In this work, we report on the fabrication of nanocomposites based on superparamagnetic iron oxid... more In this work, we report on the fabrication of nanocomposites based on superparamagnetic iron oxide nanoparticles (SPIONs) in combination with hydroxyapatite (HAp) as a platform for drug delivery and magnetic hyperthermia application. First, the influence of experimental conditions such as co-precipitant, bath temperature, and pH on the morphology and magnetic properties of SPIONs was investigated. Then, the superparamagnetic particles were coated with the hydroxyapatite layer for further loading of anticancer drugs, determining the optimal thickness of the HAp shell. The composite was fabricated by the wet chemical process and was characterized by optimizing the experimental conditions of the wiring synthesis to obtain the superparamagnetic spherical material with a high HAp loading as a platform for drug uptake. SEM and TEM studies confirmed the round shape of the magnetic core up to 15 nm in size with a well-defined HAp shell. After checking the material’s superparamagnetic proper...
In this work, we present magnetic nanoparticles based on iron oxide doped with zinc synthesized u... more In this work, we present magnetic nanoparticles based on iron oxide doped with zinc synthesized using the wet co-precipitation method for environmental application. The morphology of the samples was revealed by SEM and TEM, which showed particles of granular shape and size of about 15 nm. The specific surface areas of the materials using the BET method were within the range of 85.7 to 101.5 m2 g−1 depending on the zinc content in the superparamagnetic iron oxide nanoparticles (SPIONs). Magnetometry was performed to determine the magnetic properties of the particles, indicating superparamagnetism. Synthesized magnetic nanoparticles with different amounts of zinc dopant were used as an adsorbent to remove model pollutant Titan yellow (TY) from the aqueous solutions. Adsorption was determined by investigating the effects of sorbent amount, dye concentration, and contact time. The synthesized material removed Titan yellow quickly and efficiently within the physical adsorption. The adsor...
Recently, there has been a lot of talk about diabetes in children. Have you ever wondered what di... more Recently, there has been a lot of talk about diabetes in children. Have you ever wondered what diabetes is and where it comes from? Diabetes is a disease with a long history. It causes a high sugar level in the blood, which is dangerous for many organs including the heart and kidneys. Diabetes also damages blood vessels and the nervous system. Unfortunately, diabetes is often detected by accident during tests for other diseases or by standard blood tests performed during a check-up. The earliest symptoms of diabetes that a person might notice include increased hunger and thirst, tiredness, or frequent urination. If you experience these symptoms, do not take them lightly—have a doctor check your blood sugar level.
Reinforced concrete based on ordinary Portland cement (OPC) is one of the most commonly used mate... more Reinforced concrete based on ordinary Portland cement (OPC) is one of the most commonly used materials in modern buildings. Due to the global growth of the building industry, concrete components have been partially or completely replaced with waste materials that can be used as binders or aggregates. Besides the ecological aspects, modern architecture widely needs materials to make the concrete durable, resisting large loads and various detrimental forces in the environment. This opens the possibilities of managing waste materials and applying them in practice. This paper presents a concise review of the green solutions for ecofriendly materials in the building industry that deal with the practical application of materials commonly treated as waste. The main emphasis was placed on their influence on the properties of the building material, optimal composition of mixtures, and discussion of the advantages and disadvantages of each of the “green” additives. It turned out that some sol...
Abstract The present paper demonstrates the feasibility of application of hybrid material based o... more Abstract The present paper demonstrates the feasibility of application of hybrid material based on polyindole and gold nanoparticles as a low-cost and attractive alternative of electrocatalyst utilized for electrooxidation of potential fuel, such as ascorbic acid (AA) for low-temperature fuel cell technology. Polyindole (PIN) has been deposited electrochemically with and without a hard-template method forming nanobrush with well-defined wires. The PIN nanobrush has been decorated with gold nanoparticles and used for AA oxidation. Hybrid material created within this work offers high surface area, thus increasing the current densities recorded during CV experiments, in comparison to those characteristic of the hybrid created without hard-template. The proposed high-surface-area material is a promising substrate for electrooxidation processes.
