1
|
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.
Collapse
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
| |
Collapse
|
2
|
Sadat ME, Bud’ko SL, Ewing RC, Xu H, Pauletti GM, Mast DB, Shi D. Effect of Dipole Interactions on Blocking Temperature and Relaxation Dynamics of Superparamagnetic Iron-Oxide (Fe 3O 4) Nanoparticle Systems. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16020496. [PMID: 36676230 PMCID: PMC9866362 DOI: 10.3390/ma16020496] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 12/22/2022] [Accepted: 12/22/2022] [Indexed: 05/14/2023]
Abstract
The effects of dipole interactions on magnetic nanoparticle magnetization and relaxation dynamics were investigated using five nanoparticle (NP) systems with different surfactants, carrier liquids, size distributions, inter-particle spacing, and NP confinement. Dipole interactions were found to play a crucial role in modifying the blocking temperature behavior of the superparamagnetic nanoparticles, where stronger interactions were found to increase the blocking temperatures. Consequently, the blocking temperature of a densely packed nanoparticle system with stronger dipolar interactions was found to be substantially higher than those of the discrete nanoparticle systems. The frequencies of the dominant relaxation mechanisms were determined by magnetic susceptibility measurements in the frequency range of 100 Hz-7 GHz. The loss mechanisms were identified in terms of Brownian relaxation (1 kHz-10 kHz) and gyromagnetic resonance of Fe3O4 (~1.12 GHz). It was observed that the microwave absorption of the Fe3O4 nanoparticles depend on the local environment surrounding the NPs, as well as the long-range dipole-dipole interactions. These significant findings will be profoundly important in magnetic hyperthermia medical therapeutics and energy applications.
Collapse
Affiliation(s)
- Md Ehsan Sadat
- Department of Physics, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Sergey L. Bud’ko
- Ames Laboratory, Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
| | - Rodney C. Ewing
- Department of Geological Sciences, Stanford University, Stanford, CA 94305-2115, USA
| | - Hong Xu
- Med-X Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Giovanni M. Pauletti
- Department of Pharmaceutical and Administrative Sciences, St. Louis College of Pharmacy, University of Health Sciences & Pharmacy, St. Louis, MO 63110, USA
| | - David B. Mast
- Department of Physics, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Donglu Shi
- The Materials Science and Engineering Program, Department of Mechanical and Materials Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH 45221, USA
- Correspondence:
| |
Collapse
|
3
|
Muscas G, Congiu F, Concas G, Cannas C, Mameli V, Yaacoub N, Hassan RS, Fiorani D, Slimani S, Peddis D. The Boundary Between Volume and Surface-Driven Magnetic Properties in Spinel Iron Oxide Nanoparticles. NANOSCALE RESEARCH LETTERS 2022; 17:98. [PMID: 36219264 PMCID: PMC9554062 DOI: 10.1186/s11671-022-03737-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 10/02/2022] [Indexed: 06/16/2023]
Abstract
Despite modern preparation techniques offer the opportunity to tailor the composition, size, and shape of magnetic nanoparticles, understanding and hence controlling the magnetic properties of such entities remains a challenging task, due to the complex interplay between the volume-related properties and the phenomena occurring at the particle's surface. The present work investigates spinel iron oxide nanoparticles as a model system to quantitatively analyze the crossover between the bulk and the surface-dominated magnetic regimes. The magnetic properties of ensembles of nanoparticles with an average size in the range of 5-13 nm are compared. The role of surface anisotropy and the effect of oleic acid, one of the most common and versatile organic coatings, are discussed. The structural and morphological properties are investigated by X-ray diffraction and transmission electron microscopy. The size dependence of the surface contribution to the effective particle anisotropy and the magnetic structure are analyzed by magnetization measurements and in-field Mössbauer spectrometry. The structural data combined with magnetometry and Mössbauer spectrometry analysis are used to shed light on this complex scenario revealing a crossover between volume and surface-driven properties in the range of 5-7 nm.
