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van de Putte M, Polishchuk D, Gauquelin N, Verbeeck J, Koster G, Huijben M. Control of Magnetic Shape Anisotropy by Nanopillar Dimensionality in Vertically Aligned Nanocomposites. ACS APPLIED ELECTRONIC MATERIALS 2024; 6:3695-3703. [PMID: 38828030 PMCID: PMC11137806 DOI: 10.1021/acsaelm.4c00371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/12/2024] [Accepted: 04/14/2024] [Indexed: 06/05/2024]
Abstract
Perpendicular magnetic anisotropy forms the foundation of the current data storage technology. However, there is an ever-increasing demand for higher density data storage, faster read-write access times, and lower power consuming storage devices, which requires new materials to reduce the switching current, improve bit-to-bit distributions, and improve reliability of writing with scalability below 10 nm. Here, vertically aligned nanocomposites (VANs) composed of self-assembled ferromagnetic La0.7Sr0.3MnO3 (LSMO) nanopillars in a surrounding ZnO matrix are investigated for controllable magnetic anisotropy. Confinement of LSMO into nanopillar dimensions down to 15 nm in such VAN films aligns the magnetic easy axis along the out-of-plane (i.e., perpendicular) direction, in strong contrast to the typical in-plane easy axis for strained, phase pure LSMO thin films. The dominant contribution to the magnetic anisotropy in these (LSMO)0.1(ZnO)0.9 VAN films comes from the shape of the nanopillars, while the epitaxial strain at the vertical LSMO:ZnO interfaces exhibits a negligible effect. These VAN films with their large, out-of-plane remnant magnetization of 2.6 μB/Mn and bit density of 0.77 Tbits/inch2 offer an interesting strategy for enhanced data storage applications.
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Affiliation(s)
- Marijn
W. van de Putte
- MESA+
Institute for Nanotechnology, University
of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
| | - Dmytro Polishchuk
- MESA+
Institute for Nanotechnology, University
of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
- Institute
of Magnetism of the National Academy of Sciences of Ukraine and Ministry
of Education and Science of Ukraine, 03142 Kyiv, Ukraine
| | - Nicolas Gauquelin
- Electron
Microscopy for Materials Science (EMAT), Uweniversity of Antwerp, 2020 Antwerp, Belgium
| | - Johan Verbeeck
- Electron
Microscopy for Materials Science (EMAT), Uweniversity of Antwerp, 2020 Antwerp, Belgium
| | - Gertjan Koster
- MESA+
Institute for Nanotechnology, University
of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
| | - Mark Huijben
- MESA+
Institute for Nanotechnology, University
of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
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2
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Mahendravada S, Lahiri BB, Khan F, Sathyanarayana AT, Vizhi RE, Moorthy A, Philip J. A nudge over the relaxation plateau: effect of pH, particle concentration, and medium viscosity on the AC induction heating efficiency of biocompatible chitosan-coated Fe 3O 4nanoparticles. NANOTECHNOLOGY 2024; 35:165704. [PMID: 38211331 DOI: 10.1088/1361-6528/ad1d79] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 01/11/2024] [Indexed: 01/13/2024]
Abstract
The effects of pH, MNP concentration, and medium viscosity on the magnetic fluid hyperthermia (MFH) properties of chitosan-coated superparamagnetic Fe3O4nanoparticles (MNPs) are probed here. Due to the protonation of the amide groups, the MNPs are colloidally stable at lower pH (∼2), but form aggregates at higher pH (∼8). The increased aggregate size at higher pH causes the Brownian relaxation time (τB) to increase, leading to a decrease in specific absorption rate (SAR). For colloidal conditions ensuring Brownian-dominated relaxation dynamics, an increase in MNP concentrations or medium viscosity is found to increase theτB. SAR decreases with increasing MNP concentration, whereas it exhibits a non-monotonic variation with increasing medium viscosity. Dynamic hysteresis loop-based calculations are found to be in agreement with the experimental results. The findings provide a greater understanding of the variation of SAR with the colloidal properties and show the importance of relaxation dynamics on MFH efficiency, where variations in the frequency-relaxation time product across the relaxation plateau cause significant variations in SAR. Further, thein vitrocytotoxicity studies show good bio-compatibility of the chitosan-coated Fe3O4MNPs. Higher SAR at acidic pH for bio-medically acceptable field parameters makes the bio-compatible chitosan-coated Fe3O4MNPs suitable for MFH applications.
