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wszystkich: 181
Wyniki wyszukiwania dla: electrochemistry
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Carbon nanowalls: A new versatile graphene based interface for laser desorption/ionization-mass spectrometry detection of small compounds in real samples.
PublikacjaCarbon nanowalls, vertically aligned graphene nanosheets, attract attention owing to their tunable band-gap, high conductivity, high mechanical robustness, high optical absorbance and other remarkable properties. In this paper, we report for the first time, the use of hydrophobic boron-doped carbon nanowalls (CNWs) for laser desorption/ionization of small compounds and their subsequent detection by mass spectrometry (LDI-MS). The...
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Special Issue: Recent Advances in Corrosion Science
PublikacjaThe dynamic development of the global industry and growing demand for new material technologies generates constantly increasing problems regarding premature material degradation and the requirement to determine corrosion mechanisms and to develop new protection/evaluation approaches. This Special Issue, “Recent Advances in Corrosion Science”, brings together fourteen articles and one review, providing a snapshot of the recent activity...
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Synthesis and electrochemical characteristics of novel dithiocarbamate polymers
PublikacjaNovel dithiocarbamate compounds have been obtained by reacting a linear poly(ethylenimine)polymer, MW 50,000, with CS2. The resulting anionic polymers contain, depending on the reaction conditions, up to two sulfur atoms per one nitrogen atom (approx. 40% w/w). The polymers are soluble in dimethylsulfoxide and insoluble in acetonitrile solutions. In both solvents they are electrochemically active, in the latter case as a cast film...
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Controlling crystallites orientation and facet exposure for enhanced electrochemical properties of polycrystalline MoO3 films
PublikacjaThis study focuses on the development and optimization of MoO3 films on commercially available FTO substrates using the pulsed laser deposition (PLD) technique. By carefully selecting deposition conditions and implementing post-treatment procedures, precise control over crystallite orientation relative to the substrate is achieved. Deposition at 450 °C in O2 atmosphere results in random crystallite arrangement, while introducing...
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Direct amination of boron-doped diamond by plasma polymerized allylamine film
PublikacjaA novel microwave pulsed-plasma based method for the modification of the hydrogen-terminated polycrystalline boron-doped diamond (BDD) with a thin film of polymerized allylamine (PPAAm) is reported. A modified BDD surface is resistant to hydrolysis and delamination and is characterized by a high density of positively charged amino groups. Pulsed microwave plasma was applied to improve the degree of cross-linking and bonding of...
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Locally sculptured modification of the electrochemical response of conductive poly(lactic acid) 3D prints by femtosecond laser processing
PublikacjaThis manuscript presents an approach to sculpture high electrochemical activity of the 3D printed electrodes with poly(lactic acid) (PLA) matrix and carbon black (CB) filler by femtosecond laser (FSL) ablation. CB-PLA utility for electrochemical applications depends on a surface modification aiming to remove the PLA and uncover the conductive CB. We have discussed how laser pulse energy is critical for such an activation process....
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Low-power microwave-induced fabrication of functionalised few-layer black phosphorus electrodes: A novel route towards Haemophilus Influenzae pathogen biosensing devices
PublikacjaIn this paper, various passivation schemes were applied at few-layer black phosphorus (FLBP) to achieve covalent functionalisation with 4-azidobenzoic acid, improving its electrochemical response intended for analytical and biosensing applications. The thermal and microwave assisted modification procedures in toluene and dime-thylformamide resulted in high reversibility of reactions on functionalised FLBP using a ferricyanide/ferrocya-nide...
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Combined effect of nitrogen-doped functional groups and porosity of porous carbons on electrochemical performance of supercapacitors
PublikacjaIn this work, nitrogen-doped porous carbons obtained from chitosan, gelatine, and green algae were investigated in their role as supercapacitor electrodes. The effects of three factors on electrochemical performance have been studied— of the specific surface area, functional groups, and a porous structure. Varying nitrogen contents (from 5.46 to 10.08 wt.%) and specific surface areas (from 532 to 1095 m2g−1) were obtained by modifying...
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Low-coherence photonic method of electrochemical processes monitoring
PublikacjaWe present an advanced multimodality characterization platform for simultaneous optical and electrochemical measurements of ferrocyanides. Specifcally, we combined a fber-optic Fabry– Perot interferometer with a three-electrode electrochemical setup to demonstrate a proof-ofprinciple of this hybrid characterization approach, and obtained feasibility data in its monitoring of electrochemical reactions in a boron-doped diamond flm...
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Unconditionally blue: Curing epoxy with polyethylene glycol (PEG) surface-functionalized Zn Fe3-O4 magnetic nanoparticles
PublikacjaNanoparticles govern early (chemical-controlled) and late (diffusion-controlled) stages of epoxy crosslinking, respectively. Surface functionalization of nanoparticles with macromolecules was recognized as an effective route to compensate for inadequate diffusion-controlled crosslinking. However, the effect of bulk composition amended with cations having catalytic effect towards epoxy ring opening has remained hitherto undescribed....
