Publications

Our publications span quantum-dot and polymer systems, mechanics and reliability, additive manufacturing, data- and model-guided materials research, and engineering education.

Current as of July 2026.

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Research

Selected publications

These six papers connect the current program in quantum-dot/polymer systems and cryogenic materials with its experimental and reliability foundations.

Multiscale GQD–epoxy/carbon-fiber composite design

S. S. Bamane and Ö. Keleş, “Multi-scale modeling of hierarchical hybrid graphene quantum dot – epoxy/carbon fiber composite,” Computational Materials Science 271 (2026) 114826. DOI

Connects atomistic GQD–epoxy predictions to composite-scale micromechanics and identifies experimentally testable formulations.

Surface chemistry of GQD–epoxy interfaces

S. S. Bamane, P. P. Deshpande, F. Erogbogbo, and Ö. Keleş, “Enhancing the mechanical properties of epoxy with graphene quantum dots: a molecular dynamics study,” RSC Applied Polymers 4 (2026) 753–766. DOI · Open data

Compares chemistry-specific GQD–epoxy models and provides a reproducible basis for selecting experimental candidates.

Polymers for cryogenic environments

S. S. Bamane, S. Patil, K. Kashmari, B. D. Jensen, B. A. Bednarcyk, E. J. Pineda, J. Hinkley, Ö. Keleş, J. H. Kang, and G. M. Odegard, “Investigation of material properties of thermoplastic and thermoset polymer materials at cryogenic temperatures using molecular dynamics,” Materials & Design 263 (2026) 115689. DOI

Compares multiple thermoplastic and thermoset systems across cryogenic conditions to support material screening for demanding low-temperature applications.

Bio-derived PHB–fatty-acid–PMMA copolymers

B. Hazer, Ö. Keleş, and E. Kılıçay, “Synthesis and characterization of branched multiblock copolymers of polyhydroxybutyrate (PHB) autoxidized fatty acid and polymethylmethacrylate (PMMA),” Scientific Reports 15 (2025) 32084. DOI

Demonstrates synthesis and characterization of a branched multiblock-copolymer architecture derived from PHB and autoxidized fatty acids.

Carbon- and graphene-quantum-dot formation

A. Bokare, D. Nordlund, C. Melendrez, R. Robinson, Ö. Keleş, A. Wolcott, and F. Erogbogbo, “Surface functionality and formation mechanisms of carbon and graphene quantum dots,” Diamond and Related Materials 110 (2020) 108101. DOI

Establishes an experimental foundation for connecting quantum-dot formation routes with surface chemistry.

Reliability of additively manufactured porous composites

Ö. Keleş, E. H. Anderson, J. Huynh, J. Gelb, J. Freund, and A. Karakoç, “Stochastic fracture of additively manufactured porous composites,” Scientific Reports 8 (2018) 15437. DOI

Quantifies how manufacturing-induced porosity affects stochastic fracture and mechanical reliability.

Journal articles

2026

  1. S. S. Bamane and Ö. Keleş, “Multi-scale modeling of hierarchical hybrid graphene quantum dot – epoxy/carbon fiber composite,” Computational Materials Science 271 (2026) 114826. DOI
  2. S. S. Bamane, S. Patil, K. Kashmari, B. D. Jensen, B. A. Bednarcyk, E. J. Pineda, J. Hinkley, Ö. Keleş, J. H. Kang, and G. M. Odegard, “Investigation of material properties of thermoplastic and thermoset polymer materials at cryogenic temperatures using molecular dynamics,” Materials & Design 263 (2026) 115689. DOI
  3. S. S. Bamane, P. P. Deshpande, F. Erogbogbo, and Ö. Keleş, “Enhancing the mechanical properties of epoxy with graphene quantum dots: a molecular dynamics study,” RSC Applied Polymers 4 (2026) 753–766. DOI · Data

2025

  1. S. S. Bamane and Ö. Keleş, “Effects of graphene quantum dots on thermal properties of epoxy using molecular dynamics,” Applied Nano 6 (2025) 15. DOI
  2. B. Hazer, Z. Karahaliloglu, and Ö. Keleş, “Synthesis and characterization of a novel membrane based on poly(2-ethyl oxazoline) and poly(propylene) graft copolymer for potential food packaging and medical applications,” ACS Omega 10 (2025) 34227–34237. DOI
  3. B. Hazer, Ö. Keleş, and E. Kılıçay, “Synthesis and characterization of branched multiblock copolymers of polyhydroxybutyrate (PHB) autoxidized fatty acid and polymethylmethacrylate (PMMA),” Scientific Reports 15 (2025) 32084. DOI
  4. B. Hazer and Ö. Keleş, “Comparison of the macro chain transfer agent and the macro azo initiator based on poly(3-hydroxybutyrate) in the polymerization kinetics of methyl methacrylate,” ACS Omega 10 (2025) 6814–6826. DOI
  5. P. P. Deshpande, R. Chan-Jobe, J. Kemppainen, G. M. Odegard, and Ö. Keleş, “Optimizing epoxy nanocomposites with oxidized graphene quantum dots for superior mechanical performance: a molecular dynamics approach,” ACS Omega 10 (2025) 14209–14220. DOI

