1
|
Sints V, Sarkar M, Riedl J, Demouchy G, Dubois E, Perzynski R, Zablotsky D, Kronkalns G, Blums E. Effect of an excess of surfactant on thermophoresis, mass diffusion and viscosity in an oily surfactant-stabilized ferrofluid. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2022; 45:43. [PMID: 35511376 DOI: 10.1140/epje/s10189-022-00200-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
The effect of an excess of surfactant on the thermophoresis of a sterically stabilized ferrofluid is investigated experimentally by forced Rayleigh scattering (FRS). The experiments are performed with a stable magnetic fluid sample to which controlled amounts of surfactant are added. A decrease in the thermally induced transport of magnetic nanoparticles is observed while increasing the temperature T. The positive Soret coefficient [Formula: see text] decreases by adding 2 vol% of surfactant at room temperature. As shown by FRS relaxation, this decreasing is mainly associated with a reduction of the interaction between the carrier fluid and individual nanoparticles. No significant effect of extra surfactant on the sign of [Formula: see text] is observed at higher T's (up to [Formula: see text]C). Dynamic light scattering at room temperature reveals the presence of a small amount of clusters/aggregates in the samples, which are hardly detectable by FRS relaxation. The presence of these small clusters/aggregates is confirmed by a rheological probing of the fluid properties. Whatever T, a small amount of added surfactant first causes a decrease of the ferrofluid viscosity, associated with a 10% decreasing of the flow activation energy. Further on, viscosity and activation energy both recover at higher excess surfactant concentrations. These results are analyzed in terms of saturation of the surfactant layer, concentration of free surfactant chains and heat of transport of the nanoparticles.
Collapse
Affiliation(s)
- Viesturs Sints
- Institute of Physics, University of Latvia, Miera 32, Salaspils, LV-2169, Latvia.
| | - Mitradeep Sarkar
- CNRS - Lab. PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, Case 51-4 Place Jussieu, 75005, Paris, France
| | - Jesse Riedl
- CNRS - Lab. PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, Case 51-4 Place Jussieu, 75005, Paris, France
| | - Gilles Demouchy
- CNRS - Lab. PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, Case 51-4 Place Jussieu, 75005, Paris, France
- Dpt de Physique, Univ. Cergy-Pontoise, 33 Bd du port, 95011, Cergy-Pontoise, France
| | - Emmanuelle Dubois
- CNRS - Lab. PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, Case 51-4 Place Jussieu, 75005, Paris, France
| | - Régine Perzynski
- CNRS - Lab. PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, Case 51-4 Place Jussieu, 75005, Paris, France
| | - Dmitry Zablotsky
- Institute of Physics, University of Latvia, Miera 32, Salaspils, LV-2169, Latvia
| | - Gunars Kronkalns
- Institute of Physics, University of Latvia, Miera 32, Salaspils, LV-2169, Latvia
| | - Elmars Blums
- Institute of Physics, University of Latvia, Miera 32, Salaspils, LV-2169, Latvia
| |
Collapse
|
2
|
Socoliuc V, Avdeev MV, Kuncser V, Turcu R, Tombácz E, Vékás L. Ferrofluids and bio-ferrofluids: looking back and stepping forward. NANOSCALE 2022; 14:4786-4886. [PMID: 35297919 DOI: 10.1039/d1nr05841j] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ferrofluids investigated along for about five decades are ultrastable colloidal suspensions of magnetic nanoparticles, which manifest simultaneously fluid and magnetic properties. Their magnetically controllable and tunable feature proved to be from the beginning an extremely fertile ground for a wide range of engineering applications. More recently, biocompatible ferrofluids attracted huge interest and produced a considerable increase of the applicative potential in nanomedicine, biotechnology and environmental protection. This paper offers a brief overview of the most relevant early results and a comprehensive description of recent achievements in ferrofluid synthesis, advanced characterization, as well as the governing equations of ferrohydrodynamics, the most important interfacial phenomena and the flow properties. Finally, it provides an overview of recent advances in tunable and adaptive multifunctional materials derived from ferrofluids and a detailed presentation of the recent progress of applications in the field of sensors and actuators, ferrofluid-driven assembly and manipulation, droplet technology, including droplet generation and control, mechanical actuation, liquid computing and robotics.
