Article
Multidisciplinary Sciences
L. Cervera-Gabalda, C. Gomez-Polo
Summary: Magnetic induction heating (MIH) is used to synthesize carbon-based magnetic nanocomposites by mechanically mixing magnetic nanoparticles (Fe3O4) and fructose in a 1:2 weight ratio, and subjecting them to a RF magnetic field (305 kHz). The heat generated by the nanoparticles leads to the formation of an amorphous carbon matrix through the decomposition of the sugar. Structural, electrical, and magnetic characterizations confirm the carbon-coating of the nanoparticles through the MIH procedure. The synthesized nanocomposites have optimized properties for various technological applications, such as the removal of Cr (VI) from aqueous media using the carbon nanocomposite with 20 nm Fe3O4 nanoparticles.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Y. A. Urian, J. J. Atoche-Medrano, Luis T. Quispe, L. Leon Felix, J. A. H. Coaquira
Summary: The study details the synthesis and characterization of oleic acid-coated Fe3O4 nanoparticles of different sizes, revealing their structural and magnetic properties. The results suggest a core/shell structure formed by magnetite/defective magnetite phases, with the presence of weakly and strongly bonded oleic acid molecules on the surface. The temperature dependence of magnetization and AC magnetic susceptibility measurements provide insights into non-interacting and interacting nanoparticles behavior.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Takehiro Yachi, Masaki Matsubara, Chen Shen, Shunya Asami, Nathalie B. Milbrandt, Minseon Ju, Sameera Wickramasinghe, Anna Cristina S. Samia, Atsushi Muramatsu, Kiyoshi Kanie
Summary: Introduction of carboxyl group enabled excellent water dispersibility and stability of monodisperse Fe3O4 nanoparticles, making them suitable for applications such as water-based ferrofluid and hyperthermia treatment. The COOH-modified Fe3O4 NPs exhibited typical ferrofluid behavior and high dispersion stability in water for over 6 months. Magnetic induction heating performance evaluation yielded a specific absorption rate (SAR) value of 38.3 W/g Fe, indicating the potential advantages of the developed nanoparticles for precise surface design and therapeutic applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Qian Liu, Zhenrong Tan, Dafeng Zheng, Xueqing Qiu
Summary: A magnetic delivery system for targeted drug was developed using aminated lignosulfonate (ALS) and carboxymethyl chitosan (CMCS) to fabricate nano Fe3O4 with pH responsiveness. The system successfully loaded doxorubicin hydrochloride (DOX) and demonstrated controlled release of the drug. The particle size ranged from 79.9-169.9 nm under optimized conditions and exhibited excellent pH responsiveness. The drug-loaded particles showed significant growth inhibition on cancer cells.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Nanoscience & Nanotechnology
Natalia da Silva Moura, Khashayar R. Bajgiran, Adam T. Melvin, Kerry M. Dooley, James A. Dorman
Summary: The temperature gradient between the surface of magnetic nanoparticles (NP) and the bulk medium has been observed, necessitating a more accurate description of the nanoparticle surface temperature. In this study, inorganic luminescent probes in direct contact with the particle surface were used, providing high spatial resolution with temperatures up to 64 degrees Celsius higher than standard fiber-optic probes.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Mariia A. Mikhailova, Ivan Yu Chernyshov, Georgii A. Illarionov, Denis S. Kolchanov, Oleg A. Kuchur, Alexandr V. Vinogradov, Sofia M. Morozova, Maxim Morozov
Summary: In this study, the physical properties, morphology, and biocompatibility of magnetite nanoparticles obtained by hydrolytic and non-hydrolytic synthesis routes were examined. It was found that magnetite nanoparticles obtained via the hydrolytic route have a significantly high resistive switching ratio, making them suitable for resistive switching applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Renpeng Yang, Xiaogang Yu, Heng Li, Chao Wang, Chengwei Wu, Wei Zhang, Weihong Guo
Summary: Mg2+ substitution can increase the Curie temperature and specific saturation magnetization of the nanoparticles within a certain range, leading to improved heating efficiency and low cytotoxicity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Marco Sanna Angotzi, Valentina Mameli, Shankar Khanal, Miroslav Veverka, Jana Vejpravova, Carla Cannas
Summary: In this study, the effect of different molecular coatings on the heating properties of maghemite nanoparticles in water dispersions was investigated. It was found that surface modification through intercalation processes induced particle clustering, leading to reduced heating performance. Understanding the evolution of SPA and ILP over time and temperature provided a broader comprehension of the heating phenomenon in this dynamic system.