Collapse
Affiliation(s)
- Giuseppe Muscas
- Department of Physics, University of Cagliari, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy.
| | - Francesco Congiu
- Department of Physics, University of Cagliari, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy
| | - Giorgio Concas
- Department of Physics, University of Cagliari, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy
| | - Carla Cannas
- Università Degli Studi Di Cagliari, Dipartimento Di Scienze Chimiche E Geologiche, and INSTM, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy
| | - Valentina Mameli
- Università Degli Studi Di Cagliari, Dipartimento Di Scienze Chimiche E Geologiche, and INSTM, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy
| | - Nader Yaacoub
- IMMM, Le Mans Université, CNRS UMR-6283, Avenue Olivier Messiaen, 72085, Le Mans, France
| | - Rodaina Sayed Hassan
- IMMM, Le Mans Université, CNRS UMR-6283, Avenue Olivier Messiaen, 72085, Le Mans, France
- Department of Physics, Faculty of Science, Lebanese University, Beirut, Lebanon
| | - Dino Fiorani
- Istituto Di Struttura Della Materia-CNR, 00015, Monterotondo Scalo, RM, Italy
| | - Sawssen Slimani
- Dipartimento Di Chimica E Chimica Industriale, Università Degli Studi Di Genova, Via Dodecaneso 31, 1-16146, Genoa, Italy
- Istituto Di Struttura Della Materia-CNR, 00015, Monterotondo Scalo, RM, Italy
| | - Davide Peddis
- Dipartimento Di Chimica E Chimica Industriale, Università Degli Studi Di Genova, Via Dodecaneso 31, 1-16146, Genoa, Italy.
- Istituto Di Struttura Della Materia-CNR, 00015, Monterotondo Scalo, RM, Italy.
| |
Collapse
|
4
|
Kim H. Analysis of Agglomeration Kinetics of Magnetic Nanoparticles With Boltzmann Distribution of Energy Barrier. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hackjin Kim
- Department of Chemistry Chungnam National University Daejeon 34134 Korea
| |
Collapse
|
5
|
Magnetic Properties Study of Iron Oxide Nanoparticles-Loaded Poly(ε-caprolactone) Nanofibres. MAGNETOCHEMISTRY 2021. [DOI: 10.3390/magnetochemistry7050061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Magnetic nanofibres have attracted more and more attention recently due to their possible applications e.g., in spintronics and neuromorphic computing. This work presents the synthesis and physicochemical characterization of the electrospun nanofibres of poly(ε-caprolactone) (PCL) doped by iron oxide nanoparticles with diameters of 5 nm. PCL is a semi-crystalline, hydrophilic polymer showing controllable biodegradation rates, biocompatibility, and flexible mechanical properties. In the composite material, two different concentrations of magnetic nanoparticles were used: 2 and 6 wt.%. PCL-based composites were investigated using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetry (TGA). Although in the literature one can find many studies on magnetic polymeric composites, the investigation of their magnetic properties is usually limited to measuring the magnetization curve. Detailed analysis of dynamic magnetic susceptibility is rather rare. In this report, special attention was paid to the detailed analysis of magnetic properties, where we followed the evolution of changes in the magnetic behavior of the material depending on the concentration of magnetic nanoparticles.
Collapse
|
6
|
Talone A, Ruggiero L, Slimani S, Imperatori P, Barucca G, Ricci MA, Sodo A, Peddis D. Magnetic mesoporous silica nanostructures: investigation of magnetic properties. NANOTECHNOLOGY 2020; 31:465707. [PMID: 32877370 DOI: 10.1088/1361-6528/abac7c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Magnetic mesoporous silica (MS) nanocomposites provide the possibility of generating multi-functional objects for application in different technological areas. This paper focuses on the magnetic properties of nanocomposites constituted by spinel iron oxide nanoparticles (magnetic nanoparticles (MNPs), < D > ≈ 8-9 nm) embedded in an MS matrix. The mesoporous structure of the silica matrix and the presence of the nanoparticles inside clearly emerge from transmission electron microscopy (TEM) measurements. Low temperature (5 K) field-dependent magnetization measurements reveal saturation magnetization (MS ) close to bulk value (M S bulk ∼ 90 emu g-1) for both MNPs and MNP/MS nanocomposites, indicating that the presence of silica does not affect the magnetic features of the single MNPs. Moreover, the dependence of the remanent magnetization on field (i.e. δM plots) at low temperature has shown a small but evident decrease of interaction in an MNP/MS sample with respect to MNP samples A m2 Kg-1. Finally, a partial orientation of the easy axis is observed when the MNPs are embedded in the silica matrix.
