{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/50413"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/50413","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Quantitative viscoelastic spectroscopy of polymer films using Lorentz force actuated contact resonance atomic force microscopy","abstract":"Embargo set by: Seth Robbins for item 50524 Lift date: 2016-09-16T17:13:01Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","abstract_html":"Embargo set by: Seth Robbins for item 50524 Lift date: 2016-09-16T17:13:01Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","abstract_has_math":false,"creators":["Bakir, Mete"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["King, William P."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-09-16T17:12:43Z","date_published":"2014-09-16T17:12:43Z","updated_at":"2026-07-22T22:25:40Z","subjects":["Quantitave Viscoelastic Spectroscopy","Nanomechanical Characterization","Block Copolymers Morphologies","Multi-Frequency Atomic Force Microscopy (AFM)","Cantilever Mathematical Modelling","Contact Resonance Atomic Force Microscopy (AFM)"],"languages":["en"],"rights":["Copyright 2014 Mete Bakir"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/50413","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["King, William P."]},{"key":"dc:creator","label":"Author","values":["Bakir, Mete"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-09-16T17:12:43Z","2016-09-22T20:59:15Z","2014-08","2014-09-16"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Quantitave Viscoelastic Spectroscopy","Nanomechanical Characterization","Block Copolymers Morphologies","Multi-Frequency Atomic Force Microscopy (AFM)","Cantilever Mathematical Modelling","Contact Resonance Atomic Force Microscopy (AFM)"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2014 Mete Bakir"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/50413"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Embargo set by: Seth Robbins for item 50524 Lift date: 2016-09-16T17:13:01Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited Restriction Lifted for Item 50524 on 2016-09-22T20:59:15Z.","This thesis presents development of a material metrology technique, which is shown to quantify viscoelastic properties of a polymer film within the glass transition region. Designed for nanoscale material characterization applications, heater integrated atomic force microscopy (AFM) cantilever operates in contact resonance mode actuated by externally induced Lorentz force. It is demonstrated that glass transition temperature (Tg) of polymethyl methacrylate (PMMA) film can be detected reproducibly by monitoring contact resonance frequency of the cantilever as a function of temperature. Also, the glass transition temperature is observed in the terms of differential change of cantilever electrical resistance and differential power consumption. Furthermore, employing a harmonic oscillator model to define tip-sample contact interactions, viscoelastic properties of contact stiffness, viscous damping coefficient and elastic modulus for the polymer film are measured as functions of temperature. In addition, multi-frequency actuation for contact resonance is demonstrated providing qualitative material properties. Besides, a mathematical approach is developed to model two-leg and V-shaped LCR cantilevers as in the form of rectangular beam. Finally, local viscoelastic measurements taken on 66-63K PS-PMMA lamellar block copolymer film are presented. Also, nanomechanical surface property mappings of both 37-37K PS-PMMA lamellar and 46-21K PS-PMMA cylindrical block copolymer morphologies are provided. The technique introduced in this work has vast potential to be employed for numerous nano-scale material applications, and eventually replace traditional macro-scale thermophysical material characterization technologies providing local, reproducible and non-destructive analyses.","Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2014-07-22T22:12:08Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Bakir_Mete.pdf: 3026697 bytes, checksum: 5b8acc886f95dfdc591d62a074f7df57 (MD5)","Made available in DSpace on 2014-09-16T17:12:43Z (GMT). No. of bitstreams: 2 Mete_Bakir.pdf: 3026762 bytes, checksum: 5ef7f547c910eceffd01eb3b5d6c84b9 (MD5) license.txt: 4058 bytes, checksum: a8430874e783cd5e63bdb7fa553945c9 (MD5)"]},{"key":"dc:title","label":"Title","values":["Quantitative viscoelastic spectroscopy of polymer films using Lorentz force actuated contact resonance atomic force microscopy"]}]}],"canonical_facts":{"dc:contributor":["King, William P."],"dc:creator":["Bakir, Mete"],"dc:date":["2014-09-16T17:12:43Z","2016-09-22T20:59:15Z","2014-08","2014-09-16"],"dc:description":["Embargo set by: Seth Robbins for item 50524 Lift date: 2016-09-16T17:13:01Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited Restriction Lifted for Item 50524 on 2016-09-22T20:59:15Z.","This thesis presents development of a material metrology technique, which is shown to quantify viscoelastic properties of a polymer film within the glass transition region. Designed for nanoscale material characterization applications, heater integrated atomic force microscopy (AFM) cantilever operates in contact resonance mode actuated by externally induced Lorentz force. It is demonstrated that glass transition temperature (Tg) of polymethyl methacrylate (PMMA) film can be detected reproducibly by monitoring contact resonance frequency of the cantilever as a function of temperature. Also, the glass transition temperature is observed in the terms of differential change of cantilever electrical resistance and differential power consumption. Furthermore, employing a harmonic oscillator model to define tip-sample contact interactions, viscoelastic properties of contact stiffness, viscous damping coefficient and elastic modulus for the polymer film are measured as functions of temperature. In addition, multi-frequency actuation for contact resonance is demonstrated providing qualitative material properties. Besides, a mathematical approach is developed to model two-leg and V-shaped LCR cantilevers as in the form of rectangular beam. Finally, local viscoelastic measurements taken on 66-63K PS-PMMA lamellar block copolymer film are presented. Also, nanomechanical surface property mappings of both 37-37K PS-PMMA lamellar and 46-21K PS-PMMA cylindrical block copolymer morphologies are provided. The technique introduced in this work has vast potential to be employed for numerous nano-scale material applications, and eventually replace traditional macro-scale thermophysical material characterization technologies providing local, reproducible and non-destructive analyses.","Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2014-07-22T22:12:08Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Bakir_Mete.pdf: 3026697 bytes, checksum: 5b8acc886f95dfdc591d62a074f7df57 (MD5)","Made available in DSpace on 2014-09-16T17:12:43Z (GMT). No. of bitstreams: 2 Mete_Bakir.pdf: 3026762 bytes, checksum: 5ef7f547c910eceffd01eb3b5d6c84b9 (MD5) license.txt: 4058 bytes, checksum: a8430874e783cd5e63bdb7fa553945c9 (MD5)"],"dc:identifier":["http://hdl.handle.net/2142/50413"],"dc:language":["en"],"dc:rights":["Copyright 2014 Mete Bakir"],"dc:subject":["Quantitave Viscoelastic Spectroscopy","Nanomechanical Characterization","Block Copolymers Morphologies","Multi-Frequency Atomic Force Microscopy (AFM)","Cantilever Mathematical Modelling","Contact Resonance Atomic Force Microscopy (AFM)"],"dc:title":["Quantitative viscoelastic spectroscopy of polymer films using Lorentz force actuated contact resonance atomic force microscopy"],"dc:type":["text"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:40Z"}