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Singh S, Goel T, Singh A, Chugh H, Chakraborty N, Roy I, Tiwari M, Chandra R. Synthesis and characterization of Fe 3O 4@SiO 2@PDA@Ag core-shell nanoparticles and biological application on human lung cancer cell line and antibacterial strains. ARTIFICIAL CELLS, NANOMEDICINE, AND BIOTECHNOLOGY 2024; 52:46-58. [PMID: 38156875 DOI: 10.1080/21691401.2023.2295534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 12/06/2023] [Indexed: 01/03/2024]
Abstract
Novel magnetic and metallic nanoparticles garner much attention of researchers due to their biological, chemical and catalytic properties in many chemical reactions. In this study, we have successfully prepared a core-shell Fe3O4@SiO2@PDA nanocomposite wrapped with Ag using a simple synthesis method, characterised and tested on small cell lung cancer and antibacterial strains. Incorporating Ag in Fe3O4@SiO2@PDA provides promising advantages in biomedical applications. The magnetic Fe3O4 nanoparticles were coated with SiO2 to obtain negatively charged surface which is then coated with polydopamine (PDA). Then silver nanoparticles were assembled on Fe3O4@SiO2@PDA surface, which results in the formation core-shell nanocomposite. The synthesised nanocomposite were characterized using SEM-EDAX, dynamic light scattering, XRD, FT-IR and TEM. In this work, we report the anticancer activity of silver nanoparticles against H1299 lung cancer cell line using MTT assay. The cytotoxicity data revealed that the IC50 of Fe3O4@SiO2@PDA@Ag against H1299 lung cancer nanocomposites cells was 21.52 µg/mL. Furthermore, the biological data of nanocomposites against Gram-negative 'Pseudomonas aeruginosa' and Gram-positive 'Staphylococcus aureus' were carried out. The range of minimum inhibitory concentration was found to be 115 µg/mL where gentamicin was used as a standard drug. The synthesized AgNPs proves its supremacy as an efficient biomedical agent and AgNPs may act as potential beneficial molecule in lung cancer chemoprevention and antibacterial strains.
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Affiliation(s)
- Snigdha Singh
- Department of Chemistry, University of Delhi, Delhi, India
| | - Tanya Goel
- Department of Chemistry, University of Delhi, Delhi, India
- Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Aarushi Singh
- Department of Chemistry, University of Delhi, Delhi, India
- Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Heerak Chugh
- Department of Chemistry, University of Delhi, Delhi, India
| | | | - Indrajit Roy
- Department of Chemistry, University of Delhi, Delhi, India
| | - Manisha Tiwari
- Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Ramesh Chandra
- Department of Chemistry, University of Delhi, Delhi, India
- Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
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Romdoni Y, Prasedya ES, Kadja GTM, Kitamoto Y, Khalil M. Efficient delivery of anticancer drugs using functionalized-Ag-decorated Fe 3O 4@SiO 2 nanocarrier with folic acid and β-cyclodextrin. Biochim Biophys Acta Gen Subj 2024; 1868:130643. [PMID: 38797254 DOI: 10.1016/j.bbagen.2024.130643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 04/21/2024] [Accepted: 05/22/2024] [Indexed: 05/29/2024]
Abstract
Nanocarrier surface functionalization has been widely regarded as a promising approach for achieving precise and targeted drug delivery systems. In this work, the fabrication of functionalized-Ag-decorated Fe3O4@SiO2 (Fe3O4@SiO2-Ag) nanocarriers with folic acid (FA) and β-cyclodextrin (BCD) exhibit a remarkable capacity for delivering two types of anticancer drugs, i.e., doxorubicin (DOX) and epirubicin (EPI), into cancer cells. The effective functionalization of Fe3O4@SiO2-Ag nanoparticles has been achieved through the use of cysteine (Cys) as an anchor for attaching FA and BCD via EDC-NHS coupling and Steglich esterification methods, respectively. The findings indicate that surface functionalization had no significant impact on the physicochemical characteristics of the nanoparticles. However, it notably affected DOX and EPI loading and release efficiency. The electrostatic conjugation of DOX/EPI onto the surface of Fe3O4@SiO2-Ag/Cys/FA and Fe3O4@SiO2-Ag/Cys/BCD exhibited maximum loading efficiency of 50-60% at concentration ratio of DOX/EPI to nanoparticles of 1:14. These nanocarriers also achieved an 40-47% DOX/EPI release over 36 days. Furthermore, the drug-loaded functionalized-nanocarrier showed cytotoxic effects on SK-MEL-2 cells, as demonstrated by an in vitro MTT assay. This suggests that the as-prepared functionalized-nanoparticles have promise as a carrier for the efficient anticancer drugs.
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Affiliation(s)
- Yoga Romdoni
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, 16424 Depok, West Java, Indonesia; Low Dimension Materials Lab., Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, 16424 Depok, West Java, Indonesia
| | - Eka Sunarwidhi Prasedya
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Mataram, 83125 Lombok, West Nusa Tenggara, Indonesia; Bioscience and Biotechnology Research Center, Faculty of Mathematics and Natural Sciences, University of Mataram, 83125 Lombok, West Nusa Tenggara, Indonesia
| | - Grandprix T M Kadja
- Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung 40132, Indonesia; Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung 40132, Indonesia; Center for Catalysis and Reaction Engineering, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung 40132, Indonesia
| | - Yoshitaka Kitamoto
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama 226-8502, Japan
| | - Munawar Khalil
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, 16424 Depok, West Java, Indonesia; Low Dimension Materials Lab., Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, 16424 Depok, West Java, Indonesia.
