Article
Biochemical Research Methods
Umer Sajjad, Finn Klingbeil, Findan Block, Rasmus B. Hollander, Shehroz Bhatti, Enno Lage, Jeffrey McCord
Summary: The research focuses on achieving high efficiency separation for biological analytes in biomedical applications by selectively and directionally controlling the movement of microbeads through adjusting magnetic fields. Despite significant size and magnetic content distributions within microbead populations, high separation efficiencies are demonstrated.
Review
Biochemistry & Molecular Biology
Bin Zhang, Xichen Yuan, Huanhuan Lv, Jingmin Che, Shenghang Wang, Peng Shang
Summary: This review explores the biological effects of static magnetic fields (SMFs) and their mechanisms on biological systems. The mechanisms mainly include the induction of electric fields and currents, generation of magnetic effects, and influence of electron spins. This paper helps people harness the favorable biological effects of SMFs.
PROGRESS IN BIOPHYSICS & MOLECULAR BIOLOGY
(2023)
Review
Biochemistry & Molecular Biology
Massimo E. Maffei
Summary: This review examines the relationship between human exposure to electromagnetic fields and cancer, focusing on epidemiological studies indicating a positive correlation. It also discusses the in vivo and in vitro effects of electromagnetic fields on cancer and explores the use of magnetic resonance imaging and magnetic nanoparticles in cancer diagnosis and therapy.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Analytical
Xuewen Peng, Yongzhen Dong, Niu Feng, Qiaoling Wei, Peng Lu, Yiping Chen
Summary: A novel immunomagnetic separation carrier Fe3O4 @PDA-antibody was synthesized for the specific enrichment of deoxynivalenol. The Fe3O4 @PDA-antibody nano-recognizer could activate the aggregation of antigen-functionalized polystyrene beads through the antigen-antibody reaction, which was then driven into a microchannel to induce a change in current. This approach integrated extraction, immuno-reaction, and detection effectively, providing a tool for ultrasensitive detection of deoxynivalenol.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Xinyi Wan, Xiao Wang, Ting Wan, Youguo Yan, Zhizhen Ye, Xinsheng Peng
Summary: Inspired by the function of AQP1 in biological membranes for gas selectivity, a thin graphene oxide/magnetic ionic liquid membrane (GO/MILM) was developed for efficient CO2 separation, exhibiting superior performance compared to most reported membranes. The membrane shows fast permeance, high selectivity, and stability, with potential applications in industrial CO2 separation.
APPLIED MATERIALS TODAY
(2021)
Article
Computer Science, Information Systems
Vladimir L. L. Safonov, Michael E. E. McConney, Michael R. R. Page
Summary: A general self-consistent theory is constructed to describe the adaptive properties of a ferromagnetic single-domain grain in alternating magnetic fields. The thresholds of a new family of parametric instabilities of all orders are calculated. It is found that the level of magnetic moment excitation and the phase of forced oscillations can describe emerging nonequilibrium states effectively. The overthreshold excited state, determined by third- and fourth-order nonlinear interactions and deviations of the ferromagnetic moment, is analyzed. Adaptive nonequilibrium states are characterized by non-linear damped oscillations and describe energy flows from the pump field to the thermal bath. Near the frequency of these oscillations, mixing of weak RF signals with the microwave pump field and amplification of RF modulation of the pump field are observed. The developed theory can be applied to other physical systems using mathematical analogies.
Article
Chemistry, Multidisciplinary
Mingyue Chen, Wenda Zhou, Kun Ye, Cailei Yuan, Mengyuan Zhu, Hao Yu, Hongzhou Yang, He Huang, Yanfei Wu, Jingyan Zhang, Xinqi Zheng, Jianxin Shen, Xiao Wang, Shouguo Wang
Summary: This study successfully confines monodisperse 1T-VSe2 nanoparticles in an amorphous carbon matrix using a facile pulsed laser deposition (PLD) method combined with rapid thermal annealing (RTA) treatment. With external magnetic fields of 800 mT stimulation, these confined 1T-VSe2 nanoparticles exhibit highly efficient oxygen evolution reaction (OER) catalytic activity and remarkable durability. The experimental results demonstrate that magnetic fields can facilitate the surface charge transfer dynamics of 1T-VSe2, and modify the adsorption-free energy of *OOH, thus improving the intrinsic activity of the catalysts. This work realizes the application of ferromagnetic VSe2 electrocatalyst in highly efficient spin-dependent OER kinetics and promotes the application of transition metal chalcogenides (TMCs) in external magnetic field-assisted electrocatalysis.