Collapse
Affiliation(s)
- A Talone
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Monterotondo Scalo (RM), Italy. Dipartimento di Scienze, Università degli Studi 'Roma Tre', Roma, Italy
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Barrera G, Allia P, Tiberto P. Fine tuning and optimization of magnetic hyperthermia treatments using versatile trapezoidal driving-field waveforms. NANOSCALE ADVANCES 2020; 2:4652-4664. [PMID: 36132915 PMCID: PMC9417573 DOI: 10.1039/d0na00358a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 08/27/2020] [Indexed: 06/12/2023]
Abstract
Applying trapezoidal driving-field waveforms to activate magnetic nanoparticles optimizes their performance as heat generators in magnetic hyperthermia, with notable advantages with respect to the effects of harmonic magnetic fields of the same frequency and amplitude. A rate equation approach is used to determine the hysteretic properties and the power released by monodisperse and polydisperse magnetite nanoparticles with randomly oriented easy axes subjected to a radio-frequency trapezoidal driving field. The heating ability of the activated nanoparticles is investigated by means of a simple model in which the heat equation is solved in radial geometry with boundary conditions simulating in vivo applications. Changes of the inclination of the trapezoidal waveform's lateral sides are shown to induce controlled changes in the specific loss power generated by the activated nanoparticles. Specific issues typical of the therapeutic practice of hyperthermia, such as the need for fine tuning of the optimal treatment temperature in real time, the possibility of combining sequential treatments at different temperatures, and the ability to substantially reduce the heating transient in a hyperthermia treatment are suitably addressed and overcome by making use of versatile driving fields of a trapezoidal shape.
Collapse
Affiliation(s)
- Gabriele Barrera
- INRIM, Advanced Materials Metrology and Life Sciences Strada delle Cacce 91 I-10135 Torino Italy +39 011 3919858
| | - Paolo Allia
- INRIM, Advanced Materials Metrology and Life Sciences Strada delle Cacce 91 I-10135 Torino Italy +39 011 3919858
| | - Paola Tiberto
- INRIM, Advanced Materials Metrology and Life Sciences Strada delle Cacce 91 I-10135 Torino Italy +39 011 3919858
| |
Collapse
|
8
|
Mamiya H, Fukumoto H, Cuya Huaman JL, Suzuki K, Miyamura H, Balachandran J. Estimation of Magnetic Anisotropy of Individual Magnetite Nanoparticles for Magnetic Hyperthermia. ACS NANO 2020; 14:8421-8432. [PMID: 32574042 DOI: 10.1021/acsnano.0c02521] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Ideal interaction-free magnetite nanoparticles were prepared, and their magnetic properties were measured to clarify the true nature of magnetic anisotropy of individual magnetite nanoparticles at the nanoscale and to analyze the shape, surface, and crystalline anisotropy contributions. Spherical (17.7 nm), cubic (10.6 nm), and octahedral-shaped magnetite nanoparticles with average sizes ranging from 7.6 to 23.4 nm were synthesized using solution techniques. Then, these nanoparticles were coated with silica at appropriate shell thicknesses to prepare magnetic interaction-free samples, and their noninteractive nature was confirmed through first-order reversal curve diagrams. For these well-isolated nanoparticles, remanent magnetizations of the hysteresis loops are just equal to a half of the saturation magnetization. This result clearly indicates that uniaxial magnetic anisotropy is predominant in each nanoparticle. In order to clarify the details of the uniaxial magnetic anisotropy, the analysis of blocking temperature-switching field distribution diagrams is constructed based on thermal decay curves of isothermal remanent magnetization at various applied fields. The obtained effective magnetic anisotropy constant Keff is distributed around 10-20 kJ/m3 and has insignificant size dependence. This result seems inconsistent with the inverse proportion relation of Keff with size predicted for surface magnetic anisotropy. The theoretical calculation suggested that the crystalline magnetic anisotropy plays a major role in magnetic properties of the magnetite nanoparticles at lower temperatures. However, it should be noted that Keff seems slightly different for the different shapes. The above study indicates that control size, shape, and interparticle interactions is required to strictly discuss such delicate differences of magnetic anisotropy of individual magnetite nanoparticles for the design of thermal seeds for magnetic hyperthermia.