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Affiliation(s)
- Srujana Mahendravada
- Smart Materials Section, Materials Characterization Group (MCG), Metallurgy and Materials Group (MMG), Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, Tamil Nadu, PIN 603102, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, PIN 400094, India
| | - B B Lahiri
- Smart Materials Section, Materials Characterization Group (MCG), Metallurgy and Materials Group (MMG), Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, Tamil Nadu, PIN 603102, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, PIN 400094, India
| | - Fouzia Khan
- Smart Materials Section, Materials Characterization Group (MCG), Metallurgy and Materials Group (MMG), Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, Tamil Nadu, PIN 603102, India
| | - A T Sathyanarayana
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, PIN 400094, India
- Low Temperature Studies Section, Condensed Matter Physics Division, Materials Science Group, IGCAR, Tamil Nadu, PIN 603102, India
| | - R Ezhil Vizhi
- Materials Research Laboratory, Centre for Functional Materials, Vellore Institute of Technology, Vellore, Tamil Nadu, PIN 632014, India
| | - Anbalagan Moorthy
- Department of Integrative Biology, School of Bio-Sciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, PIN 632014, India
| | - John Philip
- Smart Materials Section, Materials Characterization Group (MCG), Metallurgy and Materials Group (MMG), Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, Tamil Nadu, PIN 603102, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, PIN 400094, India
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3
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Kandasamy G, Maity D. Inorganic nanocarriers for siRNA delivery for cancer treatments. Biomed Mater 2024; 19:022001. [PMID: 38181441 DOI: 10.1088/1748-605x/ad1baf] [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: 08/29/2023] [Accepted: 01/05/2024] [Indexed: 01/07/2024]
Abstract
RNA interference is one of the emerging methodologies utilized in the treatment of a wide variety of diseases including cancer. This method specifically uses therapeutic RNAs (TpRNAs) like small interfering RNAs (siRNAs) to regulate/silence the cancer-linked genes, thereby minimizing the distinct activities of the cancer cells while aiding in their apoptosis. But, many complications arise during the transport/delivery of these TpRNAs that include poor systemic circulation, instability/degradation inside the body environment, no targeting capacity and also low cellular internalization. These difficulties can be overcome by using nanocarriers to deliver the TpRNAs inside the cancer cells. The following are the various categories of nanocarriers-viral vectors (e.g. lentivirus and adenovirus) and non-viral nanocarriers (self-assembling nanocarriers and inorganic nanocarriers). Viral vectors suffer from disadvantages like high immunogenicity compared to the non-viral nanocarriers. Among non-viral nanocarriers, inorganic nanocarriers gained significant attention as their inherent properties (like magnetic properties) can aid in the effective cellular delivery of the TpRNAs. Most of the prior reports have discussed about the delivery of TpRNAs through self-assembling nanocarriers; however very few have reviewed about their delivery using the inorganic nanoparticles. Therefore, in this review, we have mainly focussed on the delivery of TpRNAs-i.e. siRNA, especially programmed death ligand-1 (PD-L1), survivin, B-cell lymphoma-2 (Bcl-2), vascular endothelial growth factor and other siRNAs using the inorganic nanoparticles-mainly magnetic, metal and silica nanoparticles. Moreover, we have also discussed about the combined delivery of these TpRNAs along with chemotherapeutic drugs (mainly doxorubicin) andin vitroandin vivotherapeutic effectiveness.
