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Chowdhury M, Esteban DA, Amin R, Román-Freijeiro C, Rösch EL, Etzkorn M, Schilling M, Ludwig F, Bals S, Salgueiriño V, Lak A. Organic Molecular Glues to Design Three-Dimensional Cubic Nano-assemblies of Magnetic Nanoparticles. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2024; 36:6865-6876. [PMID: 39070672 PMCID: PMC11270742 DOI: 10.1021/acs.chemmater.4c00770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 06/18/2024] [Accepted: 06/21/2024] [Indexed: 07/30/2024]
Abstract
Self-assembled magnetic nanoparticles offer next-generation materials that allow harnessing of their physicochemical properties for many applications. However, how three-dimensional nanoassemblies of magnetic nanoparticles can be synthesized in one-pot synthesis without excessive postsynthesis processes is still a bottleneck. Here, we propose a panel of small organic molecules that glue nanoparticle crystallites during the growth of particles to form large nanoassembled nanoparticles (NANs). We find that both carbonyl and carboxyl functional groups, presenting in benzaldehyde and benzoic acid, respectively, are needed to anchor with metal ions, while aromatic rings are needed to create NANs through π-π stacking. When benzyl alcohol, lacking carbonyl and carboxyl groups, is employed, no NANs are formed. NANs formed by benzoic acid reveal a unique combination of high magnetization and coercivity, whereas NANs formed by benzaldehyde show the largest exchange bias reported in nanoparticles. Surprisingly, our NANs show unconventional colloidal stability due to their unique nanoporous architectures.
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Affiliation(s)
- Mohammad
Suman Chowdhury
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | | | - Rabia Amin
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | | | - Enja Laureen Rösch
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | - Markus Etzkorn
- Institute
of Applied Physics, TU Braunschweig, Mendelssohnstraße 2, Braunschweig 38106, Germany
| | - Meinhard Schilling
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | - Frank Ludwig
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | - Sara Bals
- EMAT,
University of Antwerp, Groenenborgerlaan 171, Antwerp B-2020, Belgium
| | - Verónica Salgueiriño
- CINBIO,
Universidade de Vigo, Vigo 36310, Spain
- Departamento
de Física Aplicada, Universidade
de Vigo, Vigo 36310, Spain
| | - Aidin Lak
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
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2
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Pasinetti PM, Pena-Ausar JE, Pinto OA. Adsorption on nanoparticles with surface defects: mean field and energy level approaches. Phys Chem Chem Phys 2024; 26:11815-11824. [PMID: 38566611 DOI: 10.1039/d3cp05909j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
In this work two theoretical approximations, the so-called theoretical approach of energy levels and an extension of the modified mean field approach (TAEL and MMFA, respectively) are applied to the study of surface decoration of modified nanostructures like crystalline nanoparticles. The surface of the nanoparticles is modified by the irreversible random deposition of defects consisting in isolated atoms. Such deposition is carried out until a certain surface density is reached, leaving the rest of the sites available for a second species to adsorb. Through the formulation of the integral equation, the theoretical approaches permit obtaining the adsorption isotherms and the compressibility of the adlayer. The main difference between the two approaches is the degree of details considered in their mathematical formulations: TAEL takes in account all the energy levels meanwhile MMFA only an average. The degree of precision and usefulness of both theories were evaluated in comparison with Monte Carlo simulations in the grand canonical assembly. Several cases were studied: attractive and repulsive lateral interactions and different fraction of defects. The effects of the nanoscale were considered for different types and sizes of nanoparticles. By calculating an integral error, we are able to affirm that TAEL reproduces all the properties of the analyzed quantities from the reference simulated curves. On the other hand, the MMFA performance is good only for a certain limited range of the parameters, however the strength is in the mathematical simplicity compared to TAEL.
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Affiliation(s)
- P M Pasinetti
- Departamento de Física, Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis, CONICET, Ejército de los Andes 950, D5700HHW San Luis, San Luis, Argentina
| | - J E Pena-Ausar
- Instituto de Bionanotecnología del NOA (INBIONATEC-CONICET), Universidad Nacional de Santiago del Estero, RN 9 Km 1125 Villa el Zanjón, Santiago del Estero, G4206XCP, Argentina.
| | - O A Pinto
- Instituto de Bionanotecnología del NOA (INBIONATEC-CONICET), Universidad Nacional de Santiago del Estero, RN 9 Km 1125 Villa el Zanjón, Santiago del Estero, G4206XCP, Argentina.
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3
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Xie X, Zhai J, Zhou X, Guo Z, Lo PC, Zhu G, Chan KWY, Yang M. Magnetic Particle Imaging: From Tracer Design to Biomedical Applications in Vasculature Abnormality. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2306450. [PMID: 37812831 DOI: 10.1002/adma.202306450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/14/2023] [Indexed: 10/11/2023]
Abstract
Magnetic particle imaging (MPI) is an emerging non-invasive tomographic technique based on the response of magnetic nanoparticles (MNPs) to oscillating drive fields at the center of a static magnetic gradient. In contrast to magnetic resonance imaging (MRI), which is driven by uniform magnetic fields and projects the anatomic information of the subjects, MPI directly tracks and quantifies MNPs in vivo without background signals. Moreover, it does not require radioactive tracers and has no limitations on imaging depth. This article first introduces the basic principles of MPI and important features of MNPs for imaging sensitivity, spatial resolution, and targeted biodistribution. The latest research aiming to optimize the performance of MPI tracers is reviewed based on their material composition, physical properties, and surface modifications. While the unique advantages of MPI have led to a series of promising biomedical applications, recent development of MPI in investigating vascular abnormalities in cardiovascular and cerebrovascular systems, and cancer are also discussed. Finally, recent progress and challenges in the clinical translation of MPI are discussed to provide possible directions for future research and development.
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Affiliation(s)
- Xulin Xie
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Jiao Zhai
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Xiaoyu Zhou
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Zhengjun Guo
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
- Department of Oncology, the Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Pui-Chi Lo
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Guangyu Zhu
- Department of Chemistry, City University of Hong Kong, Hong Kong SAR, 999077, China
| | - Kannie W Y Chan
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong SAR, 999077, China
| | - Mengsu Yang
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
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4
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Meng Y, Liu Y, Zhu Y, Qiu C, Ma A, Liu D, Zhang S, Gu L, Zhang J, Wang J. Insights into the time-course cellular effects triggered by iron oxide nanoparticles by combining proteomics with the traditional pharmacology strategy. J Mater Chem B 2024; 12:1892-1904. [PMID: 38305086 DOI: 10.1039/d3tb02476h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
In recent years, a number of initially approved magnetic iron oxide nanoparticle (IONP)-based nano-medicines have been withdrawn due to the obscure nano-bio effects. Therefore, there is an urgent need to study the cellular effects triggered by IONPs on cells. In this study, we investigate the time-course cellular effects on the response of RAW 264.7 cells caused by Si-IONPs via pharmacological and mass spectrometry-based proteomics techniques. Our results revealed that Si-IONPs were internalized by clathrin-mediated endocytosis within 1 hour, and gradually degraded in endolysosomes over time, which might influence autophagy, oxidative stress, innate immune response, and inflammatory response after 12 hours. Our research provides a necessary assessment of Si-IONPs for further clinical treatment.