Collapse
Affiliation(s)
- Hiroaki Mamiya
- National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
| | - Hiroya Fukumoto
- Department of Materials Science, The University of Shiga Prefecture, Hikone, Shiga 522-8533, Japan
| | - Jhon L Cuya Huaman
- Department of Materials Science, The University of Shiga Prefecture, Hikone, Shiga 522-8533, Japan
| | - Kazumasa Suzuki
- Department of Materials Science, The University of Shiga Prefecture, Hikone, Shiga 522-8533, Japan
| | - Hiroshi Miyamura
- Department of Materials Science, The University of Shiga Prefecture, Hikone, Shiga 522-8533, Japan
| | - Jeyadevan Balachandran
- Department of Materials Science, The University of Shiga Prefecture, Hikone, Shiga 522-8533, Japan
| |
Collapse
|
9
|
Magnetocrystalline and Surface Anisotropy in CoFe 2O 4 Nanoparticles. NANOMATERIALS 2020; 10:nano10071288. [PMID: 32629977 PMCID: PMC7408426 DOI: 10.3390/nano10071288] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/13/2020] [Accepted: 06/26/2020] [Indexed: 11/22/2022]
Abstract
The effect of the annealing temperature Tann on the magnetic properties of cobalt ferrite nanoparticles embedded in an amorphous silica matrix (CoFe2O4/SiO2), synthesized by a sol-gel auto-combustion method, was investigated by magnetization and AC susceptibility measurements. For samples with 15% w/w nanoparticle concentration, the particle size increases from ~2.5 to ~7 nm, increasing Tann from 700 to 900 °C. The effective magnetic anisotropy constant (Keff) increases with decreasing Tann, due to the increase in the surface contribution. For a 5% w/w sample annealed at 900 °C, Keff is much larger (1.7 × 106 J/m3) than that of the 15% w/w sample (7.5 × 105 J/m3) annealed at 700 °C and showing comparable particle size. This indicates that the effect of the annealing temperature on the anisotropy is not only the control of the particle size but also on the core structure (i.e., cation distribution between the two spinel sublattices and degree of spin canting), strongly affecting the magnetocrystalline anisotropy. The results provide evidence that the magnetic anisotropy comes from a complex balance between core and surface contributions that can be controlled by thermal treatments.
Collapse
|
10
|
Dennis CL, Jackson AJ, Borchers JA, Gruettner C, Ivkov R. Correlation between physical structure and magnetic anisotropy of a magnetic nanoparticle colloid. NANOTECHNOLOGY 2018; 29:215705. [PMID: 29493534 DOI: 10.1088/1361-6528/aab31d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We show the effects of a time-invariant magnetic field on the physical structure and magnetic properties of a colloid comprising 44 nm diameter magnetite magnetic nanoparticles, with a 24 nm dextran shell, in water. Structural ordering in this colloid parallel to the magnetic field occurs simultaneously with the onset of a colloidal uniaxial anisotropy. Further increases in the applied magnetic field cause the nanoparticles to order perpendicular to the field, producing unexpected colloidal unidirectional and trigonal anisotropies. This magnetic behavior is distinct from the cubic magnetocrystalline anisotropy of the magnetite and has its origins in the magnetic interactions among the mobile nanoparticles within the colloid. Specifically, these field-induced anisotropies and colloidal rearrangements result from the delicate balance between the magnetostatic and steric forces between magnetic nanoparticles. These magnetic and structural rearrangements are anticipated to influence applications that rely upon time-dependent relaxation of the magnetic colloids and fluid viscosity, such as magnetic hyperthermia and shock absorption.