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Nasaj M, Farmany A, Shokoohizadeh L, Jalilian FA, Mahjoub R, Roshanaei G, Nourian A, Shayesteh OH, Arabestani M. Vancomycin and nisin-modified magnetic Fe 3O 4@SiO 2 nanostructures coated with chitosan to enhance antibacterial efficiency against methicillin resistant Staphylococcus aureus (MRSA) infection in a murine superficial wound model. BMC Chem 2024; 18:43. [PMID: 38395982 PMCID: PMC10893753 DOI: 10.1186/s13065-024-01129-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 01/16/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND The objective of this research was to prepare some Fe3O4@SiO2@Chitosan (CS) magnetic nanocomposites coupled with nisin, and vancomycin to evaluate their antibacterial efficacy under both in vitro and in vivo against the methicillin-resistant Staphylococcus. aureus (MRSA). METHODS In this survey, the Fe3O4@SiO2 magnetic nanoparticles (MNPs) were constructed as a core and covered the surface of MNPs via crosslinking CS by glutaraldehyde as a shell, then functionalized with vancomycin and nisin to enhance the inhibitory effects of nanoparticles (NPs). X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscope (FE-SEM), vibrating sample magnetometer (VSM), and dynamic light scattering (DLS) techniques were then used to describe the nanostructures. RESULTS Based on the XRD, and FE-SEM findings, the average size of the modified magnetic nanomaterials were estimated to be around 22-35 nm, and 34-47 nm, respectively. The vancomycin was conjugated in three polymer-drug ratios; 1:1, 2:1 and 3:1, with the percentages of 45.52%, 35.68%, and 24.4%, respectively. The polymer/drug ratio of 1:1 exhibited the slowest release rate of vancomycin from the Fe3O4@SiO2@CS-VANCO nanocomposites during 24 h, which was selected to examine their antimicrobial effects under in vivo conditions. The nisin was grafted onto the nanocomposites at around 73.2-87.2%. All the compounds resulted in a marked reduction in the bacterial burden (P-value < 0.05). CONCLUSION The vancomycin-functionalized nanocomposites exhibited to be more efficient in eradicating the bacterial cells both in vitro and in vivo. These findings introduce a novel bacteriocin-metallic nanocomposite that can suppress the normal bacterial function on demand for the treatment of MRSA skin infections.
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Affiliation(s)
- Mona Nasaj
- Department of Microbiology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Islamic Republic of Iran
| | - Abbas Farmany
- Dental Research Center, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Islamic Republic of Iran
| | - Leili Shokoohizadeh
- Department of Microbiology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Islamic Republic of Iran
| | - Farid Aziz Jalilian
- Department of Virology, Faculty of Medicine, Hamadan University of Medical Sciences, Shahid Fahmideh Street, Park Mardome, Hamadan, Islamic Republic of Iran
| | - Reza Mahjoub
- Department of Pharmacology and Toxicology, School of Pharmacy, Medicinal Plants and Natural Products Research Center, Hamadan University of Medical Sciences, Hamadan, Islamic Republic of Iran
| | - Ghodratollah Roshanaei
- Department of Biostatistics, School of Health, Hamadan University of Medical Sciences, Shahid Fahmideh Street, Park Mardome, Hamadan, Islamic Republic of Iran
| | - Alireza Nourian
- Department of Pathobiology, School of Veterinary Science, Bu-Ali Sina University, Hamedan, Islamic Republic of Iran
| | - Omid Heydari Shayesteh
- Department of Medicinal Chemistry, School of Pharmacy, Hamadan University of Medical Sciences, Hamadan, Islamic Republic of Iran
| | - Mohammadreza Arabestani
- Department of Microbiology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Islamic Republic of Iran.
- Infectious Disease Research Center, Hamadan University of Medical Sciences, Hamadan, Islamic Republic of Iran.
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Synthesis of CoFe2O4 @Amino glycol/Gd nanocomposite as a high-efficiency and reusable nanocatalyst for green oxidation of sulfides and synthesis of 5-substituted 1H-tetrazoles. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wu K, Liu J, Chugh VK, Liang S, Saha R, Krishna VD, Cheeran MCJ, Wang JP. Magnetic nanoparticles and magnetic particle spectroscopy-based bioassays: a 15 year recap. NANO FUTURES 2022; 6:022001. [PMID: 36199556 PMCID: PMC9531898 DOI: 10.1088/2399-1984/ac5cd1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Magnetic nanoparticles (MNPs) have unique physical and chemical properties, such as high surface area to volume ratio and size-related magnetism, which are completely different from their bulk materials. Benefiting from the facile synthesis and chemical modification strategies, MNPs have been widely studied for applications in nanomedicine. Herein, we firstly summarized the designs of MNPs from the perspectives of materials and physicochemical properties tailored for biomedical applications. Magnetic particle spectroscopy (MPS), first reported in 2006, has flourished as an independent platform for many biological and biomedical applications. It has been extensively reported as a versatile platform for a variety of bioassays along with the artificially designed MNPs, where the MNPs serve as magnetic nanoprobes to specifically probe target analytes from fluid samples. In this review, the mechanisms and theories of different MPS platforms realizing volumetric- and surface-based bioassays are discussed. Some representative works of MPS platforms for applications such as disease diagnosis, food safety and plant pathology monitoring, drug screening, thrombus maturity assessments are reviewed. At the end of this review, we commented on the rapid growth and booming of MPS-based bioassays in its first 15 years. We also prospected opportunities and challenges that portable MPS devices face in the rapidly growing demand for fast, inexpensive, and easy-to-use biometric techniques.