CdTe films were prepared at room temperature by using two-step method. In the first step, Cd laye... more CdTe films were prepared at room temperature by using two-step method. In the first step, Cd layer was deposited electrochemically on Pt substrate and in the second step, CdTe films were formed chemically by dipping substrate covered with Cd into the solution containing telluride ions. The properties of deposited CdTe films were investigated. Using XRD method, it was found that the formed CdTe films are polycrystalline with cubic structure. Raman and XPS spectra revealed that deposits contain not only CdTe but also some amount of TeO2 and probably CdO or Cd(OH)2, as well. The optical band gap energy determined using UV-Vis spectra was in the range of 1.4-1.6 eV depending on the length of time of Cd deposition. The changes in deposited films photoactivity under illumination in the telluride solution indicated the formation of n-type of CdTe films.
ABSTRACT In this work we examined the electrochemical properties of poly(indole-5-carboxylic acid... more ABSTRACT In this work we examined the electrochemical properties of poly(indole-5-carboxylic acid), PIn5COOH. The polymer was produced by electrochemical polymerisation using cyclic voltammetry (CV). It was shown that PIn5COOH is electroactive in aqueous solutions showing two redox processes in acidic solution and one redox process in solutions with pH > 4. The oxidation of catechol (CT) on Pt/In5COOH modified electrodes was investigated by cyclic voltammetry (CV) and rotating disc electrode (RDE) voltammetry. It was established that CT was oxidised only after the oxidation of polymer film was initiated and that polymer significantly enhanced the oxidation and reduction peak currents in comparison with bare Pt electrode. The variation of peak currents (i pa, i pc) as a function of CT concentration was found to be linear up to 6 mM. Experiments with a rotating disk electrode show that the oxidation reaction of catechol occures not only at the polymer/electrolyte interface but also in the polymer film. Keywordspoly(indole-5-carboxylic acid)-catechol-electrooxidation
Iron oxide-based nanoparticles have been modified in their core with holmium(III) in an amount af... more Iron oxide-based nanoparticles have been modified in their core with holmium(III) in an amount affecting only slightly their magnetic properties. Nanoparticles were conjugated covalently with biomolecule of trastuzumab (Herceptin®), the monoclonal antibody that recognizes cancer cells overexpressing HER2 receptors targeting such nanoparticles to the specified tumor tissues. Systematic studies of Ho3+-doped bioconjugates were carried out as a preliminary step for future replacement of ‘cold’ Ho with 166Ho radionuclide, emitting ‘soft’ beta(-) radiation for possible targeted radionuclide therapy. Physicochemical properties of the obtained bioconjugates were subsequently tested for use in magnetic hyperthermia, considered as an effective, low-invasiveness anticancer therapy. With such a system we expect to achieve both: active targeting and multimodal action by simultaneous internal and localized irradiation and magnetic hyperthermia of specific cancers.
Organic inhibitors have attracted considerable attention due to their promising application as ad... more Organic inhibitors have attracted considerable attention due to their promising application as admixtures in concrete protecting against corrosion of rebars. Over the last decade the use of those inhibitors significantly raised. The inhibition efficiency depends on their physical and chemical properties. This paper gives short overview of the protection of steel in concrete against the ingress of chlorides, oxygen and carbon dioxide in concrete, as species causing the corrosion of rebars. This work involves only organic inhibitors.
CdTe films were prepared at room temperature by using two-step method. In the first step, Cd laye... more CdTe films were prepared at room temperature by using two-step method. In the first step, Cd layer was deposited electrochemically on Pt substrate and in the second step, CdTe films were formed chemically by dipping substrate covered with Cd into the solution containing telluride ions. The properties of deposited CdTe films were investigated. Using XRD method, it was found that the formed CdTe films are polycrystalline with cubic structure. Raman and XPS spectra revealed that deposits contain not only CdTe but also some amount of TeO 2 and probably CdO or Cd(OH) 2 , as well. The optical band gap energy determined using UV-Vis spectra was in the range of 1.4-1.6 eV depending on the length of time of Cd deposition. The changes in deposited films photoactivity under illumination in the telluride solution indicated the formation of n-type of CdTe films.
