Academic Research
Major Contributions to Science and Technology
Major Contributions to Science and Technology
- DARPA and GE Global Research sponsored R&D project: Nanostructured GLAD (Glancing Angle Deposition) based thermal interfaces for heat sink electronics
Developed experimental setups, specialized measurement systems, user interfaces and test protocols for tensile, shear and torsional testing and mechanical/chemical reliability assessment of GLAD-based Cu nanospring interfaces and Cu, Cu2O, CuO nanowires pursued for advanced thermal management and compliant interconnect applications for integrated microelectronics. Listed below are the thesis and peer-reviewed research papers to this contribution.
Developed experimental setups, specialized measurement systems, user interfaces and test protocols for tensile, shear and torsional testing and mechanical/chemical reliability assessment of GLAD-based Cu nanospring interfaces and Cu, Cu2O, CuO nanowires pursued for advanced thermal management and compliant interconnect applications for integrated microelectronics. Listed below are the thesis and peer-reviewed research papers to this contribution.
· Ozkan T, Shaddock D, Lipkin DM, Chasiotis I. Mechanical strengthening, stiffening, and oxidation behavior of pentatwinned Cu nanowires at near ambient temperatures. Materials Research Express. 2014 Jul 25;1(3):035020.
· Ozkan T, Shaddock D, Lipkin DM, Chasiotis I. Mechanical strengthening, stiffening, and oxidation behavior of pentatwinned Cu nanowires at near ambient temperatures. Materials Research Express. 2014 Jul 25;1(3):035020.
· Ozkan T, Mechanical behavior and environmental stability of GLAD-based Cu nanospring films. University of Illinois at Urbana-Champaign, ProQuest Dissertations Publishing, 2014. 3646600.
· Ozkan T, Mechanical behavior and environmental stability of GLAD-based Cu nanospring films. University of Illinois at Urbana-Champaign, ProQuest Dissertations Publishing, 2014. 3646600.
· Ozkan T, Chen Q, Chasiotis I. Standardization of Nanoscale Interfacial Experiments Using MEMS. In MEMS and Nanotechnology, Volume 2 2014 (pp. 75-79). Springer New York.
· Ozkan T, Chen Q, Chasiotis I. Standardization of Nanoscale Interfacial Experiments Using MEMS. In MEMS and Nanotechnology, Volume 2 2014 (pp. 75-79). Springer New York.
2. NSF Research Project: HfB2 based ultra-hard thin film coatings for tribological optimization Experimental outcomes of the completed research on oxidation kinetics and corrosion resistance of HfB2 and HfBxCy thin film coatings paved the way for a thorough understanding of coupled chemical-microstructural-mechanical phenomena occurring at the particular scale of these thin films from both process engineering and thin film growth technology integration perspectives. Unprecedented constitutive response models for ultra-hard materials with intrinsic nanoporosity are another major accomplishment of this project. We published following research papers with the knowledge generated within the scope of this project:
2. NSF Research Project: HfB2 based ultra-hard thin film coatings for tribological optimization Experimental outcomes of the completed research on oxidation kinetics and corrosion resistance of HfB2 and HfBxCy thin film coatings paved the way for a thorough understanding of coupled chemical-microstructural-mechanical phenomena occurring at the particular scale of these thin films from both process engineering and thin film growth technology integration perspectives. Unprecedented constitutive response models for ultra-hard materials with intrinsic nanoporosity are another major accomplishment of this project. We published following research papers with the knowledge generated within the scope of this project:
· Mohimi E, Ozkan T, Babar S, Polycarpou AA, Abelson JR. Conformal growth of low friction HfB x C y hard coatings. Thin Solid Films. 2015 Oct 1;592:182-8.
· Mohimi E, Ozkan T, Babar S, Polycarpou AA, Abelson JR. Conformal growth of low friction HfB x C y hard coatings. Thin Solid Films. 2015 Oct 1;592:182-8.
· Ozkan T, Demirkan MT, Walsh KA, Karabacak T, Polycarpou AA. Density modulated nanoporous tungsten thin films and their nanomechanical properties. Journal of Materials Research. 2016 Jul 28;31(14):2011-24.
· Ozkan T, Demirkan MT, Walsh KA, Karabacak T, Polycarpou AA. Density modulated nanoporous tungsten thin films and their nanomechanical properties. Journal of Materials Research. 2016 Jul 28;31(14):2011-24.