Article
Biophysics
Chengbin Yang, Xiangyu Gan, Yuping Zeng, Zhourui Xu, Longqian Xu, Chenxuan Hu, Hanbi Ma, Bao Chai, Siyi Hu, Yujuan Chai
Summary: This review summarizes the recent advances of digital microfluidic (DMF) technology in the biomedical field, including the integrated design and applications of DMF systems, droplets and magnetic beads manipulation strategies, and various biomedical applications.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Physics, Applied
Anderson Paschoa, Jorge L. Gonzalez, Valberto P. Nascimento, Edson C. Passamani
Summary: Hybrid superconducting/ferromagnetic heterostructures were fabricated and analyzed, showing that the stray field values are on the same order of magnitude but with different strengths among the thin ferromagnetic layers. The effective fields acting on the superconducting layer in different structures were quantified, with the 2nm-thick ferromagnetic Py layer playing a significant role in contributing to the effective fields. The spin-valve effect values were discussed and demonstrated to have physical origins related to the contributions of the Py and Co layers and the proximity effect.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2021)
Article
Materials Science, Multidisciplinary
M. S. Hesam, V. Mashayekhi, M. Nazari, M. M. Shahmardan, A. Nameni
Summary: In this paper, sputtered magnetic electrodes are utilized to separate different magnetic particles in a microfluidic device. The design consists of a 30 mm microchannel with three outlets, using Nickel electrodes with different angles and thicknesses. A permanent magnet produces a uniform magnetic field and the presence of the magnetic wires disturbs the field, resulting in magnetic force applied to the particles. The study analyzes important parameters such as particle size, wire dimensions, wire spacing, wire angle, and flow rate. Results show that M-450 particles are more affected and increasing wire angle and distance between wires can reduce particle deviation.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Mohd Imran, Adnan Mohammed Affandi, Md Mottahir Alam, Afzal Khan, Asif Irshad Khan
Summary: Ferrofluids, as stable colloidal suspensions of magnetic nanoparticles in base fluids, exhibit high thermal conductivity, good stability, and magnetic properties. They are mainly based on iron oxide nanostructures due to their easy synthesis and low costs. In biomedical applications, ferrofluids can be used for hyperthermia, drug delivery, MRI, and cell separation.
Article
Materials Science, Multidisciplinary
Mehdi Fadaei, Sahand Majidi, Mohammad Mojaddam
Summary: In this study, the generation of ferrofluid droplets in a co-flowing microchannel under the influence of a uniform magnetic field was numerically investigated. The effects of field direction, magnetic Bond number, and two-phase flow rate ratio on droplet formation characteristics were examined. The results showed that the dimensionless diameter and velocity of droplets increased with an increase in magnetic Bond number for the parallel magnetic field, while they decreased by 5.15% and 36.91% for the vertical field, respectively. The effects of magnetic Bond number on droplet formation became insignificant when the flow pattern transformed from dripping to slug flow regime at a magnetic Bond number of more than 4.24. Moreover, increasing the two-phase flow rate ratio led to a decrease in droplet dimensionless diameter and an increase in dimensionless velocity.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yanqiang Li, Hongxiang Jiang, Hao Sun, Lili Zhang, Jie He, Jiuzhou Zhao
Summary: This study demonstrates that composite electric and magnetic fields (CEMFs) can decrease the size of minority phase particles and promote a more uniform distribution. A theoretical model is established to describe the microstructure evolution during cooling. Numerical simulations are consistent with experimental data, showing that CEMFs affect solidification process by changing melt convection and nucleation behavior.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Yu Wang, Jie Wang
Summary: The study proposes a temperature-dependent real space phase field model to investigate stable topological magnetic structures in ferromagnetic thin films under different external conditions. It is found that tensile biaxial strain enhances the stability of skyrmions, while skyrmions can be stabilized under both tensile and compressive strains with uniaxial strain.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Chengxiao Peng, Wenjuan Fan, Qian Li, Wenna Han, Xuefeng Chen, Guangbiao Zhang, Yuli Yan, Qinfen Gu, Chao Wang, Huarong Zhang, Peiyu Zhang
Summary: This review highlights recent breakthroughs in enhancing photocatalytic reactions by manipulating spin states and applying external magnetic fields, and provides a summary of the relevant characterization techniques and fundamental mechanisms. The unique roles of spin polarization states and the effects of external magnetic fields on photocatalytic performance are extensively discussed, offering new insights into the design of new semiconductors for boosting photocatalytic performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