Magnetorheological (MR) fluids are classified as smart materials whose viscoplastic characteristi... more Magnetorheological (MR) fluids are classified as smart materials whose viscoplastic characteristics change under the magnetic field. They are widely applied for dynamic energy dissipation due to their rapid thickening under the external magnetic field. In this work, the core–shell suspension of superparamagnetic iron oxide-based nanoparticles was synthesized and dispersed in silicone oil. Much effort has been made to prepare suspension meeting requirements of MR fluid. The experimental squeezing flow response was studied using a modified split Hopkinson pressure bar (SHPB) with various shear rates. Tests with modified SHPB show that MR fluid rapidly responds to the compression thickening and forming chain-like structures. MR fluid dissipates the energy generated during compression stress tests. This study presents a simple and cost-effective synthesis way suitable for MR fluid formation for its dynamic energy dissipation application.
Your brain controls everything you do, and it is much more powerful than any computer you can fin... more Your brain controls everything you do, and it is much more powerful than any computer you can find. This complex organ sends messages using cells called neurons, and it never stops analyzing data, even as you sleep. Scientists are trying to understand the brain to create a digital version. But is it possible for computers to do the same things our brains can? For computers to do so, we need to create something called an artificial neural network, which has digital neurons connected into a complex net that resembles the structure of the brain. To make an artificial neural network, we need to use the most universal language—mathematics.
Title: Developing new methodologies to prepare optical holograms employing diode lasers Faculty A... more Title: Developing new methodologies to prepare optical holograms employing diode lasers Faculty Advisor(s): Dr Gottipaty Rao Abstract: Developing new methodologies to prepare optical holograms employing diode lasers. Traditionally, He-‐Ne lasers are used to prepare optical holograms. He-‐Ne lasers provide monochromatic beam with large coherence length which is well suited for optical holography work. The larger the coherence length of the laser, the larger will be the depth perspective in a hologram giving an impressive three dimensional view of the object. We are investigating the possibilities of employing diode lasers to prepare quality optical holograms. Diode lasers are low cost, highly efficient and require low power and can be operated by batteries, and compact. The diode lasers offer diffraction-‐limited point beam and hence can be employed without beam expanders or spatial filters. The suitability of diode lasers for holography applications depend on whether the diode la...
In this work, we report on the fabrication of nanocomposites based on superparamagnetic iron oxid... more In this work, we report on the fabrication of nanocomposites based on superparamagnetic iron oxide nanoparticles (SPIONs) in combination with hydroxyapatite (HAp) as a platform for drug delivery and magnetic hyperthermia application. First, the influence of experimental conditions such as co-precipitant, bath temperature, and pH on the morphology and magnetic properties of SPIONs was investigated. Then, the superparamagnetic particles were coated with the hydroxyapatite layer for further loading of anticancer drugs, determining the optimal thickness of the HAp shell. The composite was fabricated by the wet chemical process and was characterized by optimizing the experimental conditions of the wiring synthesis to obtain the superparamagnetic spherical material with a high HAp loading as a platform for drug uptake. SEM and TEM studies confirmed the round shape of the magnetic core up to 15 nm in size with a well-defined HAp shell. After checking the material’s superparamagnetic proper...
In this work, we present magnetic nanoparticles based on iron oxide doped with zinc synthesized u... more In this work, we present magnetic nanoparticles based on iron oxide doped with zinc synthesized using the wet co-precipitation method for environmental application. The morphology of the samples was revealed by SEM and TEM, which showed particles of granular shape and size of about 15 nm. The specific surface areas of the materials using the BET method were within the range of 85.7 to 101.5 m2 g−1 depending on the zinc content in the superparamagnetic iron oxide nanoparticles (SPIONs). Magnetometry was performed to determine the magnetic properties of the particles, indicating superparamagnetism. Synthesized magnetic nanoparticles with different amounts of zinc dopant were used as an adsorbent to remove model pollutant Titan yellow (TY) from the aqueous solutions. Adsorption was determined by investigating the effects of sorbent amount, dye concentration, and contact time. The synthesized material removed Titan yellow quickly and efficiently within the physical adsorption. The adsor...
