Oleksandr Tkach

Additive Manufacturing for Smart Plastics (AM4SP)

ParticipanteIndustry National

BioMEMs Avançados para Engenharia de Tecidos: Aplicações em Tecidos Duros (BioMEMs)

ParticipanteFundação para a Ciência e a Tecnologia

Materiais flexíveis piezoelétricos de alto desempenho preparados utilizando grafite porosa organizada para sensores e geração de energia (PIEZOFLEX)

ParticipanteFundação para a Ciência e a Tecnologia

Multiferroicos e magnetoeléctricos para spintrónica: barreiras e interfaces (PTDC/CTM/099415/2008)

ParticipanteFundação para a Ciência e a Tecnologia

Multifunctional all-oxide heterostructures for electronic applications (IF/00602/2013/CP1162/CT0015)

CoordenadorFundação para a Ciência e a Tecnologia

Comment on Hole-pinned defect-dipoles induced colossal permittivity in Bi doped SrTiO3 ceramics with Sr deficiency

Tkach, A; Okhay, O
2021, JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 65, 151-153.

Comment on Point defect structure of La-doped SrTiO3 ceramics with colossal permittivity

Tkach, A; Okhay, O
2021, SCRIPTA MATERIALIA, 190, 38-39.
ISBN: 1872-8456

Polar Phonon Behaviour in Polycrystalline Bi-Doped Strontium Titanate Thin Films

Tkach, A; Okhay, O; Nuzhnyy, D; Petzelt, J; Vilarinho, PM
2021, MATERIALS, 14, 21.
ISBN: 1996-1944

Barium Strontium Titanate Thick Films for Tunable Software-Defined Radio Front-Ends

Patrícia Bouça, Ricardo Figueiredo, Anna Włódarkiewicz, Alexander Tkach, João Nuno Matos, Paula M. Vilarinho, Nuno Borges de Carvalho
2021, IEEE MTT-S International Microwave Symposium.

Comment on Giant dielectric response in (Nb plus Zn) co-doped strontium titanate ceramics tailored by atmosphere

Tkach, A; Okhay, O
2020, SCRIPTA MATERIALIA, 185, 19-20.

Long term durability of solid-state supercapacitor based on reduced graphene oxide aerogel and carbon nanotubes composite electrodes

Okhay, O; Tkach, A; Staiti, P; Lufrano, F
2020, ELECTROCHIMICA ACTA, 353.
ISBN: 1873-3859

Spark plasma texturing: A strategy to enhance the electro-mechanical properties of lead-free potassium sodium niobate ceramics

Pinho, R; Tkach, A; Zlotnik, S; Costa, ME; Noudem, J; Reaney, IM; Vilarinho, PM
2020, APPLIED MATERIALS TODAY, 19.

Energy storage of supercapacitor electrodes on carbon cloth enhanced by graphene oxide aerogel reducing conditions

Olena Okhay, Alexander Tkach, Maria J. Hortiguela Gallo, Gonzalo Otero-Irurueta, Sergey Mikhalev, Pietro Staiti, Francesco Lufrano
2020, JOURNAL OF ENERGY STORAGE, 32.

SrTiO3-Glimpses of an Inexhaustible Source of Novel Solid State Phenomena

Wolfgang Kleemann , Jan Dec, Alexander Tkach, Paula M. Vilarinho
2020, CONDENSED MATTER, 5, 4.

New Insights into the Effect of Nonstoichiometry on the Electric Response of Strontium Titanate Ceramics

Amaral, L; Tkach, A; Vilarinho, PM; Senos, AMR
2019, JOURNAL OF PHYSICAL CHEMISTRY C, 123, 1, 710-718.

Strontium Titanate: Synthesis, Properties and Uses

Tkach, A; Vilarinho, PM
2019, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

Metal Oxide Based Thermoelectric Materials

In Vijay Kumar, Irfan Ayoub, Vishal Sharma, Hendrik C. Swart (Eds.), Optical Properties of Metal Oxide Nanostructures
Olena Okhay and Alexander Tkach
2023, 399-430, Singapore , Springer Nature Singapore Pte Ltd..
ISBN: 978-981-99-5639-5

Metal Oxide Based Thermoelectric Materials

In Kumar, V., Ayoub, I., Sharma, V., Swart, H.C. (Eds.), Optical Properties of Metal Oxide Nanostructures
Okhay O.; Tkach A.
2023, Progress in Optical Science and Photonics, 26, 399-430, Springer.
ISBN: 978-981-99-5640-1

Antiferrodistortive phase transition in doped strontium titanate ceramics: the role of the perovskite lattice vacancies

In J. Clabel and V. Rivera (Eds.), Perovskite Ceramics
Alexander Tkach
2022, 77-98, Elsevier.
ISBN: 978-0-323-90586-2

Nonstoichiometry Role on the Properties of Quantum-Paraelectric Ceramics

In Tanasescu, S. (Eds.), Structure Processing Properties Relationships in Stoichiometric and Nonstoichiometric Oxides
Tkach, A; Vilarinho, PM
2020, London, IntechOpen.
ISBN: 978-1-78985-452-7

Strain effect on the properties of polar dielectric thin films

In Alexander Pogrebnjak and Valentin Novosad (Eds.), Advances in Thin Films, Nanostructured Materials, and Coatings
Tkach, A; Okhay, O; Santos, A; Zlotnik, S; Serrazina, R; Vilarinho, PM; Costa, ME
2019, 331-342, Springer Nature Singapore Pte Ltd.
ISBN: 978-981-13-6132-6

Sr/Ti ratio in strontium titanate ceramics: designing the microstructure, envisaging the properties

In Alexander Tkach and Paula Vilarinho (Eds.), Strontium Titanate: Synthesis, Properties and Uses
Amaral, L; Tkach, A; Vilarinho, PM; Senos, AMR
2019, 71-100, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

Effect of bismuth doping on the properties of strontium titanate thin films

In Alexander Tkach and Paula Vilarinho (Eds.), Strontium Titanate: Synthesis, Properties and Uses
Okhay, O; Tkach, A; Vilarinho, PM
2019, 209-258, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

Enhancement of thermoelectric performance in SrTiO3-based ceramics by processing conditions

In Alexander Tkach and Paula Vilarinho (Eds.), Strontium Titanate: Synthesis, Properties and Uses
Tkach, A; Resende, J; Diaz-Chao, P; Guilmeau, E; Costa, ME; Vilarinho, PM
2019, 297-322, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

Functional Tantalum-based Oxides: From the Structure to the Applications

In Ashutosh Tiwari, Rosario A. Gerhardt andMagdalena Szutkowska (Eds.), Advanced Ceramic Materials
S. Zlotnik, A. Tkach, P. M. Vilarinho
2016, 337-283, John Wiley & Sons, Inc.
ISBN: 978-1-119-24244-4

Strontium Titanate: Synthesis, Properties and Uses

Tkach, A; Vilarinho, PM
2019, New York, Nova Science Publishers, Inc.
ISBN: 978-1-53615-437-5

Hydrothermal Synthesis of Barium Titanate Nanoparticles: The Effect of the Heating System

F. Sá, M. Silva, M. Ivanov, A. Tkach, P.M. Vilarinho, P. Ferreira
2022, Materials Proceedings, 14, 1-4.
ISBN: 978-1-6654-6831-2