2024

  1. Ö. Keleş, E. H. Anderson, T. L. Tan, C.-L. Wu, and A. Karakoç, “Enhanced strength, toughness and reliability in crab exoskeleton–inspired 3D-printed porous thermoplastics,” Rapid Prototyping Journal 30 (2024) 1756–1768. DOI
  2. P. P. Deshpande, R. Chan-Jobe, and Ö. Keleş, “Molecular structure data and modelling roadmap for optimized oxidized graphene quantum dot and epoxy interface and mechanical properties,” Data in Brief 57 (2024) 111059. DOI
  3. Ö. Keleş and P. P. Deshpande, “Mechanical behavior of graphene quantum dot epoxy nanocomposites: a molecular dynamics study,” Materials Letters 362 (2024) 136206. DOI
  4. P. P. Deshpande and Ö. Keleş, “Simulation data for engineering graphene quantum dot epoxy nanocomposites using molecular dynamics,” Data in Brief 53 (2024) 110169. DOI · Data

2023

  1. Ö. Keleş, V. Brubaker-Gianakos, V. Viswanathan, and F. Marbouti, “Experiential learning of engineering concepts in immersive virtual learning environments (VLEs),” Journal of STEM Education: Innovations and Research 24(2) (2023) 5–13. Publisher

2022

  1. J. Dei Rossi, Ö. Keleş, and V. Viswanathan, “Fused deposition modeling with induced vibrations: a study on the mechanical characteristics of printed parts,” Applied Sciences 12 (2022) 9327. DOI
  2. S. S. G. Iyer and Ö. Keleş, “Effect of raster angle on mechanical properties of 3D printed short carbon fiber reinforced acrylonitrile butadiene styrene,” Composites Communications 32 (2022) 101163. DOI

2021

  1. C. M. Fancher, Ö. Keleş, M. C. Ehmke, and K. J. Bowman, “Temperature dependence of field-response mechanisms in 0.4Ba(Zr0.2Ti0.8)O3–0.6(Ba0.7Ca0.3)TiO3,” Applied Physics Letters 119 (2021) 022904. DOI
  2. S. Luke, D. Soares, J. Marshall, J. Shedden, and Ö. Keleş, “Effect of fiber content and fiber orientation on mechanical behavior of fused filament fabricated continuous-glass-fiber-reinforced nylon,” Rapid Prototyping Journal 27 (2021) 1346–1354. DOI
  3. Ö. Keleş, Y. He, and B. Sirkeci-Mergen, “Prediction of elastic stresses in porous materials using fully convolutional networks,” Scripta Materialia 197 (2021) 113805. DOI
  4. A. K. Cress, J. Huynh, E. H. Anderson, R. O’Neill, Y. Schneider, and Ö. Keleş, “Effect of recycling on the mechanical behavior and structure of additively manufactured acrylonitrile butadiene styrene (ABS),” Journal of Cleaner Production 279 (2021) 123689. DOI

2020

  1. A. Bokare, D. Nordlund, C. Melendrez, R. Robinson, Ö. Keleş, A. Wolcott, and F. Erogbogbo, “Surface functionality and formation mechanisms of carbon and graphene quantum dots,” Diamond and Related Materials 110 (2020) 108101. DOI
  2. A. Karakoç and Ö. Keleş, “A predictive failure framework for brittle porous materials via machine learning and geometric matching methods,” Journal of Materials Science 55 (2020) 4734–4747. DOI
  3. J. R. Seibert, Ö. Keleş, J. Wang, and F. Erogbogbo, “Data on thermal conductivity and dynamic mechanical properties of graphene quantum dots in epoxy,” Data in Brief 28 (2020) 105008. DOI

2019

  1. J. R. Seibert, Ö. Keleş, J. Wang, and F. Erogbogbo, “Infusion of graphene quantum dots to modulate thermal conductivity and dynamic mechanical properties of polymers,” Polymer 185 (2019) 121988. DOI
  2. P. Pokharel, D. Xiao, F. Erogbogbo, Ö. Keleş, and D.-S. Lee, “A hierarchical approach for creating electrically conductive network structure in polyurethane nanocomposites using a hybrid of graphene nanoplatelets, carbon black and multi-walled carbon nanotubes,” Composites Part B: Engineering 161 (2019) 169–182. DOI

2018

  1. Ö. Keleş, E. H. Anderson, J. Huynh, J. Gelb, J. Freund, and A. Karakoç, “Stochastic fracture of additively manufactured porous composites,” Scientific Reports 8 (2018) 15437. DOI
  2. Ö. Keleş, J. Huynh, and E. H. Anderson, “Mechanical reliability of short carbon fiber reinforced ABS produced via vibration-assisted fused deposition modeling,” Rapid Prototyping Journal 24 (2018) 1572–1578. DOI

