Physics of Dielectrics
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PhD Students
Research
The Advanced Dielectrics Research Group specializes in investigating the dielectric and thermodynamic properties of hybrid organic-inorganic materials, liquids, and ceramics. Our research employs techniques such as Differential Scanning Calorimetry (DSC), Broadband Dielectric Spectroscopy (BDS), pyroelectric current measurements, and ferroelectric hysteresis loop analysis.
Our primary goal is to understand the mechanisms of phase transitions in the studied materials and to comprehensively characterize their dielectric properties. We focus on dipolar relaxation processes driven by the reorientational motions of molecular dipoles, as well as electrical conductivity arising from the translational movement of charge carriers.
By integrating experimental methods, we aim to deepen the understanding of structural phase transitions and dielectric behavior in various materials, thus contributing to the advancement of experimental physics and materials engineering.
Differential Scanning Calorimetry
Model: Mettler Toledo DSC 1 and DSC 3
Applications: crystallization, glass transition, heat capacity, kinetics
Temperature range: -150 °C – 500 °C
Sensor output: Heat Flow
Sensitivity: 0.1mW
Samples: solid state, liquid
Broadband Dielectric Spectroscopy (BDS)
Model: Novocontrol Technologies Alpha-A analyzer
Temperature controller: Novo-Control Quattro system
Temperature range: -150 °C – 500 °C optional -240 °C – 300 °C
Frequency range: 1Hz – 1MHz
Samples: solid state (single crystal, polycrystal, composite), liquid
Ferroelectric Tester
Model: Precision Premier II
Temperature range: -200 °C – 500 °C
Maximum voltage: 500 V
Frequency range: 0.03 Hz – 2 KHz
Sample: single crystal, thin film
Hand-made Pyroelectric Current Tester
Electrometer: Keithley 617
Current resolution: 0.1 pA
Temperature controller: MercuryiTC
Temperature range: -200 °C – 500 °C
Sample: solid state, thin film
2025
Excitonic anisotropy in single-crystalline 2D silver phenylchalcogenides
Woo Seok. Lee, Yeongsu Cho, Katarzyna Z. Posmyk, Paulina Peksa, Mateusz Ł. Dyksik, Nicholas Samulewicz, Paulina Płochocka, Michał Baranowski, Heather J. Kulik, William A. Tisdale
Advanced Optical Materials. 2025, vol. 13, nr 32, art. e02435, s. 1-13
Dion-Jacobson lead bromide perovskites with 1,4-Butanediammonium cations: lattice dynamics, phase transitions, dielectric switching, and optical properties
Mirosław Maczka, Dagmara Stefańska, Maciej Ptak, Anna Gągor, Katarzyna Fedoruk-Piskorska, Szymon Smółka, Jan K. Zaręba, Adam Sieradzki
Inorganic Chemistry. 2025. s. 1-18
Rotational flexibility in dication drives ambient temperature ferroelectricity in an organic–inorganic hybrid halide
Nahid Hassan, Rishukumar Panday, Prashanth G. Chandru, Kekkar S. Ananthram, Therese M. Jose, Umashis Bhoi, Adam Sieradzki, Jan K. Zaręba, Ramamoorthy Boomishankar, Kartick Tarafder, Nirmalya Ballav
Angewandte Chemie (International edition). 2025, vol. 64, nr 49, art. e202512104, s. 1-10
Tunable room-temperature polaritons in the very strong coupling regime in quasi-2D Ruddlesden-Popper perovskites
Hamid Pashaei. Adl, Christoph Bennenhei, Marti Struve, Paulina Peksa, Mateusz Ł. Dyksik, Michał Baranowski, Kok Wee. Song, Moritz Gittinger, Christoph Lienau, Jonas K. König, Jamie M. Fitzgerald, Naga Prathibha. Jasti, Falk Eilenberger, Paulina Płochocka, Ermin Malic, Oleksandr Kyriienko, Martin Esmann, Christian Schneider
Advanced Optical Materials. 2025, vol. 13, nr 30, s. 1-8
Ligand substitutional effects on molecular dynamics and broadband near-white emission in 2d 2-fluoroethylammonium cadmium chlorobromide
Maciej Ptak, Dorota Anna. Kowalska, Szymon Smółka, Mariusz Stefański, Julia Osmólska, Damian Szymański, Adam Sieradzki