Recently, there has been a lot of talk about diabetes in children. Have you ever wondered what di... more Recently, there has been a lot of talk about diabetes in children. Have you ever wondered what diabetes is and where it comes from? Diabetes is a disease with a long history. It causes a high sugar level in the blood, which is dangerous for many organs including the heart and kidneys. Diabetes also damages blood vessels and the nervous system. Unfortunately, diabetes is often detected by accident during tests for other diseases or by standard blood tests performed during a check-up. The earliest symptoms of diabetes that a person might notice include increased hunger and thirst, tiredness, or frequent urination. If you experience these symptoms, do not take them lightly—have a doctor check your blood sugar level.
Reinforced concrete based on ordinary Portland cement (OPC) is one of the most commonly used mate... more Reinforced concrete based on ordinary Portland cement (OPC) is one of the most commonly used materials in modern buildings. Due to the global growth of the building industry, concrete components have been partially or completely replaced with waste materials that can be used as binders or aggregates. Besides the ecological aspects, modern architecture widely needs materials to make the concrete durable, resisting large loads and various detrimental forces in the environment. This opens the possibilities of managing waste materials and applying them in practice. This paper presents a concise review of the green solutions for ecofriendly materials in the building industry that deal with the practical application of materials commonly treated as waste. The main emphasis was placed on their influence on the properties of the building material, optimal composition of mixtures, and discussion of the advantages and disadvantages of each of the “green” additives. It turned out that some sol...
Abstract The present paper demonstrates the feasibility of application of hybrid material based o... more Abstract The present paper demonstrates the feasibility of application of hybrid material based on polyindole and gold nanoparticles as a low-cost and attractive alternative of electrocatalyst utilized for electrooxidation of potential fuel, such as ascorbic acid (AA) for low-temperature fuel cell technology. Polyindole (PIN) has been deposited electrochemically with and without a hard-template method forming nanobrush with well-defined wires. The PIN nanobrush has been decorated with gold nanoparticles and used for AA oxidation. Hybrid material created within this work offers high surface area, thus increasing the current densities recorded during CV experiments, in comparison to those characteristic of the hybrid created without hard-template. The proposed high-surface-area material is a promising substrate for electrooxidation processes.
CdTe films were prepared at room temperature by using two-step method. In the first step, Cd laye... more CdTe films were prepared at room temperature by using two-step method. In the first step, Cd layer was deposited electrochemically on Pt substrate and in the second step, CdTe films were formed chemically by dipping substrate covered with Cd into the solution containing telluride ions. The properties of deposited CdTe films were investigated. Using XRD method, it was found that the formed CdTe films are polycrystalline with cubic structure. Raman and XPS spectra revealed that deposits contain not only CdTe but also some amount of TeO2 and probably CdO or Cd(OH)2, as well. The optical band gap energy determined using UV-Vis spectra was in the range of 1.4-1.6 eV depending on the length of time of Cd deposition. The changes in deposited films photoactivity under illumination in the telluride solution indicated the formation of n-type of CdTe films.
ABSTRACT In this work we examined the electrochemical properties of poly(indole-5-carboxylic acid... more ABSTRACT In this work we examined the electrochemical properties of poly(indole-5-carboxylic acid), PIn5COOH. The polymer was produced by electrochemical polymerisation using cyclic voltammetry (CV). It was shown that PIn5COOH is electroactive in aqueous solutions showing two redox processes in acidic solution and one redox process in solutions with pH > 4. The oxidation of catechol (CT) on Pt/In5COOH modified electrodes was investigated by cyclic voltammetry (CV) and rotating disc electrode (RDE) voltammetry. It was established that CT was oxidised only after the oxidation of polymer film was initiated and that polymer significantly enhanced the oxidation and reduction peak currents in comparison with bare Pt electrode. The variation of peak currents (i pa, i pc) as a function of CT concentration was found to be linear up to 6 mM. Experiments with a rotating disk electrode show that the oxidation reaction of catechol occures not only at the polymer/electrolyte interface but also in the polymer film. Keywordspoly(indole-5-carboxylic acid)-catechol-electrooxidation
Iron oxide-based nanoparticles have been modified in their core with holmium(III) in an amount af... more Iron oxide-based nanoparticles have been modified in their core with holmium(III) in an amount affecting only slightly their magnetic properties. Nanoparticles were conjugated covalently with biomolecule of trastuzumab (Herceptin®), the monoclonal antibody that recognizes cancer cells overexpressing HER2 receptors targeting such nanoparticles to the specified tumor tissues. Systematic studies of Ho3+-doped bioconjugates were carried out as a preliminary step for future replacement of ‘cold’ Ho with 166Ho radionuclide, emitting ‘soft’ beta(-) radiation for possible targeted radionuclide therapy. Physicochemical properties of the obtained bioconjugates were subsequently tested for use in magnetic hyperthermia, considered as an effective, low-invasiveness anticancer therapy. With such a system we expect to achieve both: active targeting and multimodal action by simultaneous internal and localized irradiation and magnetic hyperthermia of specific cancers.