Collapse
Affiliation(s)
- V Socoliuc
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research, Laboratory of Magnetic Fluids, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania.
| | - M V Avdeev
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie Str. 6, 141980 Dubna, Moscow Reg., Russia.
| | - V Kuncser
- National Institute of Materials Physics, Bucharest-Magurele, 077125, Romania
| | - Rodica Turcu
- National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), Donat Str. 67-103, 400293 Cluj-Napoca, Romania
| | - Etelka Tombácz
- University of Szeged, Faculty of Engineering, Department of Food Engineering, Moszkvai krt. 5-7, H-6725 Szeged, Hungary.
- University of Pannonia - Soós Ernő Water Technology Research and Development Center, H-8800 Zrínyi M. str. 18, Nagykanizsa, Hungary
| | - L Vékás
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research, Laboratory of Magnetic Fluids, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania.
- Politehnica University of Timisoara, Research Center for Complex Fluids Systems Engineering, Mihai Viteazul Ave. 1, 300222 Timisoara, Romania
| |
Collapse
|
3
|
Craciunescu I, Chiţanu E, Codescu MM, Iacob N, Kuncser A, Kuncser V, Socoliuc V, Susan-Resiga D, Bălănean F, Ispas G, Borbáth T, Borbáth I, Turcu R, Vékás L. High performance magnetorheological fluids: very high magnetization FeCo-Fe 3O 4 nanoclusters in a ferrofluid carrier. SOFT MATTER 2022; 18:626-639. [PMID: 34931628 DOI: 10.1039/d1sm01468d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
High magnetization Fe3O4/OA-FeCo/Al2O3 nanocomposite magnetic clusters have been obtained using a modified oil-in-water miniemulsion method. These nanocomposite clusters dispersed in a ferrofluid carrier result in a magnetorheological fluid with improved characteristics. The magnetic clusters have a magnetic core consisting of a mixture of magnetite nanoparticles of about 6 nm average size, stabilized with oleic acid (Fe3O4/OA) and FeCo/Al2O3 particles of about 50 nm average size, compactly packed in the form of spherical clusters with a diameter distribution in the range 100-300 nm and a hydrophilic coating of sodium lauryl sulphate surfactant. The surface chemical composition of the Fe3O4/OA-FeCo/Al2O3 clusters investigated by XPS indicates the presence of the Co2+ and Co3+ oxidation states of cobalt and the components of Fe2+ and Fe3+ characteristic to both an enhanced oxidation state at the surface of the FeCo particles and to the presence of magnetic nanoparticles of spinel structure which are decorating the supporting FeCo. This specific decorating morphology is also indicated by TEM images. Advanced characterization of the Fe3O4/OA-FeCo/Al2O3 magnetic clusters has been performed using Mössbauer spectroscopy and magnetization measurements at various temperatures between 6 K and 200 K. The unexpected formation of Co ferrite decorating nanoparticles was supported by Mössbauer spectroscopy. The dispersion of magnetic clusters in the ferrofluid carrier highly influences the flow properties in the absence of the field (shear thinning for low and moderate shear rates) and especially in applied magnetic field, when significant magnetoviscous effect and shear thinning was observed for the whole range of shear rate values. Detailed analysis of the magnetorheological behavior of the nanocomposite magnetic clusters dispersed in a ferrofluid carrier evidence significantly higher normalized dynamic yield stress values in comparison with the magnetite nanocluster suspensions of the same mass concentration, a promising result for this new type of nanocomposite magnetorheological fluid.
Collapse
Affiliation(s)
- Izabell Craciunescu
- National Institute for R&D of Isotopic and Molecular Technologies (INCDTIM), Donat Str. 67-103, 400293 Cluj-Napoca, Romania.
| | - Elena Chiţanu
- National R&D Institute for Electrical Engineering (ICPE-CA), Bucharest, Romania
| | - Mirela M Codescu
- National R&D Institute for Electrical Engineering (ICPE-CA), Bucharest, Romania
| | - N Iacob
- National Institute for R&D of Materials Physics (INCDFM), Bucharest-Magurele, Romania
| | - A Kuncser
- National Institute for R&D of Materials Physics (INCDFM), Bucharest-Magurele, Romania
| | - V Kuncser
- National Institute for R&D of Materials Physics (INCDFM), Bucharest-Magurele, Romania
| | - V Socoliuc
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research (CFATR), Laboratory of Magnetic Fluids, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
- Politehnica University of Timisoara, Research Center for Complex Fluids Systems Engineering, Mihai Viteazul Ave. 1, 300222 Timisoara, Romania.