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Affiliation(s)
- Kai Wu
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, United States of America
| | - Jinming Liu
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, United States of America
| | - Vinit Kumar Chugh
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, United States of America
| | - Shuang Liang
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, United States of America
| | - Renata Saha
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, United States of America
| | - Venkatramana D Krishna
- Department of Veterinary Population Medicine, University of Minnesota, St Paul, MN 55108, United States of America
| | - Maxim C-J Cheeran
- Department of Veterinary Population Medicine, University of Minnesota, St Paul, MN 55108, United States of America
| | - Jian-Ping Wang
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, United States of America
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, United States of America
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Magnetic Core-Shell Iron Oxides-Based Nanophotocatalysts and Nanoadsorbents for Multifunctional Thin Films. MEMBRANES 2022; 12:membranes12050466. [PMID: 35629792 PMCID: PMC9144956 DOI: 10.3390/membranes12050466] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 04/12/2022] [Accepted: 04/19/2022] [Indexed: 02/01/2023]
Abstract
In recent years, iron oxides-based nanostructured composite materials are of particular interest for the preparation of multifunctional thin films and membranes to be used in sustainable magnetic field adsorption and photocatalysis processes, intelligent coatings, and packing or bio-medical applications. In this paper, superparamagnetic iron oxide (core)-silica (shell) nanoparticles suitable for thin films and membrane functionalization were obtained by co-precipitation and ultrasonic-assisted sol-gel methods. The comparative/combined effect of the magnetic core co-precipitation temperature (80 and 95 °C) and ZnO-doping of the silica shell on the photocatalytic and nano-sorption properties of the resulted composite nanoparticles were investigated by ultraviolet-visible (UV-VIS) spectroscopy monitoring the discoloration of methylene blue (MB) solution under ultraviolet (UV) irradiation and darkness, respectively. The morphology, structure, textural, and magnetic parameters of the investigated powders were evidenced by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, Brunauer–Emmett–Teller (BET) measurements, and saturation magnetization (vibrating sample magnetometry, VSM). The intraparticle diffusion model controlled the MB adsorption. The pseudo- and second-order kinetics described the MB photodegradation. When using SiO2-shell functionalized nanoparticles, the adsorption and photodegradation constant rates are three–four times higher than for using starting core iron oxide nanoparticles. The obtained magnetic nanoparticles (MNPs) were tested for films deposition.
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Iacoviță C, Fizeșan I, Nitica S, Florea A, Barbu-Tudoran L, Dudric R, Pop A, Vedeanu N, Crisan O, Tetean R, Loghin F, Lucaciu CM. Silica Coating of Ferromagnetic Iron Oxide Magnetic Nanoparticles Significantly Enhances Their Hyperthermia Performances for Efficiently Inducing Cancer Cells Death In Vitro. Pharmaceutics 2021; 13:2026. [PMID: 34959308 PMCID: PMC8706665 DOI: 10.3390/pharmaceutics13122026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/19/2021] [Accepted: 11/24/2021] [Indexed: 12/02/2022] Open
Abstract
Increasing the biocompatibility, cellular uptake, and magnetic heating performance of ferromagnetic iron-oxide magnetic nanoparticles (F-MNPs) is clearly required to efficiently induce apoptosis of cancer cells by magnetic hyperthermia (MH). Thus, F-MNPs were coated with silica layers of different thicknesses via a reverse microemulsion method, and their morphological, structural, and magnetic properties were evaluated by multiple techniques. The presence of a SiO2 layer significantly increased the colloidal stability of F-MNPs, which also enhanced their heating performance in water with almost 1000 W/gFe as compared to bare F-MNPs. The silica-coated F-MNPs exhibited biocompatibility of up to 250 μg/cm2 as assessed by Alamar Blues and Neutral Red assays on two cancer cell lines and one normal cell line. The cancer cells were found to internalize a higher quantity of silica-coated F-MNPs, in large endosomes, dispersed in the cytoplasm or inside lysosomes, and hence were more sensitive to in vitro MH treatment compared to the normal ones. Cellular death of more than 50% of the malignant cells was reached starting at a dose of 31.25 μg/cm2 and an amplitude of alternating magnetic field of 30 kA/m at 355 kHz.
