Artur Malolepszy
Warsaw University of Technology
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Publication
Featured researches published by Artur Malolepszy.
Journal of Physical Chemistry C | 2012
Hamid R Barzegar; Florian Nitze; Tiva Sharifi; Madeleine Ramstedt; Cheuk W. Tai; Artur Malolepszy; Leszek Stobinski; Thomas Wågberg
We report on a dip-coating method to prepare catalyst particles (mixture of iron and cobalt) with a controlled diameter distribution on silicon wafer substrates by changing the solutions concentration and withdrawal velocity. The size and distribution of the prepared catalyst particles were analyzed by atomic force microscopy. Carbon nanotubes were grown by chemical vapor deposition on the substrates with the prepared catalyst particles. By decreasing the catalyst particle size to below 10 nm, the growth of carbon nanotubes can be tuned from few-walled carbon nanotubes, with homogeneous diameter, to highly pure single-walled carbon nanotubes. Analysis of the Raman radial breathing modes, using three different Raman excitation wavelengths (488, 633, and 785 nm), showed a relatively broad diameter distribution (0.8–1.4 nm) of single-walled carbon nanotubes with different chiralities. However, by changing the composition of the catalyst particles while maintaining the growth parameters, the chiralities of single-walled carbon nanotubes were reduced to mainly four different types, (12, 1), (12, 0), (8, 5), and (7, 5), accounting for about 70% of all nanotubes.
Nanoscale Research Letters | 2018
Sławomir Jaworski; Mateusz Wierzbicki; Ewa Sawosz; Anna Jung; Grzegorz Gielerak; Joanna Biernat; Henryk Jaremek; Witold Łojkowski; Bartosz Woźniak; Jacek Wojnarowicz; Leszek Stobinski; Artur Malolepszy; Marta Mazurkiewicz-Pawlicka; Maciej Łojkowski; Natalia Kurantowicz; A. Chwalibog
One of the most promising methods against drug-resistant bacteria can be surface-modified materials with biocidal nanoparticles and nanocomposites. Herein, we present a nanocomposite with silver nanoparticles (Ag-NPs) on the surface of graphene oxide (GO) as a novel multifunctional antibacterial and antifungal material. Ultrasonic technologies have been used as an effective method of coating polyurethane foils. Toxicity on gram-negative bacteria (Escherichia coli), gram-positive bacteria (Staphylococcus aureus and Staphylococcus epidermidis), and pathogenic yeast (Candida albicans) was evaluated by analysis of cell morphology, assessment of cell viability using the PrestoBlue assay, analysis of cell membrane integrity using the lactate dehydrogenase assay, and reactive oxygen species production. Compared to Ag-NPs and GO, which have been widely used as antibacterial agents, our nanocomposite shows much higher antimicrobial efficiency toward bacteria and yeast cells.
Journal of Electron Spectroscopy and Related Phenomena | 2014
Leszek Stobinski; B. Lesiak; Artur Malolepszy; Marta Mazurkiewicz; Bogusław Mierzwa; J. Zemek; P. Jiricek; I. Bieloshapka
Carbon | 2012
Tiva Sharifi; Florian Nitze; Hamid Reza Barzegar; Cheuk-Wai Tai; Marta Mazurkiewicz; Artur Malolepszy; Leszek Stobinski; Thomas Wågberg
Electrochimica Acta | 2012
Florian Nitze; Marta Mazurkiewicz; Artur Malolepszy; Anna Mikolajczuk; Piotr Kedzierzawski; Cheuk-Wai Tai; Guangzhi Hu; Krzysztof J. Kurzydłowski; Leszek Stobinski; Andrzej Borodzinski; Thomas Wågberg
Journal of Electron Spectroscopy and Related Phenomena | 2014
B. Lesiak; Leszek Stobinski; Artur Malolepszy; Marta Mazurkiewicz; L. Kövér; J. Tóth
Physica Status Solidi B-basic Solid State Physics | 2015
Justyna Chrzanowska; J. Hoffman; Artur Malolepszy; Marta Mazurkiewicz; Tomasz Kowalewski; Z. Szymanski; Leszek Stobinski
Applied Surface Science | 2016
B. Lesiak; Marta Mazurkiewicz; Artur Malolepszy; Leszek Stobinski; Bogusław Mierzwa; A. Mikolajczuk-Zychora; K. Juchniewicz; Andrzej Borodzinski; J. Zemek; P. Jiricek
International Journal of Hydrogen Energy | 2015
Artur Malolepszy; Marta Mazurkiewicz; Leszek Stobinski; B Lesiak; L Kövér; J Tóth; B Mierzwa; Andrzej Borodzinski; Florian Nitze; Thomas Wågberg
Physica Status Solidi B-basic Solid State Physics | 2011
Marta Mazurkiewicz; Artur Malolepszy; Anna Mikolajczuk; Leszek Stobinski; Andrzej Borodzinski; B. Lesiak; J. Zemek; P. Jiricek