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Affiliation(s)
- Yuqing Meng
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Yanqing Liu
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Yongping Zhu
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Chong Qiu
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Ang Ma
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Dandan Liu
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Shujie Zhang
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Liwei Gu
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Junzhe Zhang
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Jigang Wang
- State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
- Department of Biological Sciences, National University of Singapore, Singapore 117543, Singapore
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5
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Kantesaria S, Tang X, Suddarth S, Pasek-Allen J, Namsrai BE, Goswitz A, Hintz M, Bischof J, Garwood M. A Low-Cost, Tabletop LOD-EPR System for Nondestructive Quantification of Iron Oxide Nanoparticles in Tissues. ACS Sens 2024; 9:262-271. [PMID: 38190731 DOI: 10.1021/acssensors.3c01898] [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] [Indexed: 01/10/2024]
Abstract
Iron oxide nanoparticles (IONPs) have wide utility in applications from drug delivery to the rewarming of cryopreserved tissues. Due to the complex behavior of IONPs (e.g., uneven particle distribution and aggregation), further developments and clinical translation can be accelerated by having access to a noninvasive method for tissue IONP quantification. Currently, there is no low-cost method to nondestructively track IONPs in tissues across a wide range of concentrations. This work describes the performance of a low-cost, tabletop, longitudinally detected electron paramagnetic resonance (LOD-EPR) system to address this issue in the field of cryopreservation, which utilizes IONPs for rewarming of rat kidneys. A low-cost LOD-EPR system is realized via simultaneous transmit and receive using MHz continuous-wave transverse excitation with kHz modulation, which is longitudinally detected at the modulation frequency to provide both geometric and frequency isolation. The accuracy of LOD-EPR for IONP quantification is compared with NMR relaxometry. Solution measurements show excellent linearity (R2 > 0.99) versus Fe concentration for both measurements on EMG308 (a commercial nanoparticle), silica-coated EMG308, and PEG-coated EMG308 in water. The LOD-EPR signal intensity and NMR longitudinal relaxation rate constant (R1) of water are affected by particle coating, solution viscosity, and particle aggregation. R1 remains linear but with a reduced slope when in cryoprotective agent (CPA) solution, whereas the LOD-EPR signal is relatively insensitive to this. R1 does not correlate well with Fe concentration in rat kidney sections (R2 = 0.3487), while LOD-EPR does (R2 = 0.8276), with a linear regression closely matching that observed in solution and CPA.
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Affiliation(s)
- Saurin Kantesaria
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Xueyan Tang
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Steven Suddarth
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Jacqueline Pasek-Allen
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Bat-Erdene Namsrai
- Department of Surgery, University of Minnesota, 420 Delaware Street SE, Minneapolis, Minnesota 55455, United States
| | - Arjun Goswitz
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. SE, Minneapolis, Minnesota 55455, United States
| | - Mikaela Hintz
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. SE, Minneapolis, Minnesota 55455, United States
| | - John Bischof
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. SE, Minneapolis, Minnesota 55455, United States
| | - Michael Garwood
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, Minnesota 55455, United States
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6
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Muzzi B, Albino M, Petrecca M, Innocenti C, de Julián Fernández C, Bertoni G, Ibarra MR, Christensen M, Avdeev M, Marquina C, Sangregorio C. Defect-Engineering by Solvent Mediated Mild Oxidation as a Tool to Induce Exchange Bias in Metal Doped Ferrites. SMALL METHODS 2023; 7:e2300647. [PMID: 37649220 DOI: 10.1002/smtd.202300647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/22/2023] [Indexed: 09/01/2023]
Abstract
The crystal site occupancy of different divalent ions and the induction of lattice defects represent an additional tool for modifying the intrinsic magnetic properties of spinel ferrites nanoparticles. Here, the relevance of the lattice defects is demonstrated in the appearance of exchange-bias and in the improvement of the magnetic properties of doped ferrites of 20 nm, obtained from the mild oxidation of core@shell (wüstite@ferrite) nanoparticles. Three types of nanoparticles (Fe0.95 O@Fe3 O4 , Co0.3 Fe0.7 O@Co0.8 Fe2.2 O4 and Ni0.17 Co0.21 Fe0.62 O@Ni0.4 Co0.3 Fe2.3 O4 ) are oxidized. As a result, the core@shell morphology is removed and transformed in a spinel-like nanoparticle, through a topotactic transformation. This study shows that most of the induced defects in these nanoparticles and their magnetic properties are driven by the inability of the Co(II) ions at the octahedral sites to migrate to tetrahedral sites, at the chosen mild oxidation temperature. In addition, the appearance of crystal defects and antiphase boundaries improves the magnetic properties of the starting compounds and leads to the appearance of exchange bias at room temperature. These results highlight the validity of the proposed method to impose novel magnetic characteristics in the technologically relevant class of nanomaterials such as spinel ferrites, expanding their potential exploitation in several application fields.
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Affiliation(s)
- Beatrice Muzzi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, I-53100, Italy
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino (FI), I-50019, Italy
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
| | - Martin Albino
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
| | - Michele Petrecca
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
| | - Claudia Innocenti
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino (FI), I-50019, Italy
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
| | - César de Julián Fernández
- Istituto dei Materiali per l' Elettronica ed il Magnetismo (IMEM), Consiglio Nazionale delle Ricerche(CNR), Parma, I-43124, Italy
| | | | - M Ricardo Ibarra
- Instituto de Nanociencia y Materiales de Aragón (INMA), Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Zaragoza, Zaragoza, 50009, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, Zaragoza, 50009, Spain
- Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, Zaragoza, 50009, Spain
| | - Mogens Christensen
- Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus C, DK-8000, Denmark
| | - Maxim Avdeev
- Australian Nuclear Science and Technology Organisation (ANSTO), New Illawarra Road, Lucas Heights, NSW, 2234, Australia
- School of Chemistry, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Clara Marquina
- Instituto de Nanociencia y Materiales de Aragón (INMA), Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Zaragoza, Zaragoza, 50009, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, Zaragoza, 50009, Spain
| | - Claudio Sangregorio
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino (FI), I-50019, Italy
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
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7
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Gerina M, Sanna Angotzi M, Mameli V, Gajdošová V, Rainer DN, Dopita M, Steinke NJ, Aurélio D, Vejpravová J, Zákutná D. Size dependence of the surface spin disorder and surface anisotropy constant in ferrite nanoparticles. NANOSCALE ADVANCES 2023; 5:4563-4570. [PMID: 37638154 PMCID: PMC10448355 DOI: 10.1039/d3na00266g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Accepted: 07/14/2023] [Indexed: 08/29/2023]
Abstract
The magnetic properties of nanoscale magnets are greatly influenced by surface anisotropy. So far, its quantification is based on the examination of the blocking temperature shift within a series of nanoparticles of varying sizes. In this scenario, the surface anisotropy is assumed to be a particle size-independent quantity. However, there is no solid experimental proof to support this simplified picture. On the contrary, our work unravels the size-dependent magnetic morphology and surface anisotropy in highly uniform magnetic nanoparticles using small-angle polarized neutron scattering. We observed that the surface anisotropy constant does not depend on the nanoparticle's size in the range of 3-9 nm. Furthermore, our results demonstrate that the surface spins are less prone to polarization with increasing nanoparticle size. Our study thus proves the size dependence of the surface spin disorder and the surface anisotropy constant in fine nanomagnets. These findings open new routes in materials based on a controlled surface spin disorder, which is essential for future applications of nanomagnets in biomedicine and magnonics.