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Affiliation(s)
- Cristian Iacoviță
- Department of Pharmaceutical Physics-Biophysics, Faculty of Pharmacy, “Iuliu Hatieganu” University of Medicine and Pharmacy, 6 Pasteur St., 400349 Cluj-Napoca, Romania; (C.I.); (S.N.); (N.V.)
| | - Ionel Fizeșan
- Department of Toxicology, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 6A Pasteur St., 400349 Cluj-Napoca, Romania; (I.F.); (A.P.); (F.L.)
| | - Stefan Nitica
- Department of Pharmaceutical Physics-Biophysics, Faculty of Pharmacy, “Iuliu Hatieganu” University of Medicine and Pharmacy, 6 Pasteur St., 400349 Cluj-Napoca, Romania; (C.I.); (S.N.); (N.V.)
| | - Adrian Florea
- Department of Cell and Molecular Biology, Faculty of Medicine, “Iuliu Hatieganu” University of Medicine and Pharmacy, 6 Pasteur St., 400349 Cluj-Napoca, Romania
| | - Lucian Barbu-Tudoran
- Electron Microscopy Center “Prof. C. Craciun”, Faculty of Biology & Geology, “Babes-Bolyai” University, 5-7 Clinicilor St., 400006 Cluj-Napoca, Romania;
- Electron Microscopy Integrated Laboratory, National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donath St., 400293 Cluj-Napoca, Romania
| | - Roxana Dudric
- Faculty of Physics, “Babes Bolyai” University, Kogalniceanu 1, 400084 Cluj-Napoca, Romania; (R.D.); (R.T.)
| | - Anca Pop
- Department of Toxicology, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 6A Pasteur St., 400349 Cluj-Napoca, Romania; (I.F.); (A.P.); (F.L.)
| | - Nicoleta Vedeanu
- Department of Pharmaceutical Physics-Biophysics, Faculty of Pharmacy, “Iuliu Hatieganu” University of Medicine and Pharmacy, 6 Pasteur St., 400349 Cluj-Napoca, Romania; (C.I.); (S.N.); (N.V.)
| | - Ovidiu Crisan
- Department of Organic Chemistry, “Iuliu Hațieganu” University of Medicine and Pharmacy, 41 Victor Babes St., 400012 Cluj-Napoca, Romania;
| | - Romulus Tetean
- Faculty of Physics, “Babes Bolyai” University, Kogalniceanu 1, 400084 Cluj-Napoca, Romania; (R.D.); (R.T.)
| | - Felicia Loghin
- Department of Toxicology, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 6A Pasteur St., 400349 Cluj-Napoca, Romania; (I.F.); (A.P.); (F.L.)
| | - Constantin Mihai Lucaciu
- Department of Pharmaceutical Physics-Biophysics, Faculty of Pharmacy, “Iuliu Hatieganu” University of Medicine and Pharmacy, 6 Pasteur St., 400349 Cluj-Napoca, Romania; (C.I.); (S.N.); (N.V.)
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Magnetite-Silica Core/Shell Nanostructures: From Surface Functionalization towards Biomedical Applications—A Review. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112211075] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The interconnection of nanotechnology and medicine could lead to improved materials, offering a better quality of life and new opportunities for biomedical applications, moving from research to clinical applications. Magnetite nanoparticles are interesting magnetic nanomaterials because of the property-depending methods chosen for their synthesis. Magnetite nanoparticles can be coated with various materials, resulting in “core/shell” magnetic structures with tunable properties. To synthesize promising materials with promising implications for biomedical applications, the researchers functionalized magnetite nanoparticles with silica and, thanks to the presence of silanol groups, the functionality, biocompatibility, and hydrophilicity were improved. This review highlights the most important synthesis methods for silica-coated with magnetite nanoparticles. From the presented methods, the most used was the Stöber method; there are also other syntheses presented in the review, such as co-precipitation, sol-gel, thermal decomposition, and the hydrothermal method. The second part of the review presents the main applications of magnetite-silica core/shell nanostructures. Magnetite-silica core/shell nanostructures have promising biomedical applications in magnetic resonance imaging (MRI) as a contrast agent, hyperthermia, drug delivery systems, and selective cancer therapy but also in developing magnetic micro devices.
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Baharfar R, Peiman S, Maleki B.
Fe
3
O
4
@
SiO
2
@
D‐NHCS‐Tr
as an efficient and reusable catalyst for the synthesis of
indol‐3‐yl‐4
H
‐chromene via a multi‐component reaction under solvent‐free conditions. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Robabeh Baharfar
- Department of Organic Chemistry, Faculty of Chemistry University of Mazandaran Babolsar Iran
| | - Sahar Peiman
- Department of Organic Chemistry, Faculty of Chemistry University of Mazandaran Babolsar Iran
| | - Behrooz Maleki
- Department of Chemistry Hakim Sabzevari University Sabzevar Iran
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Mourdikoudis S, Kostopoulou A, LaGrow AP. Magnetic Nanoparticle Composites: Synergistic Effects and Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2004951. [PMID: 34194936 PMCID: PMC8224446 DOI: 10.1002/advs.202004951] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Indexed: 05/17/2023]
Abstract
Composite materials are made from two or more constituent materials with distinct physical or chemical properties that, when combined, produce a material with characteristics which are at least to some degree different from its individual components. Nanocomposite materials are composed of different materials of which at least one has nanoscale dimensions. Common types of nanocomposites consist of a combination of two different elements, with a nanoparticle that is linked to, or surrounded by, another organic or inorganic material, for example in a core-shell or heterostructure configuration. A general family of nanoparticle composites concerns the coating of a nanoscale material by a polymer, SiO2 or carbon. Other materials, such as graphene or graphene oxide (GO), are used as supports forming composites when nanoscale materials are deposited onto them. In this Review we focus on magnetic nanocomposites, describing their synthetic methods, physical properties and applications. Several types of nanocomposites are presented, according to their composition, morphology or surface functionalization. Their applications are largely due to the synergistic effects that appear thanks to the co-existence of two different materials and to their interface, resulting in properties often better than those of their single-phase components. Applications discussed concern magnetically separable catalysts, water treatment, diagnostics-sensing and biomedicine.