| | - Daniela Susan-Resiga
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research (CFATR), Laboratory of Magnetic Fluids, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
- West University of Timisoara, Faculty of Physics, Vasile Pârvan Ave. 4, Timişoara 300223, Romania
| | - Florica Bălănean
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research (CFATR), Laboratory of Magnetic Fluids, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
| | - G Ispas
- National Institute for R&D of Isotopic and Molecular Technologies (INCDTIM), Donat Str. 67-103, 400293 Cluj-Napoca, Romania.
| | | | - I Borbáth
- ROSEAL Co., Odorheiu-Secuiesc, Romania
| | - Rodica Turcu
- National Institute for R&D of Isotopic and Molecular Technologies (INCDTIM), Donat Str. 67-103, 400293 Cluj-Napoca, Romania.
| | - L Vékás
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research (CFATR), Laboratory of Magnetic Fluids, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
- Politehnica University of Timisoara, Research Center for Complex Fluids Systems Engineering, Mihai Viteazul Ave. 1, 300222 Timisoara, Romania.
| |
Collapse
|
4
|
Nikolaou M, Avraam K, Kolokithas-Ntoukas A, Bakandritsos A, Lizal F, Misik O, Maly M, Jedelsky J, Savva I, Balanean F, Krasia-Christoforou T. Superparamagnetic electrospun microrods for magnetically-guided pulmonary drug delivery with magnetic heating. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 126:112117. [PMID: 34082934 DOI: 10.1016/j.msec.2021.112117] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 03/22/2021] [Accepted: 04/16/2021] [Indexed: 11/16/2022]
Abstract
Controlled pulmonary drug delivery systems employing non-spherical particles as drug carriers attract considerable attention nowadays. Such anisotropic morphologies may travel deeper into the lung airways, thus enabling the efficient accumulation of therapeutic compounds at the point of interest and subsequently their sustained release. This study focuses on the fabrication of electrospun superparamagnetic polymer-based biodegradable microrods consisting of poly(l-lactide) (PLLA), polyethylene oxide (PEO) and oleic acid-coated magnetite nanoparticles (OA·Fe3O4). The production of magnetite-free (0% wt. OA·Fe3O4) and magnetite-loaded (50% and 70% wt. Fe3O4) microrods was realized upon subjecting the as-prepared electrospun fibers to UV irradiation, followed by sonication. Moreover, drug-loaded microrods were fabricated incorporating methyl 4-hydroxybenzoate (MHB) as a model pharmaceutical compound and the drug release profile from both, the drug-loaded membranes and the corresponding microrods was investigated in aqueous media. In addition, the magnetic properties of the produced materials were exploited for remote induction of hyperthermia under AC magnetic field, while the possibility to reduce transport losses and enhance the targeted delivery to lower airways by manipulation of the airborne microrods by DC magnetic field was also demonstrated.
Collapse
Affiliation(s)
- Maria Nikolaou
- University of Cyprus, Department of Mechanical and Manufacturing Engineering, 75, Kallipoleos Avenue, P. O. Box 20537, 1678 Nicosia, Cyprus
| | - Kyriakos Avraam
- University of Cyprus, Department of Mechanical and Manufacturing Engineering, 75, Kallipoleos Avenue, P. O. Box 20537, 1678 Nicosia, Cyprus
| | | | - Aristides Bakandritsos
- Regional Centre of Advanced Technologies and Materials, CATRIN, Palacký University, Olomouc, Czech Republic; Nanotechnology Centre, CEET, VŠB-Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
| | - Frantisek Lizal
- Brno University of Technology, Faculty of Mechanical Engineering, Energy Institute, Technicka 2896/2, Brno 616 00, Czech Republic
| | - Ondrej Misik
- Brno University of Technology, Faculty of Mechanical Engineering, Energy Institute, Technicka 2896/2, Brno 616 00, Czech Republic
| | - Milan Maly
- Brno University of Technology, Faculty of Mechanical Engineering, Energy Institute, Technicka 2896/2, Brno 616 00, Czech Republic
| | - Jan Jedelsky
- Brno University of Technology, Faculty of Mechanical Engineering, Energy Institute, Technicka 2896/2, Brno 616 00, Czech Republic
| | - Ioanna Savva
- University of Cyprus, Department of Mechanical and Manufacturing Engineering, 75, Kallipoleos Avenue, P. O. Box 20537, 1678 Nicosia, Cyprus
| | - Florica Balanean
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research, Laboratory of Magnetic Fluids, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
| | - Theodora Krasia-Christoforou
- University of Cyprus, Department of Mechanical and Manufacturing Engineering, 75, Kallipoleos Avenue, P. O. Box 20537, 1678 Nicosia, Cyprus.