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Affiliation(s)
- Ganeshlenin Kandasamy
- Department of Biomedical Engineering, School of Electrical and Communication, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Avadi, Chennai, India
| | - Dipak Maity
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX 77843, United States of America
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Naderi N, Lalebeigi F, Sadat Z, Eivazzadeh-Keihan R, Maleki A, Mahdavi M. Recent advances on hyperthermia therapy applications of carbon-based nanocomposites. Colloids Surf B Biointerfaces 2023; 228:113430. [PMID: 37418814 DOI: 10.1016/j.colsurfb.2023.113430] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 06/10/2023] [Accepted: 06/25/2023] [Indexed: 07/09/2023]
Abstract
Generally, hyperthermia is referred to the composites capability to increase local temperature in such a way that the generated heat would lead to cancerous or bacteria cells destruction, with minimum damage to normal tissue cells. Many different materials have been utilized for hyperthermia application via different heat generating methods. Carbon-based nanomaterials consisting of graphene oxide (GO), carbon nanotube (CNT), carbon dot (CD) and carbon quantum dot (CQD), nanodiamond (ND), fullerene and carbon fiber (CF), have been studied significantly for different applications including hyperthermia due to their biocompatibility, biodegradability, chemical and physical stability, thermal and electrical conductivity and in some cases photothermal conversion. Therefore, in this comprehensive review, a structure-based view on carbon nanomaterials application in hyperthermia therapy of cancer and bacteria via various methods such as optical, magnetic, ultrasonic and radiofrequency-induced hyperthermia is presented.
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Affiliation(s)
- Nooshin Naderi
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Farnaz Lalebeigi
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Zahra Sadat
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Reza Eivazzadeh-Keihan
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Ali Maleki
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran.
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
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Nucleic acid drug vectors for diagnosis and treatment of brain diseases. Signal Transduct Target Ther 2023; 8:39. [PMID: 36650130 PMCID: PMC9844208 DOI: 10.1038/s41392-022-01298-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 12/08/2022] [Accepted: 12/21/2022] [Indexed: 01/18/2023] Open
Abstract
Nucleic acid drugs have the advantages of rich target selection, simple in design, good and enduring effect. They have been demonstrated to have irreplaceable superiority in brain disease treatment, while vectors are a decisive factor in therapeutic efficacy. Strict physiological barriers, such as degradation and clearance in circulation, blood-brain barrier, cellular uptake, endosome/lysosome barriers, release, obstruct the delivery of nucleic acid drugs to the brain by the vectors. Nucleic acid drugs against a single target are inefficient in treating brain diseases of complex pathogenesis. Differences between individual patients lead to severe uncertainties in brain disease treatment with nucleic acid drugs. In this Review, we briefly summarize the classification of nucleic acid drugs. Next, we discuss physiological barriers during drug delivery and universal coping strategies and introduce the application methods of these universal strategies to nucleic acid drug vectors. Subsequently, we explore nucleic acid drug-based multidrug regimens for the combination treatment of brain diseases and the construction of the corresponding vectors. In the following, we address the feasibility of patient stratification and personalized therapy through diagnostic information from medical imaging and the manner of introducing contrast agents into vectors. Finally, we take a perspective on the future feasibility and remaining challenges of vector-based integrated diagnosis and gene therapy for brain diseases.
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Kandasamy G, Maity D. Current Advancements in Self-assembling Nanocarriers-Based siRNA Delivery for Cancer Therapy. Colloids Surf B Biointerfaces 2022; 221:113002. [PMID: 36370645 DOI: 10.1016/j.colsurfb.2022.113002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/01/2022] [Accepted: 10/30/2022] [Indexed: 11/07/2022]
Abstract
Different therapeutic practices for treating cancers have significantly evolved to compensate and/or overcome the failures in conventional methodologies. The demonstrated potentiality in completely inhibiting the tumors and in preventing cancer relapse has made nucleic acids therapy (NAT)/gene therapy as an attractive practice. This has been made possible because NAT-based cancer treatments are highly focused on the fundamental mechanisms - i.e., silencing the expression of oncogenic genes responsible for producing abnormal proteins (via messenger RNAs (mRNAs)). However, the future clinical translation of NAT is majorly dependent upon the effective delivery of the exogenous nucleic acids (especially RNAs - e.g., short interfering RNAs (siRNAs) - herein called biological drugs). Moreover, nano-based vehicles (i.e., nanocarriers) are involved in delivering them to prevent degradation and undesired bioaccumulation while enhancing the stability of siRNAs. Herein, we have initially discussed about three major types of self-assembling nanocarriers (liposomes, polymeric nanoparticles and exosomes). Later, we have majorly reviewed recent developments in non-targeted/targeted nanocarriers for delivery of biological drugs (individual/dual) to silence the most important genes/mRNAs accountable for inducing protein abnormality. These proteins include polo-like kinase 1 (PLK1), survivin, vascular endothelial growth factor (VEGF), B-cell lymphoma/leukaemia-2 (Bcl-2) and multi-drug resistance (MDR). Besides, the consequent therapeutic effects on cancer growth, invasion and/or metastasis have also been discussed. Finally, we have comprehensively reviewed the improvements achieved in the cutting-edge cancer therapeutics while delivering siRNAs in combination with clinically approved chemotherapeutic drugs.