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Affiliation(s)
- Stefanos Mourdikoudis
- Biophysics GroupDepartment of Physics and AstronomyUniversity College LondonLondonWC1E 6BTUK
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories21 Albemarle StreetLondonW1S 4BSUK
| | - Athanasia Kostopoulou
- Institute of Electronic Structure and Laser (IESL)Foundation for Research and Technology‐Hellas (FORTH)100 Nikolaou PlastiraHeraklionCrete70013Greece
| | - Alec P. LaGrow
- International Iberian Nanotechnology LaboratoryBraga4715‐330Portugal
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Hai NTT, Cuong ND, Quyen NT, Hien NQ, Hien TTD, Phung NTT, Toan DK, Huong NTT, Phu DV, Hoa TT. Facile Synthesis of Carboxymethyl Cellulose Coated Core/Shell SiO 2@Cu Nanoparticles and Their Antifungal Activity against Phytophthora capsici. Polymers (Basel) 2021; 13:888. [PMID: 33799328 PMCID: PMC8001355 DOI: 10.3390/polym13060888] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 03/07/2021] [Accepted: 03/08/2021] [Indexed: 11/18/2022] Open
Abstract
Cu nanoparticles are a potential material for creating novel alternative antimicrobial products due to their unique antibacterial/antifungal properties, stability, dispersion, low cost and abundance as well as being economical and ecofriendly. In this work, carboxymethyl cellulose coated core/shell SiO2@Cu nanoparticles (NPs) were synthesized by a simple and effective chemical reduction process. The initial SiO2 NPs, which were prepared from rice husk ash, were coated by a copper ultrathin film using hydrazine and carboxymethyl cellulose (CMC) as reducing agent and stable agent, respectively. The core/shell SiO2@Cu nanoparticles with an average size of ~19 nm were surrounded by CMC. The results indicated that the SiO2@Cu@CMC suspension was a homogenous morphology with a spherical shape, regular dispersion and good stability. Furthermore, the multicomponent SiO2@Cu@CMC NPs showed good antifungal activity against Phytophthora capsici (P. capsici). The novel Cu NPs-based multicomponent suspension is a key compound in the development of new fungicides for the control of the Phytophthora disease.
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Affiliation(s)
- Nguyen Thi Thanh Hai
- Department of Chemistry, University of Sciences, Hue University, 77 Nguyen Hue Street, Hue City 530000, Vietnam; (N.T.T.H.); (D.K.T.); (N.T.T.H.)
| | - Nguyen Duc Cuong
- Department of Chemistry, University of Sciences, Hue University, 77 Nguyen Hue Street, Hue City 530000, Vietnam; (N.T.T.H.); (D.K.T.); (N.T.T.H.)
- School of Hospitality and Tourism, Hue University, 22 Lam Hoang Street, Hue City 530000, Vietnam
| | - Nguyen Tran Quyen
- Pepper Research and Development Center, Pleiku City 600000, Vietnam; (N.T.Q.); (T.T.D.H.); (N.T.T.P.)
| | - Nguyen Quoc Hien
- Research and Development Center for Radiation Technology, Viet Nam Atomic Energy Institute, Ho Chi Minh City 700000, Vietnam; (N.Q.H.); (D.V.P.)
| | - Tran Thi Dieu Hien
- Pepper Research and Development Center, Pleiku City 600000, Vietnam; (N.T.Q.); (T.T.D.H.); (N.T.T.P.)
| | - Nguyen Thi Thanh Phung
- Pepper Research and Development Center, Pleiku City 600000, Vietnam; (N.T.Q.); (T.T.D.H.); (N.T.T.P.)
| | - Dao Khac Toan
- Department of Chemistry, University of Sciences, Hue University, 77 Nguyen Hue Street, Hue City 530000, Vietnam; (N.T.T.H.); (D.K.T.); (N.T.T.H.)
- Nguyen Binh Khiem High School, Chu Se District, Pleiku City 600000, Vietnam
| | - Nguyen Thi Thu Huong
- Department of Chemistry, University of Sciences, Hue University, 77 Nguyen Hue Street, Hue City 530000, Vietnam; (N.T.T.H.); (D.K.T.); (N.T.T.H.)
| | - Dang Van Phu
- Research and Development Center for Radiation Technology, Viet Nam Atomic Energy Institute, Ho Chi Minh City 700000, Vietnam; (N.Q.H.); (D.V.P.)
| | - Tran Thai Hoa
- Department of Chemistry, University of Sciences, Hue University, 77 Nguyen Hue Street, Hue City 530000, Vietnam; (N.T.T.H.); (D.K.T.); (N.T.T.H.)