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Beyond Antioxidant Activity: Redox Properties of Catechins May Affect Changes in the DNA Methylation Profile—The Example of SRXN1 Gene
PublikacjaThe role of catechins in the epigenetic regulation of gene expression has been widely studied; however, if and how this phenomenon relates to the redox properties of these polyphenols remains unknown. Our earlier study demonstrated that exposure of the human colon adenocarcinoma HT29 cell line to these antioxidants affects the expression of redox-related genes. In particular, treatment with (−)-epigallocatechin (EGC) downregulated...
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ANTIOXIDANT POWER SERIES (APS) AS A TOOL FOR RATIONAL DESIGN AND ASSESSMENT OF HEALTH PROMOTING PROPERTIES OF FUNCTONAL FOODS BASED ON ANTIOXIDANT PHYTOCHEMICALS
PublikacjaOver past decades, plantborne antioxidants dominated so called "translational research" in the area of food, nutrition, and disease prevention. Among consumers and producers, such phytochemicals are synonyms of nutriceuticals. Popularity and commercial success of antioxidants stems from mechanistic studies suggesting the involvement of reactive oxygen species in etiology of chronic diseases. However, epidemiology failed to provide...
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Study on Combined Optical and Electrochemical Analysis Using Indium-tin-oxide-coated Optical Fiber Sensor
PublikacjaThe growing needs for fast and reliable sensing devices stimulate development of new technological solutions. In this work a new multi-domain sensing method is demonstrated where optical sensing device has been applied to enhance amount of data received during electrochemical analysis. Thin, optically transparent, high-refractive-index, and electrically conductive indium tin oxide (ITO) film was deposited using magnetron sputtering...
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Michał Sobaszek dr inż.
OsobyMichał Sobaszek was born in Gdansk in 1984. In the summer of 2009, he received a Master degree in Materials Engineering at Gdansk University of Technology. Currently, he is an Assistant Professor at the Faculty of Electronics at the Gdańsk University of Technology. In 2018 he was honoured with the scholarship for the outstanding young researches by the Minister of Science and Higher Education of Poland. For more than 7 years, he...
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Scanning electron microscopy (SEM) images of boron-doped diamond thin films at poly(lactic acid)
Dane BadawczeThe dataset contains the photos obtained by scanning electron microscope(SEM), revealing the surface morphology and cross-section of boron-doped diamond electrodes on commercially available graphene-doped polylactide acid. The boron doping level expressed as the [B]/[C] ratio in the gas phase for these studies was 500 and 10,000 ppm. The top views of...
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Electrochemical data for carbonized metal-organic framworks with cobalt
Dane BadawczeThe data includes the Metal-Organic Frameworks (MOF) measurements, where cobalt was added. The research focuses on the impact of aluminium on Oxygen Evolution Reaction (OER). The measurements were conducted on [EC Lab]. The techniques included are Linear Sweep Voltammetry (LSV), Tafel slope, Chronopotentiometry (CP) and Electrochemical Impedance Spectroscopy...
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The electrochemical studies of CB-PLA electrode after surface activation by proteinase K digestion with different times and concentrations
Dane BadawczeThe dataset contains the electrochemical studies performed to evaluate surface activation of the CB-PLA 3D printed electrodes by enzymatic hydrolysis in a solution containing proteinase K. DIfferent proteinase K concentrations and digestion times were evaluated, as described in subfolder names. The studies were performed before surface activation, during...
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The electrochemical studies of CB-PLA surface activation by electrolysis in 1M NaOH
Dane BadawczeThe dataset contains the electrochemical studies performed under different conditions of surface activation of the CB-PLA 3D printed electrodes. The activation was performed by electrolysis in 1M NaOH solution under cycling polarization with different anodic or cathodic overpotentials (data in different subfolders). The file names contain the exact...
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The electrochemical studies of CB-PLA electrode after surface activation by proteinase K digestion
Dane BadawczeThe dataset contains the electrochemical studies performed to evaluate surface activation of the CB-PLA 3D printed electrodes by enzymatic hydrolysis in a solution containing proteinase K (72h digestion period). Different enzyme concentrations were evaluated: 0.2, 0.4, 0.6 and 0.8 mg/ml. The studies were performed before surface activation, during and...
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Caffeine detection using CB-PLA electrode after Nd:YAG laser ablation in He atmosphere
Dane BadawczeThe dataset contains electrochemical studies in form of cyclic voltammetry (CV) and differential pulse voltammetry (DPV) of laser-activated 3D printed CB-PLA electrodes. The ablation of the 3D-printed CB-PLA electrodes was carried out using a pulsed LaserBlast 500 Nd:YAG laser (Quantel, France) operating at 1064 nm and a 6 ns pulse duration.