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Affiliation(s)
- Marianna Gerina
- Department of Inorganic Chemistry, Faculty of Science, Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Marco Sanna Angotzi
- Department of Chemical and Geological Sciences, University of Cagliari S.S. 554 bivio per Sestu, 09042 8 Monserrato CA Italy
| | - Valentina Mameli
- Department of Chemical and Geological Sciences, University of Cagliari S.S. 554 bivio per Sestu, 09042 8 Monserrato CA Italy
| | - Veronika Gajdošová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic 162 06 Prague 6 Czech Republic
| | - Daniel N Rainer
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Milan Dopita
- Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University Ke Karlovu 5, 121 16 Prague 2 Czech Republic
| | | | - David Aurélio
- Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University Ke Karlovu 5, 121 16 Prague 2 Czech Republic
| | - Jana Vejpravová
- Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University Ke Karlovu 5, 121 16 Prague 2 Czech Republic
| | - Dominika Zákutná
- Department of Inorganic Chemistry, Faculty of Science, Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
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8
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Devi A, Dhiman N, Kumar N, Alfalasi W, Kumar A, Ahluwalia PK, Singh A, Tit N. Ferromagnetism in Defected TMD (MoX 2, X = S, Se) Monolayer and Its Sustainability under O 2, O 3, and H 2O Gas Exposure: DFT Study. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13101642. [PMID: 37242058 DOI: 10.3390/nano13101642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/28/2023] [Accepted: 04/30/2023] [Indexed: 05/28/2023]
Abstract
Spin-polarized density-functional theory (DFT) has been employed to study the effects of atmospheric gases on the electronic and magnetic properties of a defective transition-metal dichalcogenide (TMD) monolayer, MoX2 with X = S or Se. This study focuses on three single vacancies: (i) molybdenum "VMo"; (ii) chalcogenide "VX"; and (iii) di-chalcogenide "VX2". Five different samples of sizes ranging from 4 × 4 to 8 × 8 primitive cells (PCs) were considered in order to assess the effect of vacancy-vacancy interaction. The results showed that all defected samples were paramagnetic semiconductors, except in the case of VMo in MoSe2, which yielded a magnetic moment of 3.99 μB that was independent of the sample size. Moreover, the samples of MoSe2 with VMo and sizes of 4 × 4 and 5 × 5 PCs exhibited half-metallicity, where the spin-up state becomes conductive and is predominantly composed of dxy and dz2 orbital mixing attributed to Mo atoms located in the neighborhood of VMo. The requirement for the establishment of half-metallicity is confirmed to be the provision of ferromagnetic-coupling (FMC) interactions between localized magnetic moments (such as VMo). The critical distance for the existence of FMC is estimated to be dc≅ 16 Å, which allows small sample sizes in MoSe2 to exhibit half-metallicity while the FMC represents the ground state. The adsorption of atmospheric gases (H2O, O2, O3) can drastically change the electronic and magnetic properties, for instance, it can demolish the half-metallicity characteristics. Hence, the maintenance of half-metallicity requires keeping the samples isolated from the atmosphere. We benchmarked our theoretical results with the available data in the literature throughout our study. The conditions that govern the appearance/disappearance of half-metallicity are of great relevance for spintronic device applications.
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Affiliation(s)
- Anjna Devi
- Department of Physics, Himachal Pradesh University, Shimla 171005, India
- Department of Physics, Swami Vivekanand Government College, Shimla-Kangra Rd, Ghumarwin 174021, India
| | - Neha Dhiman
- Department of Physics, Swami Vivekanand Government College, Shimla-Kangra Rd, Ghumarwin 174021, India
| | - Narender Kumar
- Department of Physics, Swami Vivekanand Government College, Shimla-Kangra Rd, Ghumarwin 174021, India
- Department of Physics, College of Science, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
- National Water and Energy Center, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
| | - Wadha Alfalasi
- Department of Physics, College of Science, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
- National Water and Energy Center, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
| | - Arun Kumar
- Department of Physics, Swami Vivekanand Government College, Shimla-Kangra Rd, Ghumarwin 174021, India
| | - P K Ahluwalia
- Department of Physics, Himachal Pradesh University, Shimla 171005, India
| | - Amarjeet Singh
- Department of Physics, Himachal Pradesh University, Shimla 171005, India
| | - Nacir Tit
- Department of Physics, College of Science, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
- National Water and Energy Center, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
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9
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Adams MP, Pratami Sinaga E, Michels A. On the angular anisotropy of the randomly averaged magnetic neutron scattering cross section of nanoparticles. IUCRJ 2023; 10:261-269. [PMID: 36913314 PMCID: PMC10161771 DOI: 10.1107/s205225252300180x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 02/27/2023] [Indexed: 05/06/2023]
Abstract
The magnetic small-angle neutron scattering (SANS) cross section of dilute ensembles of uniformly magnetized and randomly oriented Stoner-Wohlfarth particles is calculated using the Landau-Lifshitz equation. The focus of this study is on the angular anisotropy of the magnetic SANS signal as it can be seen on a two-dimensional position-sensitive detector. Depending on the symmetry of the magnetic anisotropy of the particles (e.g. uniaxial, cubic), an anisotropic magnetic SANS pattern may result, even in the remanent state or at the coercive field. The case of inhomogeneously magnetized particles and the effects of a particle-size distribution and interparticle correlations are also discussed.