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Deeprasert S, Wang L, Simeonidis K, Kim Thanh NT, Duguet E, Mourdikoudis S. Dimpled SiO 2@γ-Fe 2O 3 nanocomposites - fabrication and use for arsenic adsorption in aqueous medium. RSC Adv 2021; 11:1343-1353. [PMID: 35424114 PMCID: PMC8693525 DOI: 10.1039/d0ra09907d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 12/16/2020] [Indexed: 12/17/2022] Open
Abstract
We report the synthesis of nanocomposites made of silica nanoparticles whose six surface dimples are decorated with magnetic maghemite nanoparticles and their use for detection and recovery of arsenic in aqueous media. Precursor silica nanoparticles have aminated polystyrene chains at the bottom of their dimples and the maghemite nanoparticles are surface functionalized with carboxylic acid groups in two steps: amination with 3-aminopropyltrimethoxysilane, then derivatization with succinic anhydride in the presence of triethylamine. In the end, the colloidal assembly consists of the regioselective grafting of the carboxylic acid-modified iron oxide nanoparticles onto the 6-dimple silica nanoparticles. Several characterization techniques such as transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) are employed to assess the grafting process and study the influence of the maghemite functional groups on the quality of the composites formed. The resulting magnetic nanocomposites are used for the environmentally benign detection and removal of arsenic from aqueous medium, being readily extracted through means of magnetic separation.
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Affiliation(s)
- Saruta Deeprasert
- Biophysics Group, Department of Physics and Astronomy, University College London London WC1E 6BT UK
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories 21 Albemarle Street London W1S 4BS UK
| | - Lilin Wang
- Biophysics Group, Department of Physics and Astronomy, University College London London WC1E 6BT UK
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories 21 Albemarle Street London W1S 4BS UK
| | | | - Nguyen Thi Kim Thanh
- Biophysics Group, Department of Physics and Astronomy, University College London London WC1E 6BT UK
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories 21 Albemarle Street London W1S 4BS UK
| | - Etienne Duguet
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026 F-33600 Pessac France
| | - Stefanos Mourdikoudis
- Biophysics Group, Department of Physics and Astronomy, University College London London WC1E 6BT UK
- UCL Healthcare Biomagnetic and Nanomaterials Laboratories 21 Albemarle Street London W1S 4BS UK
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13
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Abboud M, Bondock S, El‐Zahhar AA, Alghamdi MM, Keshk SMAS. Synthesis and characterization of dialdehyde cellulose/amino‐functionalized
MCM
‐41 c
ore‐shell
microspheres as a new eco‐friendly flame‐retardant nanocomposite. J Appl Polym Sci 2020. [DOI: 10.1002/app.50215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Mohamed Abboud
- Catalysis Research Group (CRG), Department of Chemistry, College of Science King Khalid University Abha Saudi Arabia
| | - Samir Bondock
- Department of Chemistry, College of Science King Khalid University Abha Saudi Arabia
- Department of Chemistry, Faculty of Science Mansoura University Mansoura Egypt
| | - Adel A. El‐Zahhar
- Department of Chemistry, College of Science King Khalid University Abha Saudi Arabia
| | - Majed M. Alghamdi
- Department of Chemistry, College of Science King Khalid University Abha Saudi Arabia
| | - Sherif M. A. S. Keshk
- Nanomaterials and Systems for Renewable Energy Laboratory, Research and Technology Center of Energy Hammam Lif Tunisia
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14
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Onoja E, Wahab RA. Robust Magnetized Oil Palm Leaves Ash Nanosilica Composite as Lipase Support: Immobilization Protocol and Efficacy Study. Appl Biochem Biotechnol 2020; 192:585-599. [PMID: 32495234 DOI: 10.1007/s12010-020-03348-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 05/22/2020] [Indexed: 12/07/2022]
Abstract
Strategies to immobilize the individual enzymes are crucial for enhancing catalytic applicability and require a controlled immobilization process. Herein, protocol for immobilizing Candida rugosa lipase (CRL) onto modified magnetic silica derived from oil palm leaves ash (OPLA) was optimized for the effects of concentration of CRL, immobilization time, and temperature, monitored by titrimetric and spectrometric methods. XRD and TGA-DTG spectrometric observations indicated that OPLA-silica was well coated over magnetite (SiO2-MNPs) and CRLs were uniformly bound by covalent bonds to SiO2-MNPs (CRL/Gl-A-SiO2-MNPs). The optimized immobilization protocol showed that in the preparation of CRL/Gl-A-SiO2-MNPs, CRL with 68.3 mg/g protein loading and 74.6 U/g specific activity was achieved using 5 mg/mL of CRL, with an immobilization time of 12 h at 25 °C. The present work also demonstrated that acid-pretreated OPLA is a potential source of renewable silica, envisioning its applicability for practical use in enzymatic catalysis on solid support.