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Sensing performances of spinel ferrites MFe2O4 (M = Mg, Ni, Co, Mn, Cu and Zn) based electrochemical sensors: A review. Anal Chim Acta 2022; 1233:340362. [DOI: 10.1016/j.aca.2022.340362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 09/02/2022] [Accepted: 09/03/2022] [Indexed: 11/19/2022]
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8
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Das B, Batley JT, Krycka KL, Borchers JA, Quarterman P, Korostynski C, Nguyen M, Kamboj I, Aydil ES, Leighton C. Chemically Induced Magnetic Dead Shells in Superparamagnetic Ni Nanoparticles Deduced from Polarized Small-Angle Neutron Scattering. ACS APPLIED MATERIALS & INTERFACES 2022; 14:33491-33504. [PMID: 35848081 DOI: 10.1021/acsami.2c05558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Advances in the synthesis and characterization of colloidal magnetic nanoparticles (NPs) have yielded great gains in the understanding of their complex magnetic behavior, with implications for numerous applications. Recent work using Ni NPs as a model soft ferromagnetic system, for example, achieved quantitative understanding of the superparamagnetic blocking temperature-particle diameter relationship. This hinged, however, on the critical assumption of a ferromagnetic NP volume lower than the chemical volume due to a non-ferromagnetic dead shell indirectly deduced from magnetometry. Here, we determine both the chemical and magnetic average internal structures of Ni NP ensembles via unpolarized, half-polarized, and fully polarized small-angle neutron scattering (SANS) measurements and analyses coupled with X-ray diffraction and magnetometry. The postulated nanometric magnetic dead shell is not only detected but conclusively identified as a non-ferromagnetic Ni phosphide derived from the trioctylphosphine commonly used in hot-injection colloidal NP syntheses. The phosphide shell thickness is tunable via synthesis temperature, falling to as little as 0.5 nm at 170 °C. Temperature- and magnetic field-dependent polarized SANS measurements additionally reveal essentially bulk-like ferromagnetism in the Ni core and negligible interparticle magnetic interactions, quantitatively supporting prior modeling of superparamagnetism. These findings advance the understanding of synthesis-structure-property relationships in metallic magnetic NPs, point to a simple potential route to ligand-free stabilization, and highlight the power of the currently available suite of polarized SANS measurement and analysis capabilities for magnetic NP science and technology.
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Affiliation(s)
- Bhaskar Das
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Joseph T Batley
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Kathryn L Krycka
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Julie A Borchers
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Patrick Quarterman
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Caroline Korostynski
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - My Nguyen
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Ishita Kamboj
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Eray S Aydil
- Department of Chemical and Biomolecular Engineering, New York University Tandon School of Engineering, Brooklyn, New York 11201, United States
| | - Chris Leighton
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
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9
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Smart Bone Graft Composite for Cancer Therapy Using Magnetic Hyperthermia. MATERIALS 2022; 15:ma15093187. [PMID: 35591525 PMCID: PMC9104543 DOI: 10.3390/ma15093187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/10/2022] [Accepted: 04/11/2022] [Indexed: 02/06/2023]
Abstract
Magnetic hyperthermia (MHT) is a therapy that uses the heat generated by a magnetic material for cancer treatment. Magnetite nanoparticles are the most used materials in MHT. However, magnetite has a high Curie temperature (Tc~580 °C), and its use may generate local superheating. To overcome this problem, strontium-doped lanthanum manganite could replace magnetite because it shows a Tc near the ideal range (42–45 °C). In this study, we developed a smart composite formed by an F18 bioactive glass matrix with different amounts of Lanthanum-Strontium Manganite (LSM) powder (5, 10, 20, and 30 wt.% LSM). The effect of LSM addition was analyzed in terms of sinterability, magnetic properties, heating ability under a magnetic field, and in vitro bioactivity. The saturation magnetization (Ms) and remanent magnetization (Mr) increased by the LSM content, the confinement of LSM particles within the bioactive glass matrix also caused an increase in Tc. Calorimetry evaluation revealed a temperature increase from 5 °C (composition LSM5) to 15 °C (LSM30). The specific absorption rates were also calculated. Bioactivity measurements demonstrated HCA formation on the surface of all the composites in up to 15 days. The best material reached 40 °C, demonstrating the proof of concept sought in this research. Therefore, these composites have great potential for bone cancer therapy and should be further explored.
