Jerzy Kubacki

University of Silesia in Katowice

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J. Szade

University of Silesia in Katowice

Katarzyna Balin

University of Silesia in Katowice

K. Szot

University of Silesia in Katowice

Dariusz Kajewski

Institute of Physics

DŁ

Dariusz Łukowiec

Silesian University of Technology

ᴌH

ᴌ. Hawełek

Łukasiewicz Research Network

Regina Dittmann

Forschungszentrum Jülich

Adrian Radoń

Łukasiewicz Research Network

Barbara Trzebicka

Centre of Polymer and Carbon Materials

Jerzy Goraus

University of Silesia in Katowice

Cooperative Institutions

University of Silesia in Katowice

Institute of Physics

Polish Academy of Sciences

Silesian University of Technology

Division of Materials Research

New York University Press

Cambridge University Press

Nanyang Technological University

Aerospace Research Institute of Materials and Processing Technology

Centre of Polymer and Carbon Materials

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Electronic structure of NaNbO3–Mn single crystals

Journal of Alloys and Compounds (2001)

Jerzy Kubacki A. Molak E. Talik

10.1016/s0925-8388(01)01339-1

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Citations (47)

Comparison Study of PVD Coatings: TiN/AlTiN, TiN and TiAlSiN Used in Wood Machining

Materials (2022)

B. Kucharska P. Czarniak Krzysztof Kulikowski Agnieszka Krawczyńska K. Rożniatowski

In this paper, we analyze the possibilities of the protection of tools for wood machining with PVD (Physical Vapor Deposition) hard coatings. The nanolayered TiN/AlTiN coating, nanocomposite TiAlSiN coatings, and single layer TiN coating were analyzed in order to use them for protection of tools for wood machining. Both nanostructured coatings were deposited in an industrial magnetron sputtering system on the cutting blades made of sintered carbide WC-Co, while TiN single layer coating was deposited by evaporation using thermionic arc. In the case of TiN/AlTiN nanolayer coatings the thickness of the individual TiN and AlTiN layer was in the 5-10 nm range, depending on the substrate vertical position. The microstructure and chemical composition of coatings were studied by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) method. Additionally, in the case of the TiN/AlTiN coating, which was characterized by the best durability characteristics, the transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS) methods were applied. The coatings adhesion to the substrate was analyzed by scratch test method combined with optical microscopy. Nano-hardness and durability tests were performed with uncoated and coated blades using chipboard. The best results durability characteristics were observed for TiN/AlTiN nanolayered coating. Performance tests of knives protected with TiN and TiAlSiN hard coatings did not show significantly better results compared to uncoated ones.

Physical vapor deposition

10.3390/ma15207159

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Citations (15)

PtNiRu/SnO₂ Nanoframes as Anodic Catalyst for Direct Ethanol Fuel Cells

The Journal of Physical Chemistry C (2024)

K. Szmuc Natalia Lach J. Cebulski Bogumił Cieniek Anna Ruszczyńska

Searching for new energy sources and improving the already existing ones are among the most important tasks in physics, material sciences, and chemistry. These three disciplines especially come together in the development of new catalytic materials for fuel cell applications. Herein, a novel nanoframe-based PtNiRu/SnO2 catalyst for ethanol oxidation reaction (EOR) is proposed. Owing to properties resulting from chemical composition, shape, and structure, the catalyst shows enhanced electrocatalytic performance. The presented nanocatalyst is obtained from solid rhombic dodecahedral nanoparticles during galvanic replacement reaction with the following SnO2 nanoparticles deposition on its surface. PtNiRu/SnO2, as well as PtNiRu catalyst, were characterized by transmission electron microscopy and X-ray diffraction and tested electrochemically. PtNiRu/SnO2 nanocatalysts exhibit the highest activity toward EOR and have the lowest onset potential among all of the tested catalysts. The achieved results suggest that the presented nanocatalysts could find application as an anode in a direct ethanol fuel cell for ethanol oxidation.

Direct-ethanol fuel cell

10.1021/acs.jpcc.4c01130

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Improved performance of the functionalized nitinol as a prospective bone implant material

Journal of materials research/Pratt's guide to venture capital sources (2018)

Sarmita Sinha Howa Begam Vinod Kumar Samit Kumar Nandi Jerzy Kubacki

10.1557/jmr.2018.204

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Citations (6)

Melting point of dried gold nanoparticles prepared with ultrasonic spray pyrolysis and lyophilisation

Nanotechnology Reviews (2023)

Žiga Jelen Marcin Krajewski Franc Zupanič Peter Majerič Tilen Švarc

Abstract A coupled process of ultrasonic spray pyrolysis and lyophilisation was used for the synthesis of dried gold nanoparticles. Two methods were applied for determining their melting temperature: uniaxial microcompression and differential scanning calorimetry (DSC) analysis. Uniaxial microcompression resulted in sintering of the dried gold nanoparticles at room temperature with an activation energy of 26–32.5 J/g, which made it impossible to evaluate their melting point. Using DSC, the melting point of the dried gold nanoparticles was measured to be around 1064.3°C, which is close to pure gold. The reason for the absence of a melting point depression in dried gold nanoparticles was their exothermic sintering between 712 and 908.1°C.