| |
Collapse
|
5
|
Köhler T, Feoktystov A, Petracic O, Kentzinger E, Bhatnagar-Schöffmann T, Feygenson M, Nandakumaran N, Landers J, Wende H, Cervellino A, Rücker U, Kovács A, Dunin-Borkowski RE, Brückel T. Mechanism of magnetization reduction in iron oxide nanoparticles. NANOSCALE 2021; 13:6965-6976. [PMID: 33885498 DOI: 10.1039/d0nr08615k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Iron oxide nanoparticles are presently considered as main work horses for various applications including targeted drug delivery and magnetic hyperthermia. Several questions remain unsolved regarding the effect of size onto their overall magnetic behavior. One aspect is the reduction of magnetization compared to bulk samples. A detailed understanding of the underlying mechanisms of this reduction could improve the particle performance in applications. Here we use a number of complementary experimental techniques including neutron scattering and synchrotron X-ray diffraction to arrive at a consistent conclusion. We confirm the observation from previous studies of a reduced saturation magnetization and argue that this reduction is mainly associated with the presence of antiphase boundaries, which are observed directly using high-resolution transmission electron microscopy and indirectly via an anisotropic peak broadening in X-ray diffraction patterns. Additionally small-angle neutron scattering with polarized neutrons revealed a small non-magnetic surface layer, that is, however, not sufficient to explain the observed loss in magnetization alone.
Collapse
Affiliation(s)
- Tobias Köhler
- Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science JCNS at Heinz Maier-Leibnitz Zentrum MLZ, 85748 Garching, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
|
7
|
Tomašovičová N, Hu PS, Zeng CL, Huráková M, Csach K, Majorošová J, Kubovčíková M, Kopčanský P. Dynamic morphogenesis of dendritic structures formation in hen egg white lysozyme fibrils doped with magnetic nanoparticles. Colloids Surf B Biointerfaces 2018; 161:457-463. [DOI: 10.1016/j.colsurfb.2017.10.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 09/22/2017] [Accepted: 10/12/2017] [Indexed: 12/16/2022]
|
8
|
Ilia R, Liatsou I, Savva I, Vasile E, Vekas L, Marinica O, Mpekris F, Pashalidis I, Krasia-Christoforou T. Magnetoresponsive polymer networks as adsorbents for the removal of U(VI) ions from aqueous media. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.10.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
9
|
Chao CG, Kumar MP, Riaz N, Khanoyan RT, Madrahimov ST, Bergbreiter DE. Polyisobutylene Oligomers as Tools for Iron Oxide Nanoparticle Solubilization. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02407] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Chih-Gang Chao
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| | - Manyam Praveen Kumar
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Nadia Riaz
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| | - Raquel T. Khanoyan
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| | | | - David E. Bergbreiter
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| |
Collapse
|
10
|
Marín T, Montoya P, Arnache O, Calderón J. Influence of Surface Treatment on Magnetic Properties of Fe3O4 Nanoparticles Synthesized by Electrochemical Method. J Phys Chem B 2016; 120:6634-45. [PMID: 27267938 DOI: 10.1021/acs.jpcb.6b01796] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The changes of magnetic properties in magnetite nanoparticles during two different stabilization processes were investigated. Magnetic nanoparticles (MNPs) were obtained by electrochemical synthesis from two kinds of salts: (CH3)4NCl and NaCl. After that, two methods-steric and electrostatic-were used to stabilize MNPs with oleic acid (OA) and sodium hydroxide (NaOH), respectively. As a consequence, aqueous and organic dispersions were obtained after surface modification. The coated nanoparticles were characterized by TEM, zeta potential, thermogravimetry analysis (TGA), cyclic voltammetry (CV), magnetization measurements, and infrared and Mössbauer spectroscopy. The results showed that the particles were between 8 and 13 nm in size. In addition, the MNPs were coated with negative charge layers from NaOH by physisorption and coated with carboxylate groups from OA by the chemisorption process, and hence, they exhibited different reactivity and behavior depending on the nature of the electrolyte used in the electrochemical synthesis. Furthermore, the uncoated and coated MNPs had a narrow size distribution. Additionally, the saturation magnetization values showed dependence on the magnetite synthesis conditions and surface modifiers.