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Affiliation(s)
- Michael P Adams
- Department of Physics and Materials Science, University of Luxembourg, 162A avenue de la Faiencerie, L-1511 Luxembourg, Grand Duchy of Luxembourg
| | - Evelyn Pratami Sinaga
- Department of Physics and Materials Science, University of Luxembourg, 162A avenue de la Faiencerie, L-1511 Luxembourg, Grand Duchy of Luxembourg
| | - Andreas Michels
- Department of Physics and Materials Science, University of Luxembourg, 162A avenue de la Faiencerie, L-1511 Luxembourg, Grand Duchy of Luxembourg
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10
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Llacer-Wintle J, Renz J, Hertle L, Veciana A, von Arx D, Wu J, Bruna P, Vukomanovic M, Puigmartí-Luis J, Nelson BJ, Chen XZ, Pané S. The magnetopyroelectric effect: heat-mediated magnetoelectricity in magnetic nanoparticle-ferroelectric polymer composites. MATERIALS HORIZONS 2023. [PMID: 37185815 DOI: 10.1039/d2mh01361d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Magnetoelectricity enables a solid-state material to generate electricity under magnetic fields. Most magnetoelectric composites are developed through a strain-mediated route by coupling piezoelectric and magnetostrictive phases. However, the limited availability of high-performance magnetostrictive components has become a constraint for the development of novel magnetoelectric materials. Here, we demonstrate that nanostructured composites of magnetic and pyroelectric materials can generate electrical output, a phenomenon we refer to as the magnetopyroelectric (MPE) effect, which is analogous to the magnetoelectric effect in strain-mediated composite multiferroics. Our composite consists of magnetic iron oxide nanoparticles (IONPs) dispersed in a ferroelectric (and also pyroelectric) poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) matrix. Under a high-frequency low-magnitude alternating magnetic field, the IONPs generate heat through hysteresis loss, which stimulates the depolarization process of the pyroelectric polymer. This magnetopyroelectric approach creates a new opportunity to develop magnetoelectric materials for a wide range of applications.
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Affiliation(s)
- Joaquin Llacer-Wintle
- Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, CH-8092 Zurich, Switzerland.
| | - Jan Renz
- Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, CH-8092 Zurich, Switzerland.
| | - Lukas Hertle
- Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, CH-8092 Zurich, Switzerland.
| | - Andrea Veciana
- Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, CH-8092 Zurich, Switzerland.
| | - Denis von Arx
- Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, CH-8092 Zurich, Switzerland.
| | - Jiang Wu
- Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, CH-8092 Zurich, Switzerland.
| | - Pere Bruna
- Departament de Física, Universitat Politècnica de Catalunya, BarcelonaTech (UPC); Institut de Tècniques Energètiques (INTE); Barcelona Research Center in Multiscale Science and Engineering, Av. Eduard Maristany 16, 08019 Barcelona, Spain
| | - Marija Vukomanovic
- Biomaterials group, Advanced Materials Department, Jožef Stefan Institute, 1000 Ljubljana, Slovenia
| | - Josep Puigmartí-Luis
- Departament de Ciència dels Materials i Química Física, Institut de Química Teòrica i Computacional, 08028 Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
| | - Bradley J Nelson
- Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, CH-8092 Zurich, Switzerland.
| | - Xiang-Zhong Chen
- Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, CH-8092 Zurich, Switzerland.
| | - Salvador Pané
- Multi-Scale Robotics Lab (MSRL), Institute of Robotics and Intelligent Systems (IRIS), ETH Zurich, CH-8092 Zurich, Switzerland.
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11
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Lavorato GC, de Almeida AA, Vericat C, Fonticelli MH. Redox phase transformations in magnetite nanoparticles: impact on their composition, structure and biomedical applications. NANOTECHNOLOGY 2023; 34:192001. [PMID: 36825776 DOI: 10.1088/1361-6528/acb943] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Magnetite nanoparticles (NPs) are one of the most investigated nanomaterials so far and modern synthesis methods currently provide an exceptional control of their size, shape, crystallinity and surface functionalization. These advances have enabled their use in different fields ranging from environmental applications to biomedicine. However, several studies have shown that the precise composition and crystal structure of magnetite NPs depend on their redox phase transformations, which have a profound impact on their physicochemical properties and, ultimately, on their technological applications. Although the physical mechanisms behind such chemical transformations in bulk materials have been known for a long time, experiments on NPs with large surface-to-volume ratios have revealed intriguing results. This article is focused on reviewing the current status of the field. Following an introduction on the fundamental properties of magnetite and other related iron oxides (including maghemite and wüstite), some basic concepts on the chemical routes to prepare iron oxide nanomaterials are presented. The key experimental techniques available to study phase transformations in iron oxides, their advantages and drawbacks to the study of nanomaterials are then discussed. The major section of this work is devoted to the topotactic oxidation of magnetite NPs and, in this regard, the cation diffusion model that accounts for the experimental results on the kinetics of the process is critically examined. Since many synthesis routes rely on the formation of monodisperse magnetite NPs via oxidation of wüstite counterparts, the modulation of their physical properties by crystal defects arising from the oxidation process is also described. Finally, the importance of a precise control of the composition and structure of magnetite-based NPs is discussed and its role in their biomedical applications is highlighted.
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Affiliation(s)
- Gabriel C Lavorato
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 16, Suc. 4, 1900 La Plata, Argentina
| | - Adriele A de Almeida
- Instituto de Física 'Gleb Wataghin' (IFGW), Universidade Estadual de Campinas-UNICAMP, R. Sérgio Buarque de Holanda, 777-CEP: 13083-859, Campinas - SP, Brazil
| | - Carolina Vericat
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 16, Suc. 4, 1900 La Plata, Argentina
| | - Mariano H Fonticelli
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 16, Suc. 4, 1900 La Plata, Argentina
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12
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Nizamov TR, Amirov AA, Kuznetsova TO, Dorofievich IV, Bordyuzhin IG, Zhukov DG, Ivanova AV, Gabashvili AN, Tabachkova NY, Tepanov AA, Shchetinin IV, Abakumov MA, Savchenko AG, Majouga AG. Synthesis and Functional Characterization of Co xFe 3-xO 4-BaTiO 3 Magnetoelectric Nanocomposites for Biomedical Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:811. [PMID: 36903693 PMCID: PMC10004808 DOI: 10.3390/nano13050811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/13/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
Nowadays, magnetoelectric nanomaterials are on their way to finding wide applications in biomedicine for various cancer and neurological disease treatment, which is mainly restricted by their relatively high toxicity and complex synthesis. This study for the first time reports novel magnetoelectric nanocomposites of CoxFe3-xO4-BaTiO3 series with tuned magnetic phase structures, which were synthesized via a two-step chemical approach in polyol media. The magnetic CoxFe3-xO4 phases with x = 0.0, 0.5, and 1.0 were obtained by thermal decomposition in triethylene glycol media. The magnetoelectric nanocomposites were synthesized by the decomposition of barium titanate precursors in the presence of a magnetic phase under solvothermal conditions and subsequent annealing at 700 °C. X-ray diffraction revealed the presence of both spinel and perovskite phases after annealing with average crystallite sizes in the range of 9.0-14.5 nm. Transmission electron microscopy data showed two-phase composite nanostructures consisting of ferrites and barium titanate. The presence of interfacial connections between magnetic and ferroelectric phases was confirmed by high-resolution transmission electron microscopy. Magnetization data showed expected ferrimagnetic behavior and σs decrease after the nanocomposite formation. Magnetoelectric coefficient measurements after the annealing showed non-linear change with a maximum of 89 mV/cm*Oe with x = 0.5, 74 mV/cm*Oe with x = 0, and a minimum of 50 mV/cm*Oe with x = 0.0 core composition, that corresponds with the coercive force of the nanocomposites: 240 Oe, 89 Oe and 36 Oe, respectively. The obtained nanocomposites show low toxicity in the whole studied concentration range of 25-400 μg/mL on CT-26 cancer cells. The synthesized nanocomposites show low cytotoxicity and high magnetoelectric effects, therefore they can find wide applications in biomedicine.