NANOSCALE ADVANCES
(2022)
Review
Chemistry, Multidisciplinary
Yiwei Zhang, Xinxin Li, Yajie Zhang, Jun Wei, Wei Wang, Changzhi Dong, Yanan Xue, Min Liu, Renjun Pei
Summary: Fe3O4 nanoparticles, approved by the FDA, have unique properties that make them ideal for cancer diagnosis and therapy. Their potential as theranostic nanoplatforms in individual therapies in the near future is promising.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Wen-chan Ji, Ping Hu, Xiao-yu Wang, Bo Chen, Tian Chang, Fairy Fan Yang, Qi-gao Cao, Wen Zhang, Rui Dang, Kuai-she Wang
Summary: This paper optimized a one-step carbothermal reduction method for producing Fe3O4 nanoparticles with small size, strong magnetism, and high heating rates. The influence of alternating magnetic field parameters on heating rates was studied, leading to the identification of the optimal heating conditions under specific parameters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Construction & Building Technology
Dengwu Jiao, Karel Lesage, Mert Yucel Yardimci, Khadija El Cheikh, Caijun Shi, Geert De Schutter
Summary: The effects of concentration and particle size of nano-Fe3O4 particles on the evolution of structural build-up of cementitious paste under magnetic field were investigated experimentally and verified theoretically. The magnetic field enhances the liquid-like properties and magneto-rheological effect of the cementitious paste with nano-Fe3O4 particles. The movement velocity of nano-Fe3O4 particles is proportional to the increase rate of loss modulus in the early age of the paste.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Chemistry, Physical
Saso Gyergyek, Elena Chernyshova, Katalin Boor, Marijan Necemer, Darko Makovec
Summary: In this study, magnetic carbon nanocomposites were prepared by carbothermal reduction of iron-oxide nanoparticles. These nanocomposites exhibit ferromagnetic behavior and consist of Fe/Fe3C nanoparticles encapsulated in a graphitic shell. The graphitic shell prevents the oxidation of the Fe nanoparticles and maintains their magnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Itziar Galarreta-Rodriguez, Alberto Lopez-Ortega, Eneko Garayo, Juan Jesus Beato-Lopez, Paulo La Roca, Vicente Sanchez-Alarcos, Vicente Recarte, Cristina Gomez-Polo, Jose Ignacio Perez-Landazabal
Summary: Additive manufacturing technology has gained attention for its versatility in design and easy manufacture of structural and functional elements using composite materials. This study focuses on the development of low-cost magnetically active polymeric composites by embedding magnetic nanoparticles in a polymeric blend. The composites were prepared using the solution casting method and extruded into continuous and flexible filaments for 3D printing. The filaments exhibited magnetic properties and the ability to generate heat under low-frequency alternating magnetic fields, making them suitable for various applications such as magnetic hyperthermia and drug release.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Chemistry, Physical
Bijaideep Dutta, Swati Checker, K. C. Barick, H. G. Salunke, Vikram Gota, P. A. Hassan
Summary: By grafting malic acid onto the surface of Fe3O4, we designed highly water-dispersible Fe3O4 magnetic nanoparticles with good aqueous colloidal stability, pH-dependent surface charge characteristics, and superparamagnetic behavior. The optimized electrostatic conjugation of drug onto MMNCs surface achieved a maximum loading efficiency of 72%, resulting in pH-dependent controlled release characteristics and dose-dependent cellular uptake of DOX-MMNCs, showing considerable toxicity towards breast cancer cells. Additionally, our magnetic hyperthermia studies demonstrated the excellent heating efficiency of the MMNCs for safe application in hyperthermia therapy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Manufacturing
Chuanhui Xu, Mengzhuan Lin, Xinghuo Wang, Qi Shen, Zhongjie Zheng, Baofeng Lin, Lihua Fu
Summary: This study successfully prepared Fe3O4-based magnetic elastomer composites using the latex film-forming method. The addition of CMCS significantly improved the dispersion of Fe3O4 and the interfacial compatibility with XSBR matrix. The composite exhibited enhanced tensile strength and saturation magnetization compared to neat XSBR.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Electrical & Electronic
Truong Xuan Nguyen, Ngan Thuy Thi Dang, Vuong Van Nguyen
Summary: High-performance bulk magnets based on MnBi alloys have attracted researchers globally due to their high performance at high temperatures and absence of rare earth elements. However, these magnets have a low intrinsic spontaneous magnetization and lower saturation magnetization, making magnetization and coercivity values dependent on the preparation techniques.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Minh-Tri Nguyen-Le, Cuu Khoa Nguyen, Pham Hong Nam, Dao Thi Thoa, Nguyen Van Phong, Nguyen Huu Tri, Nguyen Minh Viet, Tran Thi Viet Ha, Luu Huu Nguyen