Collapse
Affiliation(s)
- Tíffany Marín
- Centro de Investigación, Innovación y Desarrollo de Materiales - CIDEMAT, Universidad de Antioquia UdeA , Calle 70 No. 52-21, Medellín Apartado Aéreo 1226, Colombia
| | - Paula Montoya
- Centro de Investigación, Innovación y Desarrollo de Materiales - CIDEMAT, Universidad de Antioquia UdeA , Calle 70 No. 52-21, Medellín Apartado Aéreo 1226, Colombia
| | - Oscar Arnache
- Grupo de Estado Sólido, Instituto de Física, Universidad de Antioquia , Calle 70 No. 52-21, Medellín Apartado Aéreo 1226, Colombia
| | - Jorge Calderón
- Centro de Investigación, Innovación y Desarrollo de Materiales - CIDEMAT, Universidad de Antioquia UdeA , Calle 70 No. 52-21, Medellín Apartado Aéreo 1226, Colombia
| |
Collapse
|
11
|
Antifungal Activity of Amphotericin B Conjugated to Nanosized Magnetite in the Treatment of Paracoccidioidomycosis. PLoS Negl Trop Dis 2016; 10:e0004754. [PMID: 27303789 PMCID: PMC4909273 DOI: 10.1371/journal.pntd.0004754] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 05/11/2016] [Indexed: 01/12/2023] Open
Abstract
This study reports on in vitro and in vivo tests that sought to assess the antifungal activity of a newly developed magnetic carrier system comprising amphotericin B loaded onto the surface of pre-coated (with a double-layer of lauric acid) magnetite nanoparticles. The in vitro tests compared two drugs; i.e., this newly developed form and free amphotericin B. We found that this nanocomplex exhibited antifungal activity without cytotoxicity to human urinary cells and with low cytotoxicity to peritoneal macrophages. We also evaluated the efficacy of the nanocomplex in experimental paracoccidioidomycosis. BALB/c mice were intratracheally infected with Paracoccidioides brasiliensis and treated with the compound for 30 or 60 days beginning the day after infection. The newly developed amphotericin B coupled with magnetic nanoparticles was effective against experimental paracoccidioidomycosis, and it did not induce clinical, biochemical or histopathological alterations. The nanocomplex also did not induce genotoxic effects in bone marrow cells. Therefore, it is reasonable to believe that amphotericin B coupled to magnetic nanoparticles and stabilized with bilayer lauric acid is a promising nanotool for the treatment of the experimental paracoccidioidomycosis because it exhibited antifungal activity that was similar to that of free amphotericin B, did not induce adverse effects in therapeutic doses and allowed for a reduction in the number of applications. Lung fungal infections are caused by pathogens inhaled as spores which convert into invasive yeast forms in the lungs. This type of infection can spread to other sites in the body through the blood and lymphatic systems, sometimes leading to ulcerations and skin lesions. The drug of choice for treatment is Amphotericin B (AmB). AmB is a typical polyene with broad-spectrum antifungal activity that encounters some use limitations because of its side effects. We developed a magnetic carrier nanocomplex comprising of amphotericin B loaded onto the surface of magnetite nanoparticles pre-coated with a double-layer of lauric acid. We evaluated this approach for its antifungal activity against Paracoccidioides brasiliensis (strain Pb18) and its cytotoxicity in mammalian cell culture. We found that this nanocomplex exhibited antifungal activity without cytotoxicity to human urinary cells and low cytotoxicity to peritoneal macrophages. In vivo, the nanocomplex did not induce genotoxic effects in bone marrow cells and was effective against experimental paracoccidioidomycosis without inducing clinical, biochemical or histopathological alterations.
