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Dive into the research topics where Artur Malolepszy is active.

Publication


Featured researches published by Artur Malolepszy.


Journal of Physical Chemistry C | 2012

Simple Dip-Coating Process for the Synthesis of Small Diameter Single-Walled Carbon Nanotubes-Effect of Catalyst Composition and Catalyst Particle Size on Chirality and Diameter

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

Graphene Oxide-Based Nanocomposites Decorated with Silver Nanoparticles as an Antibacterial Agent

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

Graphene oxide and reduced graphene oxide studied by the XRD, TEM and electron spectroscopy methods

Leszek Stobinski; B. Lesiak; Artur Malolepszy; Marta Mazurkiewicz; Bogusław Mierzwa; J. Zemek; P. Jiricek; I. Bieloshapka


Carbon | 2012

Nitrogen doped multi walled carbon nanotubes produced by CVD-correlating XPS and Raman spectroscopy for the study of nitrogen inclusion

Tiva Sharifi; Florian Nitze; Hamid Reza Barzegar; Cheuk-Wai Tai; Marta Mazurkiewicz; Artur Malolepszy; Leszek Stobinski; Thomas Wågberg


Electrochimica Acta | 2012

Synthesis of palladium nanoparticles decorated helical carbon nanofiber as highly active anodic catalyst for direct formic acid fuel cells

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

Preparation of graphene oxide and characterisation using electron spectroscopy

B. Lesiak; Leszek Stobinski; Artur Malolepszy; Marta Mazurkiewicz; L. Kövér; J. Tóth


Physica Status Solidi B-basic Solid State Physics | 2015

Synthesis of carbon nanotubes by the laser ablation method: Effect of laser wavelength

Justyna Chrzanowska; J. Hoffman; Artur Malolepszy; Marta Mazurkiewicz; Tomasz Kowalewski; Z. Szymanski; Leszek Stobinski


Applied Surface Science | 2016

Effect of the Pd/MWCNTs anode catalysts preparation methods on their morphology and activity in a direct formic acid fuel cell

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

Deactivation resistant Pd-ZrO2 supported on multiwall carbon nanotubes catalyst for direct formic acid fuel cells

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

Pd/MWCNTs catalytic activity in the formic acid electrooxidation dependent on catalyst surface treatment

Marta Mazurkiewicz; Artur Malolepszy; Anna Mikolajczuk; Leszek Stobinski; Andrzej Borodzinski; B. Lesiak; J. Zemek; P. Jiricek

Collaboration


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Leszek Stobinski

Warsaw University of Technology

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Marta Mazurkiewicz

Warsaw University of Technology

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B. Lesiak

Polish Academy of Sciences

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J. Zemek

Academy of Sciences of the Czech Republic

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P. Jiricek

Academy of Sciences of the Czech Republic

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Anna Mikolajczuk

Polish Academy of Sciences

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Bogusław Mierzwa

Polish Academy of Sciences

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