Organic inhibitors have attracted considerable attention due to their promising application as ad... more Organic inhibitors have attracted considerable attention due to their promising application as admixtures in concrete protecting against corrosion of rebars. Over the last decade the use of those inhibitors significantly raised. The inhibition efficiency depends on their physical and chemical properties. This paper gives short overview of the protection of steel in concrete against the ingress of chlorides, oxygen and carbon dioxide in concrete, as species causing the corrosion of rebars. This work involves only organic inhibitors.
CdTe films were prepared at room temperature by using two-step method. In the first step, Cd laye... more CdTe films were prepared at room temperature by using two-step method. In the first step, Cd layer was deposited electrochemically on Pt substrate and in the second step, CdTe films were formed chemically by dipping substrate covered with Cd into the solution containing telluride ions. The properties of deposited CdTe films were investigated. Using XRD method, it was found that the formed CdTe films are polycrystalline with cubic structure. Raman and XPS spectra revealed that deposits contain not only CdTe but also some amount of TeO 2 and probably CdO or Cd(OH) 2 , as well. The optical band gap energy determined using UV-Vis spectra was in the range of 1.4-1.6 eV depending on the length of time of Cd deposition. The changes in deposited films photoactivity under illumination in the telluride solution indicated the formation of n-type of CdTe films.
Magnetorheological (MR) fluids are classified as smart materials whose viscoplastic characteristi... more Magnetorheological (MR) fluids are classified as smart materials whose viscoplastic characteristics change under the magnetic field. They are widely applied for dynamic energy dissipation due to their rapid thickening under the external magnetic field. In this work, the core–shell suspension of superparamagnetic iron oxide-based nanoparticles was synthesized and dispersed in silicone oil. Much effort has been made to prepare suspension meeting requirements of MR fluid. The experimental squeezing flow response was studied using a modified split Hopkinson pressure bar (SHPB) with various shear rates. Tests with modified SHPB show that MR fluid rapidly responds to the compression thickening and forming chain-like structures. MR fluid dissipates the energy generated during compression stress tests. This study presents a simple and cost-effective synthesis way suitable for MR fluid formation for its dynamic energy dissipation application.
Your brain controls everything you do, and it is much more powerful than any computer you can fin... more Your brain controls everything you do, and it is much more powerful than any computer you can find. This complex organ sends messages using cells called neurons, and it never stops analyzing data, even as you sleep. Scientists are trying to understand the brain to create a digital version. But is it possible for computers to do the same things our brains can? For computers to do so, we need to create something called an artificial neural network, which has digital neurons connected into a complex net that resembles the structure of the brain. To make an artificial neural network, we need to use the most universal language—mathematics.
Title: Developing new methodologies to prepare optical holograms employing diode lasers Faculty A... more Title: Developing new methodologies to prepare optical holograms employing diode lasers Faculty Advisor(s): Dr Gottipaty Rao Abstract: Developing new methodologies to prepare optical holograms employing diode lasers. Traditionally, He-‐Ne lasers are used to prepare optical holograms. He-‐Ne lasers provide monochromatic beam with large coherence length which is well suited for optical holography work. The larger the coherence length of the laser, the larger will be the depth perspective in a hologram giving an impressive three dimensional view of the object. We are investigating the possibilities of employing diode lasers to prepare quality optical holograms. Diode lasers are low cost, highly efficient and require low power and can be operated by batteries, and compact. The diode lasers offer diffraction-‐limited point beam and hence can be employed without beam expanders or spatial filters. The suitability of diode lasers for holography applications depend on whether the diode la...
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Papers by Magdalena Osial