Collapse
|
12
|
Petrenko VI, Avdeev MV, Bulavin LA, Almasy L, Grigoryeva NA, Aksenov VL. Effect of surfactant excess on the stability of low-polarity ferrofluids probed by small-angle neutron scattering. CRYSTALLOGR REP+ 2016. [DOI: 10.1134/s1063774516010168] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
13
|
Eremin RA, Kholmurodov KT, Petrenko VI, Rosta L, Grigoryeva NA, Avdeev MV. On the microstructure of organic solutions of mono-carboxylic acids: Combined study by infrared spectroscopy, small-angle neutron scattering and molecular dynamics simulations. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2015.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
14
|
Coseri S, Spatareanu A, Sacarescu L, Socoliuc V, Sorin Stratulat I, Harabagiu V. Pullulan: A versatile coating agent for superparamagnetic iron oxide nanoparticles. J Appl Polym Sci 2015. [DOI: 10.1002/app.42926] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sergiu Coseri
- Petru Poni Institute of Macromolecular Chemistry of Romanian Academy; 41A Grigore Ghica Voda Alley 700487 Iasi Romania
| | - Alina Spatareanu
- Petru Poni Institute of Macromolecular Chemistry of Romanian Academy; 41A Grigore Ghica Voda Alley 700487 Iasi Romania
| | - Liviu Sacarescu
- Petru Poni Institute of Macromolecular Chemistry of Romanian Academy; 41A Grigore Ghica Voda Alley 700487 Iasi Romania
| | - Vlad Socoliuc
- Laboratory of Magnetic Fluids; Center for Fundamental and Advanced Technical Research, Romanian Academy-Timisoara Branch; 24 Mihai Viteazul Boulevard 300223 Timisoara Romania
| | - Ioan Sorin Stratulat
- Petru Poni Institute of Macromolecular Chemistry of Romanian Academy; 41A Grigore Ghica Voda Alley 700487 Iasi Romania
- Faculty of Medicine; Grigore T. Popa University of Medicine and Pharmacy; Iasi Romania
- Romanian Railroad Clinic Hospital Iasi, Rehabilitation, Physical Medicine, and Balneoclimatology Clinic (Caile Ferate Romane Hospital); Iasi 700506 Romania
| | - Valeria Harabagiu
- Petru Poni Institute of Macromolecular Chemistry of Romanian Academy; 41A Grigore Ghica Voda Alley 700487 Iasi Romania
| |
Collapse
|
15
|
Savva I, Marinica O, Papatryfonos CA, Vekas L, Krasia-Christoforou T. Evaluation of electrospun polymer–Fe3O4nanocomposite mats in malachite green adsorption. RSC Adv 2015. [DOI: 10.1039/c4ra16938g] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Magnetoactive polymer-based electrospun fibers containing Fe3O4nanoparticles, were successfully employed as adsorbents for malachite green oxalate in aqueous media.
Collapse
Affiliation(s)
- Ioanna Savva
- University of Cyprus
- Department of Mechanical and Manufacturing Engineering
- Nicosia
- Cyprus
| | - Oana Marinica
- Research Center for Engineering of Systems with Complex Fluids
- Politehnica University of Timisoara
- Timisoara
- Romania
- Faculty of Physics
| | | | - Ladislau Vekas
- Center for Fundamental and Advanced Technical Research
- Romania Academy
- Timisoara Branch
- Timisoara
- Romania
| | | |
Collapse
|
16
|
Avdeev MV. Particle interaction in polydisperse magnetic fluids: Experimental aspects of small-angle neutron scattering applications. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.05.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
17
|
Savva I, Odysseos AD, Evaggelou L, Marinica O, Vasile E, Vekas L, Sarigiannis Y, Krasia-Christoforou T. Fabrication, Characterization, and Evaluation in Drug Release Properties of Magnetoactive Poly(ethylene oxide)–Poly(l-lactide) Electrospun Membranes. Biomacromolecules 2013; 14:4436-46. [DOI: 10.1021/bm401363v] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ioanna Savva
- Department
of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, Cyprus
| | | | - Loucas Evaggelou
- Department
of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, Cyprus
| | - Oana Marinica
- Research
Center for Engineering of Systems with Complex Fluids, University ‘‘Politehnica’’ Timisoara, Timisoara, Romania
| | | | - Ladislau Vekas
- Center
for Fundamental and Advanced Technical Research, Romanian Academy, Timisoara
Branch, Timisoara, Romania
| | | | | |
Collapse
|
18
|