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Affiliation(s)
- Emmanuel Onoja
- Department of Science Laboratory Technology, The Federal Polytechnic, P.M.B. 1012, Kaura Namoda, Zamfara State, Nigeria. .,Enzyme Technology and Green Synthesis Group, Faculty of Science, Universiti Teknologi Malaysia, UTM, 81310, Johor Bahru, Malaysia.
| | - Roswanira Abdul Wahab
- Enzyme Technology and Green Synthesis Group, Faculty of Science, Universiti Teknologi Malaysia, UTM, 81310, Johor Bahru, Malaysia. .,Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, UTM, 81310, Johor Bahru, Malaysia.
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15
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Wong WKL, Wahab RA, Onoja E. Chemically modified nanoparticles from oil palm ash silica-coated magnetite as support for Candida rugosa lipase-catalysed hydrolysis: kinetic and thermodynamic studies. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00976-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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16
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Shahabi Nejad M, Seyedi N, Sheibani H, Behzadi S. Synthesis and characterization of Ni(II) complex functionalized silica-based magnetic nanocatalyst and its application in C–N and C–C cross-coupling reactions. Mol Divers 2018; 23:527-539. [DOI: 10.1007/s11030-018-9888-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/23/2018] [Indexed: 10/27/2022]
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17
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Wang X, Zhu X, Shi H, Chen Y, Chen Z, Zeng Y, Tang Z, Duan H. Three-Dimensional-Stacked Gold Nanoparticles with Sub-5 nm Gaps on Vertically Aligned TiO 2 Nanosheets for Surface-Enhanced Raman Scattering Detection Down to 10 fM Scale. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35607-35614. [PMID: 30232887 DOI: 10.1021/acsami.8b11713] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Seeking for ultrasensitive and low-cost substrates is highly demandable for practical applications of surface-enhanced Raman scattering (SERS) technology. In this work, we report an ultrasensitive SERS-active substrate based on wet-chemistry-synthesized vertically aligned large-area TiO2 nanosheets (NSs) decorated by densely packed gold nanoparticles (Au NPs) with sub-5 nm gaps. Via a multistep successive deposition process, three-dimensional-stacked Au NPs sandwiched by a 3 nm SiO2 layer were assembled onto the TiO2 NS, enabling numerous hotspots due to the formation of both ultratiny plasmonic gaps and semiconductor/metal interfaces. Experimental results show that the fabricated substrate displays a detection limit down to 10 fM (10-14 M) without involving any condensation process by using the crystal violet as probe molecules. Control experiments and electromagnetic simulations indicate that the nanogaps defined by the 3 nm spacer are essential for the obtained excellent SERS performance. With its ultrasensitive detection capability, we demonstrate that the fabricated SERS substrate can be used for the trace analysis of melamine in milk.
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Affiliation(s)
| | - Xupeng Zhu
- School of Physics Science and Technology , Lingnan Normal University , Zhanjiang 524048 , People's Republic of China
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18
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Magnetic nanoparticles modified with organic dendrimers containing methyl methacrylate and ethylene diamine for the microextraction of rosuvastatin. Mikrochim Acta 2018; 185:440. [DOI: 10.1007/s00604-018-2956-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 08/09/2018] [Indexed: 10/28/2022]
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19
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Ansari L, Jaafari MR, Bastami TR, Malaekeh-Nikouei B. Improved anticancer efficacy of epirubicin by magnetic mesoporous silica nanoparticles: in vitro and in vivo studies. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2018; 46:594-606. [PMID: 29688064 DOI: 10.1080/21691401.2018.1464461] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The development of magnetic nanoparticles as delivery carriers to magnetically accumulate anticancer drug in cancer tissue has attracted immense interest. In the present study, magnetic mesoporous silica nanoparticles (MMSNs) with magnetite core and silica shell were synthesized. The obtained MMSNs were characterized by DLS, XRD, FT-IR, TEM and VSM in order to investigate the nanoparticle characteristics. With the focus on in vivo validation of such magnetic drug delivery systems, we selected epirubicin (EPI) as the drug. The anticancer properties of EPI-loaded MMSNs were evaluated in a C-26 colon carcinoma model. Alongside monitoring of drug in the tissues with animal imaging system, the tissue distribution was also determined quantitavely. The average size of MMSNs determined with TEM images was about 18.68 ± 2.31 nm. The cellular uptake test indicated that geometric mean fluorescence intensity (MFI) of cells treated with MMSN + EPI in presence of external magnetic field was increasing 27% compared with free EPI. In addition, treatment with drug-loaded MMSNs with the aid of external magnetic gradient had significantly higher inhibition efficacy towards tumor growth than the free EPI treated mice. The targeted drug delivery through external magnet-attraction using EPI-loaded MMSNs resulted in high tumor cell uptake, which leads to elimination of cancer cells effectively.
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Affiliation(s)
- Legha Ansari
- a Nanotechnology Research Center , Institute of Pharmaceutical Technology, Mashhad University of Medical Sciences , Mashhad , Iran
| | - Mahmoud Reza Jaafari
- b Biotechnology Research Center , Institute of Pharmaceutical Technology, Mashhad University of Medical Sciences , Mashhad , Iran
| | - Tahereh Rohani Bastami
- c Department of Chemical Engineering, Faculty of Engineering , Quchan University of Advanced Technology , Quchan , Iran
| | - Bizhan Malaekeh-Nikouei
- a Nanotechnology Research Center , Institute of Pharmaceutical Technology, Mashhad University of Medical Sciences , Mashhad , Iran
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20
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Abbas M, RamuluTorati S, Kim C. Multifunctional Fe3O4/Au core/satellite nanocubes: an efficient chemical synthesis, characterization and functionalization of streptavidin protein. Dalton Trans 2017; 46:2303-2309. [DOI: 10.1039/c6dt04486g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A novel and efficient chemical approach for the synthesis of Fe3O4/Au core/satellite nanocubes is reported.