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Affiliation(s)
- Timur R. Nizamov
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Abdulkarim A. Amirov
- Amirkhanov Institute of Physics of Dagestan Federal Research Center, Russian Academy of Sciences, 367003 Makhachkala, Russia
| | - Tatiana O. Kuznetsova
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Irina V. Dorofievich
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Igor G. Bordyuzhin
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Dmitry G. Zhukov
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Anna V. Ivanova
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Anna N. Gabashvili
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Nataliya Yu. Tabachkova
- Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | | | - Igor V. Shchetinin
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Maxim A. Abakumov
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
- Department of Medical Nanobiotechnology, N.I. Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Alexander G. Savchenko
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Alexander G. Majouga
- Department of Physical Materials Science, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia
- Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia
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13
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Zákutná D, Fischer A, Dresen D, Nižňanský D, Honecker D, Disch S. Multiscale magnetization in cobalt-doped ferrite nanocubes. J Appl Crystallogr 2022; 55:1622-1630. [PMID: 36570661 PMCID: PMC9721329 DOI: 10.1107/s1600576722010287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 10/24/2022] [Indexed: 12/03/2022] Open
Abstract
The magnetization of cobalt ferrite nanocubes of similar size, but with varying Co/Fe ratio, is extensively characterized on atomistic and nanoscopic length scales. Combination of X-ray diffraction, Mössbauer spectroscopy, magnetization measurements and polarized small-angle neutron scattering (SANS) reveals that a lower amount of cobalt leads to an enhanced magnetization. At the same time, magnetic SANS confirms no or negligible near-surface spin disorder in these highly crystalline, homogeneously magnetized nanoparticles, resulting in an exceptionally hard magnetic material with high coercivity.
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Affiliation(s)
- Dominika Zákutná
- Department of Chemistry, Universität zu Köln, Köln, Germany,Faculty of Science, Charles University, Prague, Czech Republic
| | - Anne Fischer
- Department of Chemistry, Universität zu Köln, Köln, Germany
| | | | | | - Dirk Honecker
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Didcot, United Kingdom
| | - Sabrina Disch
- Department of Chemistry, Universität zu Köln, Köln, Germany,Correspondence e-mail:
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14
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Adams MP, Michels A, Kachkachi H. Magnetic neutron scattering from spherical nanoparticles with Néel surface anisotropy: atomistic simulations. J Appl Crystallogr 2022; 55:1488-1499. [PMID: 36570659 PMCID: PMC9721337 DOI: 10.1107/s1600576722008949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 09/06/2022] [Indexed: 11/06/2022] Open
Abstract
A dilute ensemble of randomly oriented non-interacting spherical nanomagnets is considered, and its magnetization structure and ensuing neutron scattering response are investigated by numerically solving the Landau-Lifshitz equation. Taking into account the isotropic exchange interaction, an external magnetic field, a uniaxial magnetic anisotropy for the particle core, and in particular the Néel surface anisotropy, the magnetic small-angle neutron scattering cross section and pair-distance distribution function are calculated from the obtained equilibrium spin structures. The numerical results are compared with the well known analytical expressions for uniformly magnetized particles and provide guidance to the experimentalist. In addition, the effect of a particle-size distribution function is modelled.
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Affiliation(s)
- Michael P. Adams
- Department of Physics and Materials Science, University of Luxembourg, 162A avenue de la Faiencerie, L-1511 Luxembourg, Grand Duchy of Luxembourg
| | - Andreas Michels
- Department of Physics and Materials Science, University of Luxembourg, 162A avenue de la Faiencerie, L-1511 Luxembourg, Grand Duchy of Luxembourg
| | - Hamid Kachkachi
- Laboratoire PROMES CNRS UPR8521, Université de Perpignan via Domitia, Rambla de la Thermodynamique, Tecnosud, F-66100 Perpignan, France
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15
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Muzzi B, Lottini E, Yaacoub N, Peddis D, Bertoni G, de Julián Fernández C, Sangregorio C, López-Ortega A. Hardening of Cobalt Ferrite Nanoparticles by Local Crystal Strain Release: Implications for Rare Earth Free Magnets. ACS APPLIED NANO MATERIALS 2022; 5:14871-14881. [PMID: 36338325 PMCID: PMC9624260 DOI: 10.1021/acsanm.2c03161] [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: 07/19/2022] [Accepted: 09/01/2022] [Indexed: 06/16/2023]
Abstract
In this work, we demonstrate that the reduction of the local internal stress by a low-temperature solvent-mediated thermal treatment is an effective post-treatment tool for magnetic hardening of chemically synthesized nanoparticles. As a case study, we used nonstoichiometric cobalt ferrite particles of an average size of 32(8) nm synthesized by thermal decomposition, which were further subjected to solvent-mediated annealing at variable temperatures between 150 and 320 °C in an inert atmosphere. The postsynthesis treatment produces a 50% increase of the coercive field, without affecting neither the remanence ratio nor the spontaneous magnetization. As a consequence, the energy product and the magnetic energy storage capability, key features for applications as permanent magnets and magnetic hyperthermia, can be increased by ca. 70%. A deep structural, morphological, chemical, and magnetic characterization reveals that the mechanism governing the coercive field improvement is the reduction of the concomitant internal stresses induced by the low-temperature annealing postsynthesis treatment. Furthermore, we show that the medium where the mild annealing process occurs is essential to control the final properties of the nanoparticles because the classical annealing procedure (T > 350 °C) performed on a dried powder does not allow the release of the lattice stress, leading to the reduction of the initial coercive field. The strategy here proposed, therefore, constitutes a method to improve the magnetic properties of nanoparticles, which can be particularly appealing for those materials, as is the case of cobalt ferrite, currently investigated as building blocks for the development of rare-earth free permanent magnets.
