T12:39:22Z"]},{"key":"dc:date.issued","label":"Date","values":["2021-07-06"]},{"key":"dc:type","label":"Dc Type","values":["Electronic Thesis or Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Mechanics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Author owns copyright, except where explicitly noted. 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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."]},{"key":"dc:title","label":"Title","values":["Thermoreflectance for Contactless Sintering Characterization: From Metal Nanoparticles to Stretchable Conductors"]}]}],"canonical_facts":{"dc:contributor.advisor":["Grau, Gerd"],"dc:creator":["Rahman, Md Saifur"],"dc:date.accessioned":["2021-07-06T12:39:22Z"],"dc:date.available":["2021-07-06T12:39:22Z"],"dc:date.issued":["2021-07-06"],"dc:description.abstract":["Sintering 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. 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