Eremin RA, Kholmurodov K, Petrenko VI, Rosta L, Avdeev MV. Effect of the solute–solvent interface on small-angle neutron scattering from organic solutions of short alkyl chain molecules as revealed by molecular dynamics simulation. J Appl Crystallogr 2013. [DOI: 10.1107/s002188981205131x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The problem of describing the experimental small-angle neutron scattering (SANS) from diluted solutions of saturated monocarboxylic acids with short chain lengths (myristic and stearic acids) in deuterated decalin is considered. The method of classical molecular dynamics simulation (MDS) is used to obtain the atomic number density distributions, and, as a consequence, the scattering length density (SLD) distribution in the solute–solvent interface area (about 1 nm around the acid molecules), assuming the acid molecules to be rigid and non-associated in the solutions. MDS is performed for solutions in a parallelepiped cell of 5.5 × 5.3 × 5.3 nm (one acid molecule per cell) under normal conditions. The time averaging of the obtained distributions is done over 2 ns (after the system thermalization). It is shown that a specific short-range ordering organization of the solvent molecules in the vicinity of the acid molecules has a significant effect on the scattering, which is mainly determined by a relatively large ratio between the effective size of the solvent molecule and the cross-section diameter of the acid molecule. Various approximations to the simulated SLD distributions, based on the cylinder-type symmetry of the acid molecules, are probed to achieve the best consistency with the experimental SANS curves by varying the residual incoherent background.
Collapse
|
19
|
Bouzidi L, Omonov TS, Garti N, Narine SS. Relationships between molecular structure and kinetic and thermodynamic controls in lipid systems. Part I: propensity for oil loss of saturated triacylglycerols. Food Funct 2012; 4:130-43. [PMID: 23070069 DOI: 10.1039/c2fo30164d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pure saturated triacylglycerols (TAGs) in canola oil were used as model systems to analyse oil loss in structured oil both from thermodynamic and kinetic perspectives. Two important parameters which effectively and predictively measure the relative propensity of a solid network to lose/hold oil were defined: (1) the rate of oil loss, K, which is a quantified representation of the kinetics of oil loss and (2) the initial amount of oil susceptible to be lost, i.e., the propensity for oil loss (POL), which is a representation of the thermodynamics of oil binding. It was found that the POL and K values do not always trend in the same fashion, suggesting that the mechanism of oil binding is complex, depending on the structurant's crystalline form locked within the oil network. The two parameters were, however, correlated to the melting and thermal behavior of the structurants, to the polymorphic structures that are obtained during the cooling process and to the habit (shape, size and morphology) of the crystalline phase in the oil. Both POL and K had a strong correlation to the oil loss.
Collapse
Affiliation(s)
- Laziz Bouzidi
- Trent Centre for Biomaterials Research, Physics & Astronomy and Chemistry Departments, Trent University, Peterborough, Ontario K9J 7B8, Canada
| | | | | | | |
Collapse
|
20
|
Papaphilippou P, Christodoulou M, Marinica OM, Taculescu A, Vekas L, Chrissafis K, Krasia-Christoforou T. Multiresponsive polymer conetworks capable of responding to changes in pH, temperature, and magnetic field: synthesis, characterization, and evaluation of their ability for controlled uptake and release of solutes. ACS APPLIED MATERIALS & INTERFACES 2012; 4:2139-2147. [PMID: 22452509 DOI: 10.1021/am300144w] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This study deals with the preparation of novel multiresponsive (magnetoresponsive, thermoresponsive and pH-responsive) nanocomposite conetworks consisting of oleic acid-coated magnetite nanoparticles (OA·Fe(3)O(4)), hydrophilic/thermoresponsive hexa(ethylene glycol) methyl ether methacrylate (HEGMA), hydrophobic/metal binding 2-(acetoacetoxy)ethyl methacrylate (AEMA), and pH-responsive/thermoresponsive N-diethylaminoethyl methacrylate (DEAEMA) and 2-(dimethylamino)ethyl methacrylate (DMAEMA) moieties. Conventional free radical copolymerization was employed for the synthesis of random conetworks in the absence and presence of preformed OA·Fe(3)O(4). Further, in characterization of these materials in regards to their swelling behavior in organic and aqueous solvents, thermal/thermoresponsive properties, and composition, assessment of their magnetic characteristics disclosed tunable superparamagnetic behavior. These systems were also evaluated toward their ability to adsorb and release a solute (benzoic acid) in a controlled manner upon varying the pH.