Journal of Physical Chemistry C. 2025, vol. 129, nr 31, s. 14075-14087
Indications of ferroelectric behaviour near room temperature in the organic-inorganic hybrid Q2CuBr4
Agnieszka Ciżman, Dorota A. Kowalska, Paweł Szarek, Wojciech Medycki, Natalia A. Wójcik, Marek A. Gusowski, Monika Trzebiatowska, Adam Przemysław. Bartosiewicz, Liudmyla Filevska, Piotr Staniorowski, Ewelina K. Jach
Dalton Transactions. 2025, vol. 54, nr 42, s. 15816-15832
Effect of Rb+ co-doping on the optical properties in VIS and NIR emitting CsPbCl3:Yb3+ perovskite powder
Weronika Jagiełowicz, Bartosz Bondzior, Kamila Rajfur, Maciej Ptak, Mariusz Stefański
Dalton Transaction. 2025, vol. 54, nr 37, s. 14191-14198
Tunable broadband emission via self-trapped excitons and Mn2+ energy transfer in a 0D hybrid manganese bromide
Paulina Peksa-Jasińska, Maciej Ptak, Mateusz Ł. Dyksik, Alessandro Surrente, Michał Baranowski, Dawid Drozdowski, Anna Gągor, Julia Osmólska, Agnieszka Kuc, Adam Pikul, Daria Szewczyk, Paulina Płochocka, Adam Sieradzki
Small. 2025, vol. 21, nr 38, art. e04786, s. 1-11
A fresh perspective on the internal plasticizing effect in non-polymeric glass-formers
Andrzej K. Nowok, Hubert Hellwig, Piotr Kuś
Journal of Physical Chemistry B. 2025, vol. 129, nr 23, s. 5831-5841
Structural diversity and stability of organic-inorganic hybrid quinuclidine-based metal bromides
Ewelina K. Jach, Dorota A. Kowalska, Monika Trzebiatowska, Wojciech Medycki, Adam Ostrowski, Waldemar Bednarski, Marek A. Gusowski, Piotr Staniorowski, Adam Przemysław. Bartosiewicz, Urszula Dieu, Agnieszka Ciżman
Inorganic Chemistry. 2025, vol. 64, nr 15, s. 7422-7436
Effect of halide tuning on the structural, dielectric, and optical properties of two-dimensional 2-chloroethylammonium lead halides
Mirosław Mączka, Jan Kudrawiec, Katarzyna Fedoruk-Piskorska, Dagmara Stefańska, Anna Gągor, Marek Drozd, Szymon Smółka, Adam Sieradzki
Inorganic Chemistry. 2025, vol. 64, nr 9, s. 4501-4513
Near-bandgap emission in [HOC2H4NH3]2PbI4 perovskite under hydrostatic pressure: emission of a free exciton and a polaronic exciton
Filip Dybała, Robert Kudrawiec, Maciej P. Polak, Artur P. Herman, Adam Sieradzki, Mirosław Mączka
Materials Advances. 2025, vol. 6, nr 2, s. 467–872
New hybrid thiocyanates: Crystal structures, optical properties and unusual dielectric switching properties
Soulayma Mtar, Mirosław Mączka, Szymon Smółka, Maciej Ptak, Paweł Winkel, Anna Gągor, Adam Sieradzki, Mohamed Boujelbene
Inorganic Chemistry Communications. 2025, vol. 177, art. 114358, s. 1-8
Tailoring potential ferroelectric properties in conformationally switchable Er(III)-isothiocyanates using organic cation modulation
Rishukumar Panday, Dipti R. Naphade, Anirudh Sowmiyanarayanan, Balu Praveenkumar, Alexander Steiner, Adam Sieradzki, Jan K. Zaręba, Thomas D. Anthopoulos, Ramamoorthy Boomishankar
Chemistry of Materials. 2025, vol. 37, nr 8, s. 2889-2898
Temperature-dependent IR and dielectric properties, and DFT calculations (FMOs and ELF), of 2-amino-3-nitropyridinium hydrogen sulfate monohydrate
Soulayma Mtar, Mirosław Mączka, Szymon Smółka, Paulina Peksa, Adam Sieradzki, Sergiu Shova, Mohamed Boujelbene
Journal of Molecular Structure. 2025, vol. 1334, art. 141839, s. 1-11
2024
Near-bandgap emission in [HOC2 H 4NH3 ] 2 PbI4 perovskite under hydrostatic pressure: emission of a free exciton and a polaronic exciton
Filip Dybała, Robert Kudrawiec, Maciej P. Polak, Artur P. Herman, Adam Sieradzki and Mirosław Mączka
Mater. Adv., 2025, 6, 569
Mechanism of isosymmetric polar order-disorder phase transition in pyroelectric [CH3CH2NH3]2NaGa(HCOO)6 double perovskite
M. Ptak, A. Kabański, B. Dziuk, S. Balciunas, G. Usevicius, J. K. Zaręba, J. Banys, M. Simenas, A. Sieradzki, D. Stefańska
J Mater Chem C Mater 12, 4663–4675 (2024)