| Issue Date | Title | Author(s) | Type | Access Type |
| Dec-2023 | Chemical activation of apricot pit-derived carbon sorbents for the effective removal of dyes in environmental remediation | Vashchynskyi, Vitalii; Okhay, Olena; Boychuk, Tetiana | article |  |
| 14-Dec-2023 | Comment on “Enhancing the output performance of hybrid nanogenerators based on Al-doped BaTiO3 composite films: a self-powered utility system for portable electronics”, by B. Dudem, L. K. Bharat, H. Patnam, A. R. Mule and J. S. Yu, J. Mater. Chem. A, 2018, 6, 16101 | Tkach, Alexander; Okhay, Olena | article |  |
| 28-Feb-2021 | Comment on “Hole-pinned defect-dipoles induced colossal permittivity in Bi doped SrTiO3 ceramics with Sr deficiency” | Tkach, Alexander; Okhay, Olena | article | |
| 2015 | Drastic modification of graphene oxide properties by incorporation of nickel: a simple inorganic chemistry approach | Okhay, Olena; Krishna, Rahul; Tkach, Alexander; Klaeui, Mathias; Guerra, Luis M.; Ventura, Joo; Titus, Elby; Gracio, Jose J. A. | article | |
| 2015 | Electrical and Magnetic Properties of Graphene Films with Ni Nanoparticles | Okhay, Olena; Guerra, Luis M.; Ventura, Joao; Tkach, Alexander; Klaeui, Mathias; Krishna, Rahul; Titus, Elby | article | |
| 1-Feb-2022 | Low-Temperature Dielectric Response of Strontium Titanate Thin Films Manipulated by Zn Doping | Okhay, Olena; Vilarinho, Paula M.; Tkach, Alexander | article | |
| 24-Sep-2023 | Metal Oxide Based Thermoelectric Materials | Okhay, Olena; Tkach, Alexander | bookPart | |
| 17-Oct-2022 | Polyaniline—Graphene Electrodes Prepared by Electropolymerization for High-Performance Capacitive Electrodes: A Brief Review | Okhay, Olena; Tkach, Alexander | article | |
| 2-Feb-2022 | Reduced Graphene Oxide: Polycarbonate Electrodes on Different Supports for Symmetric Supercapacitors | Okhay, Olena; Bastos, Alexandre Cunha; Andreeva, Kateryna; Tuukkanen, Sampo; Tkach, Alexander | article | |
| 2009 | Strontium titanate based films for tunable device applications | Okhay, Olena | doctoralThesis | |
| Aug-2022 | Synergetic Effect of Polyaniline and Graphene in Their Composite Supercapacitor Electrodes: Impact of Components and Parameters of Chemical Oxidative Polymerization | Okhay, Olena; Tkach, Alexander | article | |
| 2016 | Thin film versus paper-like reduced graphene oxide: Comparative study of structural, electrical, and thermoelectrical properties | Okhay, Olena; Goncalves, Gil; Tkach, Alexander; Dias, Catarina; Ventura, Joao; Ribeiro da Silva, Manuel Fernando; Valente Goncalves, Luis Miguel; Titus, Elby | article | |