2017

  1. N. Gobi, D. Vijayakumar, Ö. Keleş, and F. Erogbogbo, “Infusion of graphene quantum dots to create stronger, tougher, and brighter polymer composites,” ACS Omega 2 (2017) 4356–4362. DOI
  2. Ö. Keleş, C. W. Blevins, and K. J. Bowman, “Effect of build orientation on the mechanical reliability of 3D printed ABS,” Rapid Prototyping Journal 23 (2017) 320–328. DOI
  3. Ö. Keleş, R. E. García, and K. J. Bowman, “Sensitivity of fracture strength in porous glass,” International Journal of Applied Glass Science 8 (2017) 116–123. DOI
  4. P. C. Boylan-Ashraf, S. A. Freeman, M. C. Shelley, and Ö. Keleş, “Can students flourish in engineering classrooms?” Journal of STEM Education: Innovations and Research 18(1) (2017) 16–24. Publisher

2015

  1. Ö. Keleş, N. P. Barcenas, D. H. Sprys, and K. J. Bowman, “Effect of porosity on strength distribution of microcrystalline cellulose,” AAPS PharmSciTech 16 (2015) 1455–1464. DOI

2014

  1. Ö. Keleş, R. E. García, and K. J. Bowman, “Failure variability in porous glasses: stress interactions, crack orientation, and crack size distributions,” Journal of the American Ceramic Society 97 (2014) 3967–3972. DOI
  2. Ö. Keleş, R. E. García, and K. J. Bowman, “Pore–crack orientation effects on fracture behavior of brittle porous materials,” International Journal of Fracture 187 (2014) 293–299. DOI

2013

  1. Ö. Keleş, R. E. García, and K. J. Bowman, “Deviations from Weibull statistics in brittle porous materials,” Acta Materialia 61 (2013) 7207–7215. DOI
  2. Ö. Keleş, R. E. García, and K. J. Bowman, “Stochastic failure of isotropic, brittle materials with uniform porosity,” Acta Materialia 61 (2013) 2853–2862. DOI

The two 2013 Acta Materialia papers have 2014 corrigenda: stochastic failure and deviations from Weibull statistics. The corrigenda are linked for record integrity.

Conference proceedings and book chapters

  1. Ö. Keleş, “Capability compression and combinatorial creativity: how software-defined manufacturing bypasses the network dependence of complex innovation,” extended abstract and conference presentation, Conference on Economic Complexity 2026, Yıldız Technical University, Istanbul, Türkiye, July 9, 2026. Official program
  2. P. P. Deshpande and Ö. Keleş, “Investigating effects of oxidation of graphene quantum-dot in epoxy composites—A molecular dynamics study,” in Performance and Durability of Composite Materials: Proceedings of the American Society for Composites 39th Technical Conference, Volume 2 (Springer, 2026), pp. 179–187. DOI
  3. S. S. Bamane and Ö. Keleş, “Tailoring mechanical and thermal properties of epoxy via graphene quantum dots: a molecular dynamics study,” American Society for Composites 40th Technical Conference, Dayton, Ohio, October 6–8, 2025. Conference archive
  4. P. P. Deshpande and Ö. Keleş, “Effect of graphene quantum dots on the mechanical properties of bisphenol F-based epoxy,” Proceedings of the American Society for Composites 38th Annual Technical Conference (2023), pp. 1857–1863. DOI
  5. B. P. Croom, M. Flores, D. Rapking, Ö. Keleş, and J. Degery, “Prediction of crack propagation along non-uniform raster patterns in AM composites,” Proceedings of the American Society for Composites—35th Technical Conference (2020), pp. 85–96. DOI
  6. J. Dei Rossi, Ö. Keleş, and V. Viswanathan, “Fused deposition modeling with added vibrations: a parametric study on the accuracy of printed parts,” Proceedings of the ASME 2019 International Mechanical Engineering Congress and Exposition (2020), V02AT02A060. DOI
  7. Ö. Keleş and E. H. Anderson, “Mechanical reliability of fused deposition modeled polymers and composites,” TechConnect Briefs 4 (2018) 126–129. Publisher
  8. S. Swaminathan, T. Shah, B. Sirkeci-Mergen, and Ö. Keleş, “Machine learning models for predicting fracture strength of porous ceramics and glasses,” Proceedings of the 2018 International Conference on Data Science (ICDATA’18), CSREA Press (2018), pp. 147–150. ISBN 978-1-60132-481-8. Proceedings archive

Preprints

  1. K. Kozan, Ö. Keleş, S. Jian, S. Ayvaz, K. Sierszecki, and S. Joo, “GenAI integration into engineering education: a case study of an introductory undergraduate engineering course,” arXiv 2603.13269 (2026). DOI
  2. R. Padilla and Ö. Keleş, “Immersive virtual reality environments for embodied learning of engineering students,” arXiv 2503.16519 (2025). DOI