Collapse
Affiliation(s)
- C L Dennis
- Material Measurement Laboratory, NIST, Gaithersburg, MD 20899, United States of America
| | | | | | | | | |
Collapse
|
11
|
|
12
|
Moya C, Iglesias-Freire Ó, Batlle X, Labarta A, Asenjo A. Superparamagnetic versus blocked states in aggregates of Fe(3-x)O₄ nanoparticles studied by MFM. NANOSCALE 2015; 7:17764-17770. [PMID: 26456633 DOI: 10.1039/c5nr04424c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Magnetic domain configurations in two samples containing small aggregates of Fe(3-x)O4 nanoparticles of about 11 and 49 nm in size, respectively, were characterized by magnetic force microscopy (MFM). Two distinct magnetic behaviors were observed depending on the particle size. The aggregates constituted of nanoparticles of about 11 nm in size showed a uniform dark contrast on MFM images, reflecting the predominant superparamagnetic character of these particles and arising from the coherent rotation of the spins within the aggregate as the latter align along the tip stray-field. By applying a variable in-plane field, it is possible to induce magnetic polarization yielding an increasing dark/bright contrast as the strength of the applied field overcomes the stray-field of the tip, although this polarization completely disappears as the remanent state is recovered when the magnetic field is switched off. On the contrary, for aggregates of NPs of about 49 nm in size, dark/bright contrast associated with the existence of magnetic domains and magnetic polarization prevails in MFM images all along the magnetic cycle due to the blocking state of the magnetization of these larger particles, even in the absence of an applied field. All in all, we unambiguously demonstrate the capabilities of magnetic force microscopy to distinguish between blocked and superparamagnetic states in the aggregates of magnetic nanoparticles. Micromagnetic simulations strongly support the conclusions stated from the MFM experiments.
Collapse
Affiliation(s)
- Carlos Moya
- Departament de Física Fonamental, Institut de Nanociència i Nanotecnologia, Universitat de Barcelona, Barcelona, 08028, Spain.
| | | | | | | | | |
Collapse
|
13
|
Lee N, Yoo D, Ling D, Cho MH, Hyeon T, Cheon J. Iron Oxide Based Nanoparticles for Multimodal Imaging and Magnetoresponsive Therapy. Chem Rev 2015; 115:10637-89. [PMID: 26250431 DOI: 10.1021/acs.chemrev.5b00112] [Citation(s) in RCA: 576] [Impact Index Per Article: 64.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Nohyun Lee
- School of Advanced Materials Engineering, Kookmin University , Seoul 136-702, Korea
| | - Dongwon Yoo
- Department of Chemistry, Yonsei University , Seoul 120-749, Korea
| | - Daishun Ling
- Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Korea.,School of Chemical and Biological Engineering, Seoul National University , Seoul 151-742, Korea.,Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University , Hangzhou 310058, PR China
| | - Mi Hyeon Cho
- Department of Chemistry, Yonsei University , Seoul 120-749, Korea
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Korea.,School of Chemical and Biological Engineering, Seoul National University , Seoul 151-742, Korea
| | - Jinwoo Cheon
- Department of Chemistry, Yonsei University , Seoul 120-749, Korea
| |
Collapse
|
14
|
Landers J, Stromberg F, Darbandi M, Schöppner C, Keune W, Wende H. Correlation of superparamagnetic relaxation with magnetic dipole interaction in capped iron-oxide nanoparticles. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:026002. [PMID: 25502104 DOI: 10.1088/0953-8984/27/2/026002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Six nanometer sized iron-oxide nanoparticles capped with an organic surfactant and/or silica shell of various thicknesses have been synthesized by a microemulsion method to enable controllable contributions of interparticle magnetic dipole interaction via tunable interparticle distances. Bare particles with direct surface contact were used as a reference to distinguish between interparticle interaction and surface effects by use of Mössbauer spectroscopy. Superparamagnetic relaxation behaviour was analyzed by SQUID-magnetometry techniques, showing a decrease of the blocking temperature with decreasing interparticle interaction energies kBT0 obtained by AC susceptibility. A many-state relaxation model enabled us to describe experimental Mössbauer spectra, leading to an effective anisotropy constant Keff ≈ 45 kJm(-3) in case of weakly interacting particles, consistent with results from ferromagnetic resonance. Our unique multi-technique approach, spanning a huge regime of characteristic time windows from about 10 s to 5 ns, provides a concise picture of the correlation of superparamagnetic relaxation with interparticle magnetic dipole interaction.