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Affiliation(s)
- Beatrice Muzzi
- Department
of Biotechnology, Chemistry and Pharmacy, University of Siena 1240, I-53100Siena, Italy
- ICCOM−CNR, I-50019Sesto Fiorentino, Italy
- Department
of Chemistry “U. Schiff”, University of Florence and INSTM, I-50019Sesto Fiorentino, Italy
| | - Elisabetta Lottini
- Department
of Chemistry “U. Schiff”, University of Florence and INSTM, I-50019Sesto Fiorentino, Italy
| | - Nader Yaacoub
- IMMM,
Université du Mans, CNRS UMR-6283, F-72085Le Mans, France
| | - Davide Peddis
- Department
of Chemistry and Industrial Chemistry, University
of Genoa, I-16146Genova, Italy
- ISM−CNR, I-00015Monterotondo
Scalo, Italy
| | | | | | - Claudio Sangregorio
- ICCOM−CNR, I-50019Sesto Fiorentino, Italy
- Department
of Chemistry “U. Schiff”, University of Florence and INSTM, I-50019Sesto Fiorentino, Italy
| | - Alberto López-Ortega
- Department
of Chemistry “U. Schiff”, University of Florence and INSTM, I-50019Sesto Fiorentino, Italy
- Departamento
de Ciencias, Universidad Pública
de Navarra, E-31006Pamplona, Spain
- Institute
for Advanced Materials and Mathematics, Universidad Pública de Navarra, E-31006Pamplona, Spain
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16
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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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17
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Vukadinović A, Milanović Z, Ognjanović M, Janković D, Radović M, Mirković M, Karageorgou MA, Bouziotis P, Erić S, Vranješ-Đurić S, Antić B, Prijović Ž. 90Y-CA/SPIONs for dual magnetic hyperthermia-radionuclide nanobrachytherapy of solid tumours. NANOTECHNOLOGY 2022; 33:405102. [PMID: 35728572 DOI: 10.1088/1361-6528/ac7ac0] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Radiolabelled superparamagnetic iron oxide nanoparticles (SPIONs) are a promising nanomaterial for the development of dual radiation/hyperthermia cancer therapy. To that purpose, flower-shaped SPIONs with an exceptional heating capability were synthesised and coated with citrate, dextran or (3-aminopropyl)triethoxysilane. Both non-coated and coated SPIONs were nontoxic to CT-26 mouse colon cancer cells up to 1.0 mg ml-1in vitro. In an oscillating magnetic field, citrate-coated SPIONs (CA/SPIONs) displayed the highest heating rate (SAR ∼ 253 W g-1) and the strongest hyperthermia effects against CT-26 cells. Labelling of the CA/SPIONs by the90Y radionuclide, emitting β-radiation with an average/maximum energy of 0.94/2.23 MeV, and deep tissue penetration generated90Y-CA/SPIONs intended for the therapy of solid tumours. However, intravenous injection of90Y-CA/SPIONs in CT-26 xenograft-bearing mice resulted in low tumour accumulation. On the contrary, intratumoural injection resulted in long-term retention at the injection site. A single intratumoural injection of 0.25 mg CA/SPIONs followed by 30-min courses of magnetic hyperthermia for four consecutive days caused a moderate antitumour effect against CT-26 and 4T1 mouse tumour xenografts. Intratumoural application of 1.85 MBq/0.25 mg90Y-CA/SPIONs, alone or combined with hyperthermia, caused a significant (P ≤ 0.01) antitumour effect without signs of systemic toxicity. The results confirm the suitability of90Y-CA/SPIONs for monotherapy or dual magnetic hyperthermia-radionuclide nanobrachytherapy (NBT) of solid tumours.
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Affiliation(s)
- Aleksandar Vukadinović
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
| | - Zorana Milanović
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
| | - Miloš Ognjanović
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
| | - Drina Janković
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
| | - Magdalena Radović
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
| | - Marija Mirković
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
| | - Maria-Argyro Karageorgou
- Department of Physics, National and Kapodistrian University of Athens, Zografou Panepistimioupolis, GR-15784 Athens, Greece
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research 'Demokritos', Aghia Paraskevi, 15341 Athens, Greece
| | - Penelope Bouziotis
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, National Center for Scientific Research 'Demokritos', Aghia Paraskevi, 15341 Athens, Greece
| | - Slavica Erić
- Faculty of Pharmacy, University of Belgrade, 11001 Belgrade, Serbia
| | - Sanja Vranješ-Đurić
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
| | - Bratislav Antić
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
| | - Željko Prijović
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, 11001 Belgrade, Serbia
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18
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Jefremovas EM, Svedlindh P, Damay F, Alba Venero D, Michels A, Blanco JA, Fernández Barquín L. Magnetic order and disorder environments in superantiferromagnetic [Formula: see text] nanoparticles. Sci Rep 2022; 12:9733. [PMID: 35697857 PMCID: PMC9192703 DOI: 10.1038/s41598-022-13817-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 05/27/2022] [Indexed: 11/08/2022] Open
Abstract
Magnetic nanoparticles exhibit two different local symmetry environments, one ascribed to the core and one corresponding to the nanoparticle surface. This implies the existence of a dual spin dynamics, leading to the presence of two different magnetic arrangements governed by different correlation lengths. In this work, two ensembles of [Formula: see text] nanoparticles with mean sizes of 18 nm and 13 nm have been produced to unravel the magnetic couplings established among the magnetic moments located within the core and at the nanoparticle surface. To this end, we have combined neutron diffraction measurements, appropriate to investigate magnetically-ordered spin arrangements, with time-dependent macroscopic AC susceptibility measurements to reveal memory and aging effects. The observation of the latter phenomena are indicative of magnetically-frustrated states. The obtained results indicate that, while the [Formula: see text] magnetic moments located within the nanoparticle core keep the bulk antiferromagnetic commensurate structure in the whole magnetic state, the correlations among the surface spins give rise to a collective frustrated spin-glass phase. The interpretation of the magnetic structure of the nanoparticles is complemented by specific-heat measurements, which further support the lack of incommensurability in the nanoparticle state.