Summary: In this study, a facile EDTA-Na2 assisted method was used to synthesize CQD deposited titanate based materials for photocatalytic degradation of methylene blue (MB) dye. The obtained materials showed stronger visible light absorption and enhanced photocatalytic activity in MB degradation.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
L. T. T. Ngan, N. T. Dang, N. X. Phuc, L. Bau, N. Dang, D. H. Manh, P. H. Nam, L. H. Nguyen, P. T. Phong
Summary: The magnetic and electrical properties of substituted La0.7Sr0.3Mn1-xCoxO3 perovskite (0 ≤ x ≤ 1) were investigated. The study revealed that Co4+ ions were in a high spin state, while the spin state of Co3+ ions changed from high spin to intermediate-spin state at x=0.8. The metallic conduction behavior of x=0 and x=1 samples was analyzed using an empirical equation, showing the importance of electron-magnon scattering effects. All other samples exhibited semiconductor-like behavior throughout the studied temperature range. The resistivity data of semiconducting La0.7Sr0.3Mn1-xCoxO3 could be fitted to the variable range hopping model, with the hopping distance and average hopping energy decreasing with increasing Co concentration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Truong Xuan Nguyen, Oanh Kim Thi Vuong, Ngan Thuy Thi Dang, Anh Kha Vuong, Long Viet Nguyen, Hang Nhat Thi Nguyen, Trung Quoc Nguyen, Vuong Van Nguyen
Summary: This research investigates the effects of solvothermal synthesis on the morphology and magnetic properties of Co nanowires. It found that the reaction temperature, reaction time, and hexadecylamine concentrations have a significant impact on the magnetic properties of the Co nanowires. The best magnetic properties were achieved with an aspect ratio of 10, synthesized at a temperature of 175 degrees C, reaction time of 20 hours, and hexadecylamine concentration of 0.6 mmol.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Le Tri Dat, Luu Huu Nguyen, Nguyen Hoai Nam, Tuan Dinh Van, Le The Tam, Nguyen Xuan Truong, Van-Quynh Nguyen, Pham Thanh Phong, Pham Hong Nam
Summary: This study investigated the effect of Fe3O4 nanoparticle concentration on magnetic anisotropy using Monte Carlo simulations. The results showed that the magnetic anisotropy increased with nanoparticle concentration, which explained the dual behavior of SAR value with concentration. Experimental results and theoretical simulations agreed well, demonstrating the important role of magnetic anisotropy in enhancing SAR values.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Article
Optics
N. T. M. Thuy, V. T. K. Lien, P. Do, V. T. K. Oanh, N. X. Truong, N. X. Ca, N. T. Hien, P. M. Tan
Summary: ZnS semiconductor quantum dots (QDs) co-doped with Er3+ and Sm3+ ions were successfully prepared using a wet chemical method. The presence of Er3+ and Sm3+ in the ZnS host was confirmed by XRD and XPS. The QDs showed a zinc blende (ZB) structure with a spherical shape and a particle size of about 4 nm. The optical properties were studied by varying the Er3+ ion concentration while keeping the Sm3+ ion concentration constant. The results revealed covalency between the ligands and rare-earth ions, and confirmed the energy transfer processes between the ZnS host and Er3+ ions, as well as between Er3+ and Sm3+ ions.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Ceramics
Luu Huu Nguyen, Le The Tam, Nguyen Hoai Nam, Do Khanh Tung, Nguyen Xuan Truong, Dinh Van Tuan, Nguyen Van Quynh, Nguyen Le Minh Tri, Pham Thanh Phong, Pham Hong Nam
Summary: In this study, MnFe2O4 doped Gd (MnGdxFe2-xO4 with x = 0, 0.125, 0.25, and 0.5) magnetic nanoparticles were successfully synthesized, and the effect of Gd content on the structural, optical, and magnetic properties was investigated. The replacement of Fe3+ ions with Gd3+ ions resulted in a change in crystallite size and band gap. The saturation magnetization and magnetic anisotropy decreased with increasing Gd3+ ion concentration. The substantial reliance of magnetic anisotropy on the doping concentration was demonstrated.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Condensed Matter
Luu Huu Nguyen, Le Minh Thu, Bui Duc Tinh
Summary: In this study, the superconducting fluctuation optical conductivity in iron-based superconductors is investigated using the time-dependent Ginzburg-Landau Lawrence-Doniach model with thermal noise. The temperature-dependent superconducting fluctuation optical conductivity in the homogeneous phase is calculated. The theoretical result based on the self-consistent Gaussian approximation fits well with the experimental data of FeSe0.5Te0.5, accurately describing the real and imaginary parts of the superconducting fluctuation optical conductivity around Tc. The agreement between the superfluid density and experimental data confirms the existence of residual superconductivity above Tc due to strong thermal fluctuations.