Collapse
Affiliation(s)
- Petri Papaphilippou
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, Cyprus
| | | | | | | | | | | | | |
Collapse
|
21
|
The influence of particle clustering on the rheological properties of highly concentrated magnetic nanofluids. J Colloid Interface Sci 2011; 373:110-5. [PMID: 22134213 DOI: 10.1016/j.jcis.2011.10.060] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 10/07/2011] [Accepted: 10/27/2011] [Indexed: 11/22/2022]
Abstract
In this paper the particle volume fraction and temperature dependence of the dynamic viscosity of highly concentrated transformer oil based magnetic nanofluids was investigated in the absence of an external magnetic field. The solid particle volume fraction dependence of the relative viscosity was found to be very well fitted by the Krieger-Dougherty formula, whence the mean ellipticity of the colloidal particles and the effective surfactant layer thickness were obtained. Using the information on the particles' size and shape statistics obtained from TEM, DLS and magnetogranulometry investigations, it was concluded that the magnetite nanoparticles agglomerate in small clusters of about 1.3 particles/cluster, due to the van der Waals interactions. The effective thickness of the oleic acid surfactant layer was estimated as about 1.4 nm, in very good agreement with the value resulted from previous SANS investigations.
Collapse
|
22
|
Aksenov VL, Avdeev MV, Shulenina AV, Zubavichus YV, Veligzhanin AA, Rosta L, Garamus VM, Vekas L. Neutron and synchrotron radiation scattering by nonpolar magnetic fluids. CRYSTALLOGR REP+ 2011. [DOI: 10.1134/s1063774511050026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
23
|
Avdeev MV, Feoktystov AV, Kopcansky P, Lancz G, Garamus VM, Willumeit R, Timko M, Koneracka M, Zavisova V, Tomasovicova N, Jurikova A, Csach K, Bulavin LA. Structure of water-based ferrofluids with sodium oleate and polyethylene glycol stabilization by small-angle neutron scattering: contrast-variation experiments. J Appl Crystallogr 2010. [DOI: 10.1107/s0021889810025379] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Contrast variation in small-angle neutron scattering (SANS) experiments is used to compare the structures of a water-based ferrofluid, where magnetite nanoparticles are stabilized by sodium oleate, and its mixture with biocompatible polyethylene glycol, PEG. The basic functions approach is applied, which takes into account the effects of polydispersity and magnetic scattering. Different types of stable aggregates of colloidal particles are revealed in both fluids. The addition of PEG results in a reorganization of the structure of the aggregates: the initial comparatively small and compact aggregates (about 40 nm in size) are replaced by large (more than 120 nm in size) fractal-type structures. It is postulated that these large structures are composed of single magnetite particles coated with PEG, which replaces sodium oleate. Micelle formation involving free sodium oleate is observed in both fluids. The structures of the fluids remain unchanged with increasing temperature up to 343 K. New and specific possibilities of SANS contrast variation with respect to multicomponent systems with different aggregates are considered.
Collapse
|
24
|
Avdeev MV, Mucha B, Lamszus K, Vékás L, Garamus VM, Feoktystov AV, Marinica O, Turcu R, Willumeit R. Structure and in vitro biological testing of water-based ferrofluids stabilized by monocarboxylic acids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:8503-8509. [PMID: 20131866 DOI: 10.1021/la904471f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Water-based ferrofluids (magnetic fluids) with double-layer steric stabilization by short monocarboxylic acids (lauric and myristic acids) are considered to be a potential source of magnetic nanoparticles in brain cancer (glioblastoma) treatment. Structure characterization in the absence of an external magnetic field is performed, including transmission electron microscopy, magnetization analysis, and small-angle neutron scattering with contrast variation. It is shown that despite the good stability of the systems a significant part of the magnetite nanoparticles are in aggregates, whose inner structure depends on the stabilizer used. In particular, an incomplete coating of magnetite particles is concluded in the case of myristic acid stabilization. The ferrofluids keep their structure unchanged when added to the cancer cell medium. The intracellular accumulations of magnetite from the ferrofluids added to cancer cell cultures as well as its cytotoxicity with respect to human brain cells are investigated.
Collapse
Affiliation(s)
- Mikhail V Avdeev
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
| | | | | | | | | | | | | | | | | |
Collapse
|