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Core–Shell Nanoarchitectonics of CoFe2O4 Encapsulated La2Fe2O6 Nanoparticles for Their Use in Various Applications. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-021-02202-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Gaumet AV, Caddeo F, Loche D, Corrias A, Casula MF, Falqui A, Casu A. Magnetic Study of CuFe 2O 4-SiO 2 Aerogel and Xerogel Nanocomposites. NANOMATERIALS 2021; 11:nano11102680. [PMID: 34685121 PMCID: PMC8538101 DOI: 10.3390/nano11102680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/28/2021] [Accepted: 10/04/2021] [Indexed: 11/16/2022]
Abstract
CuFe2O4 is an example of ferrites whose physico-chemical properties can vary greatly at the nanoscale. Here, sol-gel techniques are used to produce CuFe2O4-SiO2 nanocomposites where copper ferrite nanocrystals are grown within a porous dielectric silica matrix. Nanocomposites in the form of both xerogels and aerogels with variable loadings of copper ferrite (5 wt%, 10 wt% and 15 wt%) were synthesized. Transmission electron microscopy and X-ray diffraction investigations showed the occurrence of CuFe2O4 nanoparticles with average crystal size ranging from a few nanometers up to around 9 nm, homogeneously distributed within the porous silica matrix, after thermal treatment of the samples at 900 °C. Evidence of some impurities of CuO and α-Fe2O3 was found in the aerogel samples with 10 wt% and 15 wt% loading. DC magnetometry was used to investigate the magnetic properties of these nanocomposites, as a function of the loading of copper ferrite and of the porosity characteristics. All the nanocomposites show a blocking temperature lower than RT and soft magnetic features at low temperature. The observed magnetic parameters are interpreted taking into account the occurrence of size and interaction effects in an ensemble of superparamagnetic nanoparticles distributed in a matrix. These results highlight how aerogel and xerogel matrices give rise to nanocomposites with different magnetic features and how the spatial distribution of the nanophase in the matrices modifies the final magnetic properties with respect to the case of conventional unsupported nanoparticles.
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Affiliation(s)
- Alizé V. Gaumet
- School of Physical Sciences, Ingram Building, University of Kent, Canterbury CT2 7NH, UK; (A.V.G.); (F.C.); (D.L.); (A.C.)
| | - Francesco Caddeo
- School of Physical Sciences, Ingram Building, University of Kent, Canterbury CT2 7NH, UK; (A.V.G.); (F.C.); (D.L.); (A.C.)
| | - Danilo Loche
- School of Physical Sciences, Ingram Building, University of Kent, Canterbury CT2 7NH, UK; (A.V.G.); (F.C.); (D.L.); (A.C.)
| | - Anna Corrias
- School of Physical Sciences, Ingram Building, University of Kent, Canterbury CT2 7NH, UK; (A.V.G.); (F.C.); (D.L.); (A.C.)