· Mohimi E, Ozkan T, Babar S, Polycarpou AA, Abelson JR. Conformal growth of low friction HfBxCy hard coatings. Thin Solid Films. 592, 182-188
· Mohimi E, Ozkan T, Babar S, Polycarpou AA, Abelson JR. Conformal growth of low friction HfBxCy hard coatings. Thin Solid Films. 592, 182-188
3. TAMU Department of Disability Project: 3D Printing for braille differentiation on consumer products
3. TAMU Department of Disability Project: 3D Printing for braille differentiation on consumer products
We developed a unique FDM type 3D Printer for generating Braille characters on product packages. We made the special extruder system and polymer nanocomposite filament development IP available in the public domain. These efforts have been recognized by the Louis Braille Touch of Genius Prize for Innovation committee. Papers/presentations related to this project:
We developed a unique FDM type 3D Printer for generating Braille characters on product packages. We made the special extruder system and polymer nanocomposite filament development IP available in the public domain. These efforts have been recognized by the Louis Braille Touch of Genius Prize for Innovation committee. Papers/presentations related to this project:
· Presentation: 3D Printing for Braille Labeling (Accessibility and Assistive Technologies Conference, TAMU, College Station, 2017)
· Presentation: 3D Printing for Braille Labeling (Accessibility and Assistive Technologies Conference, TAMU, College Station, 2017)
· In preparation: Substrate free 3D printing by means of an integrated IR sensor to printhead (3D Printed Materials Systems)
· In preparation: Substrate free 3D printing by means of an integrated IR sensor to printhead (3D Printed Materials Systems)
4. U.S. Air Force Office of Scientific Research sponsored R&D project: Mechanical characterization and polymer nanocomposite properties of vapor grown carbon nanofiber
4. U.S. Air Force Office of Scientific Research sponsored R&D project: Mechanical characterization and polymer nanocomposite properties of vapor grown carbon nanofiber
I developed individual carbon nanofiber level specimen preparation techniques and implemented unique test protocols for uniaxial tensile and pull-out testing of vapor grown carbon nanofibers using MEMS based mechanical test platforms with nanoNewton (nN) force resolution. My experimental results unraveled the processing-structure-property relationships and the effects of surface functionalization for vapor grown carbon nanofibers increasingly utilized by aerospace, automotive and battery industries due to their inherent multifunctionality benefits such as substantial fracture toughening, tailored electrical conductivity, radar signature and ultra-dense electrochemical energy storage. Experimental findings of this project along with the semi-empirical pull-out fracture energy model I developed culminated in three frequently cited journal publications in Carbon, Journal of Micromechanics and Microengineering and Composites Science and Technology:
I developed individual carbon nanofiber level specimen preparation techniques and implemented unique test protocols for uniaxial tensile and pull-out testing of vapor grown carbon nanofibers using MEMS based mechanical test platforms with nanoNewton (nN) force resolution. My experimental results unraveled the processing-structure-property relationships and the effects of surface functionalization for vapor grown carbon nanofibers increasingly utilized by aerospace, automotive and battery industries due to their inherent multifunctionality benefits such as substantial fracture toughening, tailored electrical conductivity, radar signature and ultra-dense electrochemical energy storage. Experimental findings of this project along with the semi-empirical pull-out fracture energy model I developed culminated in three frequently cited journal publications in Carbon, Journal of Micromechanics and Microengineering and Composites Science and Technology:
· T Ozkan, M Naraghi, I Chasiotis. Mechanical properties of vapor grown carbon nanofibers. Carbon 48 (1), 239-244
· T Ozkan, M Naraghi, I Chasiotis. Mechanical properties of vapor grown carbon nanofibers. Carbon 48 (1), 239-244
· M Naraghi, T Ozkan, I Chasiotis, SS Hazra, MP De Boer, MEMS platform for on-chip nanomechanical experiments with strong and highly ductile nanofibers. Journal of Micromechanics and Microengineering 20 (12), 125022
· M Naraghi, T Ozkan, I Chasiotis, SS Hazra, MP De Boer, MEMS platform for on-chip nanomechanical experiments with strong and highly ductile nanofibers. Journal of Micromechanics and Microengineering 20 (12), 125022
· T Ozkan, Q Chen, I Chasiotis. Interfacial strength and fracture energy of individual carbon nanofibers in epoxy matrix as a function of surface conditions. Composites Science and Technology 72 (9), 965-975
· T Ozkan, Q Chen, I Chasiotis. Interfacial strength and fracture energy of individual carbon nanofibers in epoxy matrix as a function of surface conditions. Composites Science and Technology 72 (9), 965-975