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Affiliation(s)
- Mohamed Abbas
- Department of Emerging Materials Science
- DGIST
- Daegu 42988
- South Korea
- Ceramics Department
| | - Sri RamuluTorati
- Department of Emerging Materials Science
- DGIST
- Daegu 42988
- South Korea
| | - CheolGi Kim
- Department of Emerging Materials Science
- DGIST
- Daegu 42988
- South Korea
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21
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Wei C, Zong Y, Guo Q, Xu M, Yuan Y, Yao J. Magnetic separation of clenbuterol based on competitive immunoassay and evaluation by surface-enhanced Raman spectroscopy. RSC Adv 2017. [DOI: 10.1039/c6ra24755e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The elimination of β-agonist has attracted considerable interest due to its harmfulness to human health when it existed in pork.
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Affiliation(s)
- Chao Wei
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Yi Zong
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Qinghua Guo
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Minmin Xu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Yaxian Yuan
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Jianlin Yao
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
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22
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Abbas M, RamuluTorati S, Iqbal SA, Kim C. A novel and rapid approach for the synthesis of biocompatible and highly stable Fe3O4/SiO2 and Fe3O4/C core/shell nanocubes and nanorods. NEW J CHEM 2017. [DOI: 10.1039/c6nj03697j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Core/shell nanostructures of MNPs/inorganic materials have attracted enormous research interest due to their promising applications in bio-medicine, energy, electronics, the environment, etc.
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Affiliation(s)
- Mohamed Abbas
- Department of Emerging Materials Science
- DGIST
- Daegu
- South Korea
- Ceramics Department
| | | | - Shawl Asif Iqbal
- Catholic Institute for Visual Science
- Seoul St. Mary's Hospital
- The Catholic University of Korea
- Seoul
- South Korea
| | - CheolGi Kim
- Department of Emerging Materials Science
- DGIST
- Daegu
- South Korea
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24
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Abbas M, Torati SR, Kim C. A novel approach for the synthesis of ultrathin silica-coated iron oxide nanocubes decorated with silver nanodots (Fe3O4/SiO2/Ag) and their superior catalytic reduction of 4-nitroaniline. NANOSCALE 2015; 7:12192-204. [PMID: 26132976 DOI: 10.1039/c5nr02680f] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A novel sonochemical approach was developed for the synthesis of different core/shell structures of Fe3O4/SiO2/Ag nanocubes and SiO2/Ag nanospheres. The total reaction time of the three sonochemical steps for the synthesis of Fe3O4/SiO2/Ag nanocubes is shorter than that of the previously reported methods. A proposed reaction mechanism for the sonochemical functionalization of the silica and the silver on the surface of magnetic nanocubes was discussed in detail. Transmission electron microscopy revealed that the surface of Fe3O4/SiO2 nanocubes was decorated with small Ag nanoparticles of approximately 10-20 nm in size, and the energy dispersive spectroscopy mapping analysis confirmed the morphology of the structure. Additionally, X-ray diffraction data were used to confirm the formation of both phases of a cubic inverse spinel structure for Fe3O4 and bcc structures for Ag in the core/shell structure of the Fe3O4/SiO2/Ag nanocubes. The as-synthesized Fe3O4/SiO2/Ag nanocubes showed a high efficiency in the catalytic reduction reaction of 4-nitroaniline to 4-phenylenediamine and a better performance than both Ag and SiO2/Ag nanoparticles. The grafted silver catalyst was recycled and reused at least fifteen times without a significant loss of catalytic efficiency.
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Affiliation(s)
- Mohamed Abbas
- Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 711-873 Daegu, South Korea.
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25
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Mandel K, Straßer M, Granath T, Dembski S, Sextl G. Surfactant free superparamagnetic iron oxide nanoparticles for stable ferrofluids in physiological solutions. Chem Commun (Camb) 2015; 51:2863-6. [DOI: 10.1039/c4cc09277e] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ferrofluids of superparamagnetic Fe3O4 nanoparticles with “patchy” silica shell are stable over a wide pH range and in physiological solutions.
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Affiliation(s)
- K. Mandel
- Fraunhofer Institute for Silicate Research ISC
- 97082 Wuerzburg
- Germany
| | - M. Straßer
- Fraunhofer Institute for Silicate Research ISC
- 97082 Wuerzburg
- Germany
- Department of Chemical Technology of Materials Synthesis
- University of Wuerzburg
| | - T. Granath
- Department Biology/Chemistry
- University of Bremen
- 28359 Bremen
- Germany
| | - S. Dembski
- Fraunhofer Institute for Silicate Research ISC
- 97082 Wuerzburg
- Germany
| | - G. Sextl
- Fraunhofer Institute for Silicate Research ISC
- 97082 Wuerzburg
- Germany
- Department of Chemical Technology of Materials Synthesis
- University of Wuerzburg
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