| | - Maria F. Casula
- Department of Mechanical, Chemical and Materials Engineering and INSTM, University of Cagliari, Via Marengo 2, 09123 Cagliari, Italy;
| | - Andrea Falqui
- Department of Physics “Aldo Pontremoli”, University of Milan, Via Celoria 16, 20133 Milan, Italy;
| | - Alberto Casu
- Biological and Environmental Sciences and Engineering (BESE) Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- Correspondence:
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Gschwend PM, Hintze JM, Herrmann IK, Pratsinis SE, Starsich FHL. Precision in Thermal Therapy: Clinical Requirements and Solutions from Nanotechnology. ADVANCED THERAPEUTICS 2021. [DOI: 10.1002/adtp.202000193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Pascal M. Gschwend
- Particle Technology Laboratory Department of Mechanical and Process Engineering ETH Zurich Sonneggstrasse 3 Zurich CH‐8092 Switzerland
| | - Justin M. Hintze
- Royal College of Surgeons in Ireland 123 St Stephen's Green, Saint Peter's Dublin 2 D02 YN77 Ireland
| | - Inge K. Herrmann
- Particles‐Biology Interactions Department Materials Meet Life Swiss Federal Laboratories for Materials Science and Technology (Empa) Lerchenfeldstrasse 5 St. Gallen CH‐9014 Switzerland
- Nanoparticle Systems Engineering Laboratory Department of Mechanical and Process Engineering ETH Zurich Sonneggstrasse 3 Zurich CH‐8092 Switzerland
| | - Sotiris E. Pratsinis
- Particle Technology Laboratory Department of Mechanical and Process Engineering ETH Zurich Sonneggstrasse 3 Zurich CH‐8092 Switzerland
| | - Fabian H. L. Starsich
- Particles‐Biology Interactions Department Materials Meet Life Swiss Federal Laboratories for Materials Science and Technology (Empa) Lerchenfeldstrasse 5 St. Gallen CH‐9014 Switzerland
- Nanoparticle Systems Engineering Laboratory Department of Mechanical and Process Engineering ETH Zurich Sonneggstrasse 3 Zurich CH‐8092 Switzerland
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Peters JA. Relaxivity of manganese ferrite nanoparticles. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2020; 120-121:72-94. [PMID: 33198969 DOI: 10.1016/j.pnmrs.2020.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 07/25/2020] [Accepted: 07/26/2020] [Indexed: 05/27/2023]
Abstract
Manganese ferrite nanoparticles are superparamagnetic and have very high saturation magnetization, which makes them candidates for application as MRI contrast agents. Because these nanoparticles are very effective enhancers of transverse relaxation, they are particularly suitable as negative (T2-weighted) contrast agents. The magnitude of the relaxivity of nanoparticulate Mn ferrites seems to be determined mainly by the method of preparation, their dimensions, and their saturation magnetization.
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Affiliation(s)
- Joop A Peters
- Biocatalysis, Department of Biotechnology, Van der Maasweg 9, 2629 HZ Delft, the Netherlands.
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Wei Z, Pashchenko AV, Liedienov NA, Zatovsky IV, Butenko DS, Li Q, Fesych IV, Turchenko VA, Zubov EE, Polynchuk PY, Pogrebnyak VG, Poroshin VM, Levchenko GG. Multifunctionality of lanthanum-strontium manganite nanopowder. Phys Chem Chem Phys 2020; 22:11817-11828. [PMID: 32412020 DOI: 10.1039/d0cp01426e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Manganites are multifunctional materials which are widely used in both technology and devices. In this article, new prospects of their use as nanoparticles for various types of applications are demonstrated. For that, the ferromagnetic nanopowder of La0.6Sr0.4MnO3 has been synthesized by the sol-gel method with a subsequent annealing at 700-900 °C. The crystal structure, phase composition and morphology of nanoparticles as well as magnetic, magnetothermal and electrocatalytic properties have been studied comprehensively. The critical sizes of superparamagnetic, single-domain, and multi-domain states have been determined. It has been established that an anomalously wide temperature range of magnetocaloric properties is associated with an additional contribution to the magnetocaloric effect from superparamagnetic nanoparticles. The maximum values of the specific loss power are observed in the relaxation hysteresis region near the magnetic phase transition temperature. The electrochemical stability and features of the decomposition of nanoparticles in 1 M KOH and Na2SO4 electrolytes have been determined. A decrease in the particle size contributes to an increase in electrocatalytic activity for overall water splitting. Magnetocaloric and electrocatalytic results of the work indicate the prospects for obtaining the possibility of changing the temperature regime of electrocatalysis using contactless heating or cooling.
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Affiliation(s)
- Ziyu Wei
- State Key Laboratory of Superhard Materials, International Center of Future Science, Jilin University, 130012 Changchun, China.
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