Exothermic reaction

Melting-point depression

10.1515/ntrev-2022-0568

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Citations (8)

Weak ferromagnetic response in PbZr_1−xTi_xO₃ single crystals

Journal of Materials Chemistry C (2019)

Iwona Lazar M. Oboz Jerzy Kubacki A. Majchrowski Julita Piecha

For the first time, a weak ferromagnetic hysteresis loop at room temperature has been observed in PbZr_1−xTi_xO₃ (PZT) single crystals.

10.1039/c9tc03710a

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Citations (5)

Viscose nonwoven fabric with copper and its multifunctional properties

Cellulose (2023)

Małgorzata Cieślak Dorota Kowalczyk Anna Baranowska‐Korczyc Irena Kamińska Małgorzata Krzyżowska

Abstract The antimicrobial functionalization of textile structures with copper and its compounds carried out by various methods increased significantly during the SARS-CoV-2 pandemic. So far, in order to obtain antiviral properties the magnetron technique using copper was applied mainly to flat textile structures; polypropylene, polyester and cotton nonwovens, and polyester and cotton woven fabrics. In this study, magnetron sputtering with copper was applied to modify the spatial viscose needle-punched nonwoven fabric. We found that the spatial nonwoven structure made of regenerated cellulose fibers and one-side sputtered with copper has strong antimicrobial activity against Gram-positive Staphylococcus aureus and Gram-negative Klebsiella pneumoniae . In the case of herpes simplex virus type 1 (HSV-1) McKrae strain, vaccinia virus (VACV) WR strain, influenza A virus H1N1 (IFV) and mouse coronavirus (MHV) JHV strain used in the study, Cu modified nonwoven fabric has only weak activity against herpes simplex virus type 1 (HSV-1). It also has no significant toxicity compared to the control medium and pristine nonwoven fabric. The modified nonwoven fabric is characterized also by hydrophobic properties, high electrical conductivity, good air and water vapor permeability, and meets the requirements of breathing resistance for all protection classes (FFP1, FFP2 and FFP3) specified in the EN 149-2001 standard.

Viscose

Nonwoven fabric

Textile

Polypropylene

10.1007/s10570-023-05454-8

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Citations (3)

Local surface conductivity of transition metal oxides mapped with true atomic resolution

Nanoscale (2018)

Christian Rodenbücher Gustav Bihlmayer W. Speier Jerzy Kubacki Marcin Wojtyniak

Local-conductivity atomic force microscopy with atomic resolution reveals that the surface conductivity of slightly reduced transition metal oxides such as TiO₂ and SrTiO₃ is confined to conductance paths on the nanoscale.

Surface conductivity

Atomic units

10.1039/c8nr02562b

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Citations (25)

Photofunctionalization of dental zirconia oxide: Surface modification to improve bio-integration preserving crystal stability

Colloids and Surfaces B Biointerfaces (2017)

Marco Roy Alfonso Pompella Jerzy Kubacki Adam Piosik Bronisław Psiuk

Carbon fibers

Surface Modification

Titanium oxide

10.1016/j.colsurfb.2017.05.031

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Citations (46)

Nano-scale chemical and structural segregation induced in surface layer of NaNbO₃crystals with thermal treatment at oxidising conditions studied by XPS, AFM, XRD, and electric properties tests

Phase Transitions (2009)

A. Molak M. Pawełczyk Jerzy Kubacki K. Szot

The process of ionic segregation in the surface layer induced by the thermal treatment of the NaNbO3 crystal was studied. The study of the as grown crystal and the crystal heated at 970 K in ambient air was carried out for comparison. The changes in the concentration of the elements within the surface layer were determined using XPS measurements. The AFM technique was applied to determine the surface morphology related to nano-scale transformation. The possibility of appearance of the Ruddlesden–Popper phases was detected by the XRD test. The change in the features of the electric permittivity, the loss tangent, and the electric conductivity was ascribed to the marked participation of the chemically modified surface layer in the measured effective electrical properties.

Crystal (programming language)

Surface layer

Dissipation factor

Morphology

10.1080/01411590903341155

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Citations (31)