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Affiliation(s)
- E. M. Jefremovas
- Department CITIMAC, Facultad de Ciencias, Universidad de Cantabria, 39005 Santander, Spain
| | - P. Svedlindh
- Department of Materials Science and Engineering, Uppsala University, Box 35, 751 03 Uppsala, Sweden
| | - F. Damay
- Laboratoire Léon Brillouin, Université Paris–Saclay, CEA–CNRS, 91191 Gif–sur–Yvette Cedex, France
| | - D. Alba Venero
- ISIS Neutron and Muon Facility, Rutherford Appleton Laboratory, Didcot, OX11 0QX UK
| | - A. Michels
- Department of Physics and Materials Science, University of Luxembourg, 1511 Luxembourg, Luxembourg
| | - J. A. Blanco
- Department of Physics, University of Oviedo, 33007 Oviedo, Spain
| | - L. Fernández Barquín
- Department CITIMAC, Facultad de Ciencias, Universidad de Cantabria, 39005 Santander, Spain
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19
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Mao Y, Zhang Z, Zhan H, Sun J, Li Y, Su Z, Chen Y, Gao X, Huang X, Gu N. Revealing the crystal phases of primary particles formed during the coprecipitation of iron oxides. Chem Commun (Camb) 2022; 58:5749-5752. [PMID: 35446329 DOI: 10.1039/d2cc01617f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The mechanistic investigation of the coprecipitation formation of iron oxides has been a long-standing challenge due to the rapid reaction kinetics and high complexity of iron hydrolysis reactions. Although a few studies have suggested that the coprecipitation of iron oxide nanoparticles follows a non-classic route through inter-particle attachment, the compositions of the primary particles remain undetermined. Herein, by using a specially designed gas/liquid mixed phase fluidic reactor we controlled the reaction time from 3 s to over 5 min, and successfully identified the concentration of different intermediate phases as a function of time. We suggest that the initial Fe3+ ions are hydrolyzed under the alkaline condition to give Fe(OH)3, which then rapidly dehydrates to yield α-FeOOH. In the presence of Fe2+ ions, which could also act as the catalyst, α-FeOOH finally transforms to Fe3O4.
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Affiliation(s)
- Yu Mao
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, China.
| | - Zuoheng Zhang
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, China.
| | - Hongfeng Zhan
- State Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.
| | - Jianfei Sun
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, China.
| | - Yan Li
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, China.
| | - Zhenhuang Su
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
| | - Yonghua Chen
- State Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.
| | - Xingyu Gao
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
| | - Xiao Huang
- State Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.
| | - Ning Gu
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, China.
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20
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Idris AH, Che Abdullah CA, Yusof NA, Abdul Rahman MB. One-pot synthesis of iron oxide nanoparticles: Effect of stirring rate and reaction time on its physical characteristics. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2022.2072339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Auni Hamimi Idris
- Integrated Chemical BioPhysics Research, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang, Gambang, Pahang, Malaysia
| | - Che Azurahanim Che Abdullah
- Integrated Chemical BioPhysics Research, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Nor Azah Yusof
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Mohd Basyaruddin Abdul Rahman
- Integrated Chemical BioPhysics Research, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
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21
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Effect of Ti Atoms on Néel Relaxation Mechanism at Magnetic Heating Performance of Iron Oxide Nanoparticles. COATINGS 2022. [DOI: 10.3390/coatings12040481] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The study was based on understanding the relationship between titanium (Ti) doping amount and magnetic heating performance of magnetite (Fe3O4). Superparamagnetic nanosized Ti-doped magnetite ((Fe1−x,Tix)3O4; x = 0.02, 0.03 and 0.05) particles were synthesized by sol-gel technique. In addition to (Fe1−x,Tix)3O4 nanoparticles, SiO2 coated (Fe1−x,Tix)3O4 nanoparticles were produced as core-shell structures to understand the effects of silica coating on the magnetic properties of nanoparticles. Moreover, the magnetic properties were associated with the Néel relaxation mechanism due to the magnetic heating ability of single-domain state nanoparticles. In terms of results, it was observed that the induced RF magnetic field for SiO2 coated (Fe0.97,Ti0.03)3O4 nanoparticles caused an increase in temperature difference (ΔT), which reached up to 22 °C in 10 min. The ΔT values of SiO2 coated (Fe0.97,Ti0.03)3O4 nanoparticles were very close to the values of uncoated Fe3O4 nanoparticles.
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22
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Cheng Z, Du Y, Yu L, Yuan Z, Tian J. Application of Noninvasive Imaging to Combined Immune Checkpoint Inhibitors for Breast Cancer: Facts and Future. Mol Imaging Biol 2022; 24:264-279. [PMID: 35102468 DOI: 10.1007/s11307-021-01688-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 11/13/2021] [Accepted: 11/24/2021] [Indexed: 12/19/2022]
Abstract
With the application of mono-immunotherapy in cancer, particularly immune checkpoint inhibitors, improved outcomes have been achieved. However, there are several limitations to immunotherapy, such as a poor response to the drugs, immune resistance, and immune-related adverse events. In recent years, studies of preclinical animal models and clinical trials have demonstrated that immune checkpoint inhibitors for breast cancer can significantly prolong the overall survival and quality of patients' lives. Meanwhile, combined immune checkpoint inhibitor treatment has attracted researchers' attention and showed great potential in the comprehensive treatment of breast cancer patients. Additionally, noninvasive imaging enables physicians to predict response to combined immunotherapeutic drugs, achieve treatment efficacy, and lead to better clinical management. Herein, we review the background of combined immune checkpoint inhibitor therapy and summarize its targeted imaging as well as progress in noninvasive imaging aimed at evaluating therapeutic outcomes. Finally, we describe several factors that may influence the outcome of this combined immunotherapy, the future direction of medical imaging, and the potential application of artificial intelligence in breast cancer. With further development of noninvasive imaging for the guidance of combined immune checkpoint inhibitors, cures for this disease may be achieved.
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Affiliation(s)
- Zhongquan Cheng
- Department of General Surgery, Capital Medical University, Beijing Friendship Hospital, Beijing, 100050, China
- CAS Key Laboratory of Molecular Imaging, Key Laboratory of Molecular Imaging, The State Key Laboratory of Management and Control for Complex System, Institute of Automation, Chinese Academy of Sciences, BeijingBeijing, 100190, China
| | - Yang Du
- CAS Key Laboratory of Molecular Imaging, Key Laboratory of Molecular Imaging, The State Key Laboratory of Management and Control for Complex System, Institute of Automation, Chinese Academy of Sciences, BeijingBeijing, 100190, China.
- University of Chinese Academy of Sciences, Beijing, 100080, China.
| | - Leyi Yu
- Department of General Surgery, Capital Medical University, Beijing Friendship Hospital, Beijing, 100050, China
| | - Zhu Yuan
- Department of General Surgery, Capital Medical University, Beijing Friendship Hospital, Beijing, 100050, China.
| | - Jie Tian
- CAS Key Laboratory of Molecular Imaging, Key Laboratory of Molecular Imaging, The State Key Laboratory of Management and Control for Complex System, Institute of Automation, Chinese Academy of Sciences, BeijingBeijing, 100190, China.
- University of Chinese Academy of Sciences, Beijing, 100080, China.
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, School of Medicine Science and Engineering, Beihang University, Beijing, 100191, China.
- School of Life Science and Technology, Xidian University, Xi'an, Shaanxi, 710071, China.