Collapse
Affiliation(s)
- J Landers
- Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstr. 1, D-47048 Duisburg, Germany
| | | | | | | | | | | |
Collapse
|
15
|
|
16
|
Obaidat IM, Issa B, Haik Y. Magnetic Properties of Magnetic Nanoparticles for Efficient Hyperthermia. NANOMATERIALS 2015; 5:63-89. [PMID: 28347000 PMCID: PMC5312856 DOI: 10.3390/nano5010063] [Citation(s) in RCA: 186] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Accepted: 12/30/2014] [Indexed: 11/16/2022]
Abstract
Localized magnetic hyperthermia using magnetic nanoparticles (MNPs) under the application of small magnetic fields is a promising tool for treating small or deep-seated tumors. For this method to be applicable, the amount of MNPs used should be minimized. Hence, it is essential to enhance the power dissipation or heating efficiency of MNPs. Several factors influence the heating efficiency of MNPs, such as the amplitude and frequency of the applied magnetic field and the structural and magnetic properties of MNPs. We discuss some of the physics principles for effective heating of MNPs focusing on the role of surface anisotropy, interface exchange anisotropy and dipolar interactions. Basic magnetic properties of MNPs such as their superparamagnetic behavior, are briefly reviewed. The influence of temperature on anisotropy and magnetization of MNPs is discussed. Recent development in self-regulated hyperthermia is briefly discussed. Some physical and practical limitations of using MNPs in magnetic hyperthermia are also briefly discussed.
Collapse
Affiliation(s)
- Ihab M Obaidat
- Department of Physics, United Arab Emirates University, Al-Ain 15551, United Arab Emirates.
| | - Bashar Issa
- Department of Physics, United Arab Emirates University, Al-Ain 15551, United Arab Emirates.
| | - Yousef Haik
- Department of Mechanical Engineering, United Arab Emirates University, Al-Ain 15555, United Arab Emirates.
- Center for Research Excellence in Nanobiosciences, University of North Carolina at Greensboro, Greensboro, NC 27412, USA.
| |
Collapse
|
17
|
Figueroa AI, Moya C, Bartolomé J, Bartolomé F, García LM, Pérez N, Labarta A, Batlle X. SiO2 coating effects in the magnetic anisotropy of Fe3-xO4 nanoparticles suitable for bio-applications. NANOTECHNOLOGY 2013; 24:155705. [PMID: 23518930 DOI: 10.1088/0957-4484/24/15/155705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present radio frequency transverse susceptibility (TS) measurements on oleic acid-coated and SiO2-coated Fe3-xO4 magnetite nanoparticles. The effects of the type of coating on the interparticle interactions and magnetic anisotropy are evaluated for two different particle sizes in powder samples. On the one hand, SiO2 coating reduces the interparticle interactions as compared to oleic acid coating, the reduction being more effective for 5 nm than for 14 nm diameter particles. On the other hand, the magnetic anisotropy field at low temperature is lower than 1 kOe in all cases and independent of the coating used. Our results are relevant concerning applications in biomedicine, since the SiO2 coating renders 5 and 14 nm hydrophilic particles with very limited agglomeration, low anisotropy, and superparamagnetic behavior at room temperature. The TS technique also allows us to discriminate the influence on the anisotropy field of interparticle interactions from that of the thermal fluctuations.