EUROPEAN PHYSICAL JOURNAL B
(2023)
Article
Materials Science, Multidisciplinary
Pham Hoai Linh, Julia Fedotova, Svetlana Vorobyova, Luu Huu Nguyen, Tran Thi Huong, Hong Nhung Nguyen, Thi Ngoc Anh Nguyen, Anh Son Hoang, Quang Anh Nguyen, Uladzislaw Gumiennik, Artem Konakov, Maxim Bushinskij, Pawel Zukowski, Tomasz N. Koltunowicz
Summary: In this study, core-shell (Fe25Co75)(x)(SiO2)(100-x) nanoparticles were synthesized using the metals co-precipitation method followed by SiO2 TEOS deposition. The nanoparticles exhibited nearly spherical structures with alpha-FeCo bcc alloy cores and SiO2 shells. Increasing SiO2 shell thickness was found to decrease magnetization and effective magnetic anisotropy, with an optimal thickness range of 90 to 120 nm for the highest specific absorption rate (SAR). The nanoparticles also showed high drug loading capacity and low in-vitro cytotoxicity, making them suitable for smart drug delivery systems.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Physical
Thi Thao Truong, Thi Tam Khieu, Huu Nguyen Luu, Hai Bang Truong, Van Khien Nguyen, Truong Xuan Vuong, Thi Kim Ngan Tran
Summary: This study synthesized PLE-doped ZnO nanoparticles using the co-precipitation method and evaluated their biomedical activity. The results showed that the ZPS50 nanoparticles had the smallest size, the richest surface organic functional groups, and the best optical activity. They exhibited high antibacterial activity against P. aeruginosa and S. aureus, and moderate effectiveness against KB cancer cells.
Article
Chemistry, Multidisciplinary
Quang-Hai Le, Thu-Uyen Tran, Van-Tuan Dinh, Hoai-Nam Nguyen, Hong-Nam Pham, Xuan-Truong Nguyen, Luong-Lam Nguyen, Thi-Mai-Thanh Dinh, Van-Quynh Nguyen
Summary: This paper presents an effective method for fabricating an inverse opal (IO) structure doped with silver nanoparticles (AgNPs) for plasmon-induced hyperthermia applications. Indium tin oxide (ITO) substrates were modified electrochemically with an IO-PEDOT layer, which served as working electrodes for electrodepositing AgNPs. The hybrid of IO-PEDOT and AgNPs exhibited much higher heat generation than thin-film PEDOT, thin-film PEDOT/AgNPs, and IO-PEDOT under laser irradiation, thanks to the synergistic effect between the large active area inverse opal structure and doped AgNPs. These findings highlight the potential applications of IO-PEDOT/AgNPs in hyperthermia treatment.
Article
Chemistry, Physical
Luu Huu Nguyen, Nguyen Hoai Nam, Le The Tam, Dinh Van Tuan, Nguyen Xuan Truong, Nguyen Van Quynh, Phan Thi Hong Tuyet, Ha Phuong Thu, Do Hung Manh, Pham Thanh Phong, Pham Hong Nam
Summary: This study synthesized Fe3-xGdxO4 nanoparticles and investigated the impact of Gd content on the structural characteristics. The results showed that the nanoparticles had a size distribution between 9 and 12.5 nm, and both the saturation magnetization and magnetic anisotropy decreased with the increase of band gap. The experimental results also demonstrated that Fe2.75Gd0.25O4 nanoparticles with specific doping content had the highest therapeutic absorption rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
L. T. H. Phong, N. T. Dang, N. Dang, Van-Quynh Nguyen, D. H. Manh, P. H. Nam, L. H. Nguyen, P. T. Phong
Summary: This study investigates the structure, optical, and electrical conductivity properties of BaTi1-xCoxO3 ceramics prepared by the hydrothermal method. The results show that the concentration of Co influences the optical band gap and conduction mechanism of the material.