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23
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Honecker D, Bersweiler M, Erokhin S, Berkov D, Chesnel K, Venero DA, Qdemat A, Disch S, Jochum JK, Michels A, Bender P. Using small-angle scattering to guide functional magnetic nanoparticle design. NANOSCALE ADVANCES 2022; 4:1026-1059. [PMID: 36131777 PMCID: PMC9417585 DOI: 10.1039/d1na00482d] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 01/15/2022] [Indexed: 05/14/2023]
Abstract
Magnetic nanoparticles offer unique potential for various technological, biomedical, or environmental applications thanks to the size-, shape- and material-dependent tunability of their magnetic properties. To optimize particles for a specific application, it is crucial to interrelate their performance with their structural and magnetic properties. This review presents the advantages of small-angle X-ray and neutron scattering techniques for achieving a detailed multiscale characterization of magnetic nanoparticles and their ensembles in a mesoscopic size range from 1 to a few hundred nanometers with nanometer resolution. Both X-rays and neutrons allow the ensemble-averaged determination of structural properties, such as particle morphology or particle arrangement in multilayers and 3D assemblies. Additionally, the magnetic scattering contributions enable retrieving the internal magnetization profile of the nanoparticles as well as the inter-particle moment correlations caused by interactions within dense assemblies. Most measurements are used to determine the time-averaged ensemble properties, in addition advanced small-angle scattering techniques exist that allow accessing particle and spin dynamics on various timescales. In this review, we focus on conventional small-angle X-ray and neutron scattering (SAXS and SANS), X-ray and neutron reflectometry, gracing-incidence SAXS and SANS, X-ray resonant magnetic scattering, and neutron spin-echo spectroscopy techniques. For each technique, we provide a general overview, present the latest scientific results, and discuss its strengths as well as sample requirements. Finally, we give our perspectives on how future small-angle scattering experiments, especially in combination with micromagnetic simulations, could help to optimize the performance of magnetic nanoparticles for specific applications.
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Affiliation(s)
- Dirk Honecker
- ISIS Neutron and Muon Facility, Rutherford Appleton Laboratory Didcot OX11 0QX UK
| | - Mathias Bersweiler
- Department of Physics and Materials Science, University of Luxembourg 162A Avenue de La Faïencerie L-1511 Luxembourg Grand Duchy of Luxembourg
| | - Sergey Erokhin
- General Numerics Research Lab Moritz-von-Rohr-Straße 1A D-07745 Jena Germany
| | - Dmitry Berkov
- General Numerics Research Lab Moritz-von-Rohr-Straße 1A D-07745 Jena Germany
| | - Karine Chesnel
- Brigham Young University, Department of Physics and Astronomy Provo Utah 84602 USA
| | - Diego Alba Venero
- ISIS Neutron and Muon Facility, Rutherford Appleton Laboratory Didcot OX11 0QX UK
| | - Asma Qdemat
- Universität zu Köln, Department für Chemie Luxemburger Straße 116 D-50939 Köln Germany
| | - Sabrina Disch
- Universität zu Köln, Department für Chemie Luxemburger Straße 116 D-50939 Köln Germany
| | - Johanna K Jochum
- Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München Lichtenbergstraße 1 85748 Garching Germany
| | - Andreas Michels
- Department of Physics and Materials Science, University of Luxembourg 162A Avenue de La Faïencerie L-1511 Luxembourg Grand Duchy of Luxembourg
| | - Philipp Bender
- Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München Lichtenbergstraße 1 85748 Garching Germany
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24
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Antonaropoulos G, Vasilakaki M, Trohidou KN, Iannotti V, Ausanio G, Abeykoon M, Bozin ES, Lappas A. Tailoring defects and nanocrystal transformation for optimal heating power in bimagnetic Co yFe 1-yO@Co xFe 3-xO 4 particles. NANOSCALE 2022; 14:382-401. [PMID: 34935014 DOI: 10.1039/d1nr05172e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The effects of cobalt incorporation in spherical heterostructured iron oxide nanocrystals (NCs) of sub-critical size have been explored by colloidal chemistry methods. Synchrotron X-ray total scattering methods suggest that cobalt (Co) substitution in rock salt iron oxide NCs tends to remedy their vacant iron sites, offering a higher degree of resistance to oxidative conversion. Self-passivation still creates a spinel-like shell, but with a higher volume fraction of the rock salt Co-containing phase in the core. The higher divalent metal stoichiometry in the rock salt phase, with increasing Co content, results in a population of unoccupied tetrahedral metal sites in the spinel part, likely through oxidative shell creation, involving an ordered defect-clustering mechanism, directly correlated to core stabilization. To shed light on the effects of Co-substitution and atomic-scale defects (vacant sites), Monte Carlo simulations suggest that the designed NCs, with desirable, enhanced magnetic properties (cf. exchange bias and coercivity), are developed with magnetocrystalline anisotropy which increases due to a relatively low content of Co ions in the lattice. The growth of optimally performing candidates combines also a strongly exchange-coupled system, secured through a high volumetric ratio rock salt phase, interfaced by a not so defective spinel shell. In view of these requirements, specific absorption rate (SAR) calculations demonstrate that the rock salt core sufficiently protected from oxidation and the heterostructure preserved over time, play a key role in magnetically mediated heating efficacies, for potential use of such NCs in magnetic hyperthermia applications.
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Affiliation(s)
- George Antonaropoulos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology - Hellas, Vassilika Vouton, 71110 Heraklion, Greece.
- Department of Chemistry, University of Crete, Voutes, 71003 Heraklion, Greece
| | - Marianna Vasilakaki
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research Demokritos, 15310 Athens, Greece
| | - Kalliopi N Trohidou
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research Demokritos, 15310 Athens, Greece
| | - Vincenzo Iannotti
- CNR-SPIN and Department of Physics "E. Pancini", University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
| | - Giovanni Ausanio
- CNR-SPIN and Department of Physics "E. Pancini", University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
| | - Milinda Abeykoon
- Photon Sciences Division, National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Emil S Bozin
- Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Alexandros Lappas
- Institute of Electronic Structure and Laser, Foundation for Research and Technology - Hellas, Vassilika Vouton, 71110 Heraklion, Greece.
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25
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Jiménez GL, Thevi Guntnur R, Guiliani J, Romero G. Enhancing magnetic hyperthermia in ferrite nanoparticles through shape anisotropy and surface hybridization. AIChE J 2021. [DOI: 10.1002/aic.17437] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Gloria L. Jiménez
- Department of Biomedical Engineering and Chemical Engineering University of Texas at San Antonio. One UTSA Circle San Antonio Texas USA
| | - Rohini Thevi Guntnur
- Department of Biomedical Engineering and Chemical Engineering University of Texas at San Antonio. One UTSA Circle San Antonio Texas USA
| | - Jason Guiliani
- Department of Physics and Astronomy University of Texas at San Antonio. One UTSA Circle San Antonio Texas USA
| | - Gabriela Romero
- Department of Biomedical Engineering and Chemical Engineering University of Texas at San Antonio. One UTSA Circle San Antonio Texas USA
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