Collapse
Affiliation(s)
- A I Figueroa
- Departamento de Física de la Materia Condensada, Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC-Universidad de Zaragoza, Zaragoza, Spain.
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Martínez G, Malumbres A, Mallada R, Hueso JL, Irusta S, Bomatí-Miguel O, Santamaría J. Use of a polyol liquid collection medium to obtain ultrasmall magnetic nanoparticles by laser pyrolysis. NANOTECHNOLOGY 2012; 23:425605. [PMID: 23037862 DOI: 10.1088/0957-4484/23/42/425605] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The present work addresses the main bottleneck in the synthesis of magnetic nanoparticles by laser pyrolysis. Since the introduction of laser pyrolysis for the production of nanoparticles nearly three decades ago, this method has been repeatedly presented as a highly promising alternative, on account of two main characteristics: (i) its flexibility, since nanoparticles can be formed from a wide variety of precursors in both gas and liquid phase, and (ii) its continuous nature, avoiding the intrinsic variability of batch processing. However, the results reported to date invariably show considerable aggregation of the obtained nanoparticles, which strongly limits their application in most fields. In this work, we have been able to circumvent this problem by collecting the particles in a polyol liquid medium. This method prevents the formation of aggregates and renders a uniform distribution of well dispersed ultrasmall nanoparticles (<4 nm) in a water-compatible solvent. We consider that the effectiveness of this novel collection method for the production of well-dispersed magnetic nanoparticles will be of high interest to a wide range of scientists working in the nanoparticle synthesis field and may enable new applications wherever there is a strict requirement for non-agglomerated nanoparticles.
Collapse
Affiliation(s)
- G Martínez
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 50018-Zaragoza, Spain.
| | | | | | | | | | | | | |
Collapse
|
19
|
Tian L, Cao C, Pan Y. The influence of reaction temperature on biomineralization of ferrihydrite cores in human H-ferritin. Biometals 2011; 25:193-202. [DOI: 10.1007/s10534-011-9497-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2010] [Accepted: 09/19/2011] [Indexed: 11/30/2022]
|
20
|
Rebodos RL, Vikesland PJ. Effects of oxidation on the magnetization of nanoparticulate magnetite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:16745-16753. [PMID: 20879747 DOI: 10.1021/la102461z] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Synthetic nanomagnetite has been suggested as a potential reactant for the in situ treatment of contaminated groundwater. Although the application of magnetite nanoparticles for environmental remediation is promising, a full understanding of particle reactivity has been deterred by the propensity of the nanoparticles to aggregate and become colloidally unstable. Attractive magnetic interactions between particles are partially responsible for their aggregation. In this study, we characterized the magnetic behavior of magnetite by determining the saturation magnetization, coercivity, remanent magnetization, susceptibility, and blocking temperature of synthetic magnetite using a superconducting quantum interference device (SQUID). We show how these properties vary in the presence of surface-associated solutes such as tetramethylammonium (TMA(+)) and ferrous (Fe(II)) cations. More importantly, because magnetite readily reacts with O(2) to produce maghemite, we analyzed the effect of oxidation on the magnetic properties of the particles. Because maghemite has a reported magnetic saturation that is less than that of magnetite, we hypothesized that oxidation would decrease the magnitude of the magnetic attractive force between adjacent particles. The presence of TMA(+) and Fe(II) caused a change in the magnetic properties of magnetite potentially because of alterations in its crystalline order. Magnetite oxidation caused a decrease in saturation magnetization, resulting in less significant magnetic interactions between particles. Oxidation, therefore, could lead to the decreased aggregation of magnetite nanoparticles and a potential enhancement of their colloidal stability.
Collapse
Affiliation(s)
- Robert L Rebodos
- Department of Civil and Environmental Engineering and The Institute of Critical Technology and Applied Science, NSF-EPA Center for the Environmental Implications of Nanotechnology, Virginia Tech, Blacksburg, Virginia 24060, USA
| | | |
Collapse
|
21
|
Guardia P, Pérez-Juste J, Labarta A, Batlle X, Liz-Marzán LM. Heating rate influence on the synthesis of iron oxide nanoparticles: the case of decanoic acid. Chem Commun (Camb) 2010; 46:6108-10. [PMID: 20661498 DOI: 10.1039/c0cc01179g] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iron oxide nanoparticles with uniform sizes between 13 nm and 180 nm can be selectively prepared through the "heating up" thermal decomposition method by using decanoic acid and carefully tuning the heating rate.
Collapse
Affiliation(s)
- Pablo Guardia
- Departament de Física Fonamental and Institut de Nanociència i Nanotecnologia, Universitat de Barcelona, 08028 Barcelona, Spain
| | | | | | | | | |
Collapse
|
22
|
Cao C, Tian L, Liu Q, Liu W, Chen G, Pan Y. Magnetic characterization of noninteracting, randomly oriented, nanometer-scale ferrimagnetic particles. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jb006855] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
23
|
Guardia P, Pérez N, Labarta A, Batlle X. Controlled synthesis of iron oxide nanoparticles over a wide size range. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:5843-7. [PMID: 20000725 DOI: 10.1021/la903767e] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We report on the effect of using decanoic acid as capping ligand on the synthesis of iron oxide nanoparticles by thermal decomposition of an organic iron precursor in organic medium. This procedure allowed us to control the particle size within 5 nm and about 30 nm by modifying the precursor-to-capping ligand ratio in a systematic fashion and to further expand the particle size range up to about 50 nm by adjusting the final synthesis temperature. The nanoparticles also showed high saturation magnetization of about 80-83 emu/g at low temperature, almost size-independent and close to the value for the bulk counterpart. Decanoic acid-coated nanoparticles were transferred to water by using tetramethylammonium hydroxide, which allowed further coating with silica in a tetraethyl orthosilicate solution. Consequently, these iron oxide nanoparticles are tunable in size and highly magnetic, and they could become suitable candidates for various biomedical applications such as contrast agents for magnetic resonance imaging and magnetic carriers for drug delivery.
Collapse
Affiliation(s)
- Pablo Guardia
- Departament de Física Fonamental and Institut de Nanociència i Nanotecnologia, Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain.
| | | | | | | |
Collapse
|
24
|
Peddis D, Cannas C, Piccaluga G, Agostinelli E, Fiorani D. Spin-glass-like freezing and enhanced magnetization in ultra-small CoFe2O4 nanoparticles. NANOTECHNOLOGY 2010; 21:125705. [PMID: 20203355 DOI: 10.1088/0957-4484/21/12/125705] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The magnetic properties of ultra-small (3 nm) CoFe(2)O(4) nanoparticles have been investigated by DC magnetization measurements as a function of temperature and magnetic field. The main features of the magnetic behaviour are blocking of non-interacting particle moments (zero-field-cooled magnetization T(max) approximately 40 K), a rapid increase of saturation magnetization (up to values higher than for the bulk material) at low T and an increase in anisotropy below 30 K due to the appearance of exchange bias. The low temperature behaviour is determined by a random freezing of surface spins. Localized spin-canting and cation distribution between the two sublattices of the spinel structure account quantitatively for the observed increase in saturation magnetization.
Collapse
Affiliation(s)
- D Peddis
- CNR-Istituto di Struttura della Materia, Monterotondo Stazione, (RM), Italy
| | | | | | | | | |
Collapse
|
25
|
Bellusci M, La Barbera A, Seralessandri L, Padella F, Piozzi A, Varsano F. Preparation of albumin-ferrite superparamagnetic nanoparticles using reverse micelles. POLYM INT 2009. [DOI: 10.1002/pi.2642] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|