A Novel Magnetophoretic-Based Device for Magnetometry and Separation of Single Magnetic Particles and Magnetized Cells

Lab on a Chip ◽  
2022 ◽  
Author(s):  
Roozbeh Abedini-Nassab ◽  
Xianting Ding ◽  
Haiyang Xie
Keyword(s):  
Magnetic Particles ◽  
Lab On A Chip ◽  
Magnetic Microparticles

The use of magnetic micro- and nanoparticles in medicine and biology is expanding. One important example is the transport of magnetic microparticles and magnetized cells in lab-on-a-chip systems. The magnetic...

Synchronous Control of Magnetic Particles and Magnetized Cells in a Tri-Axial Magnetic Field

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Roozbeh Abedini-Nassab ◽  
Sajjad Bahrami
Keyword(s):  
Magnetic Field ◽  
Magnetic Particles ◽  
Axial Magnetic Field ◽  
Lab On A Chip ◽  
Single Particles ◽  
Microfluidic Platform ◽  
Synchronous Control

Precise manipulation of single particles is one of the main goals in the lab-on-a-chip field. Here, we present a microfluidic platform with “T” and “I” shaped magnetic tracks on the...

Magnetic particles: From preparation to lab-on-a-chip, biosensors, microsystems and microfluidics applications

2016 ◽  
Vol 79 ◽  
pp. 344-362 ◽  
Author(s):  
Talha Jamshaid ◽  
Ernandes Taveira Tenório Neto ◽  
Mohamed M. Eissa ◽  
Nadia Zine ◽  
Marcos Hiroiuqui Kunita ◽  
...  
Keyword(s):  
Magnetic Particles ◽  
Lab On A Chip

scholarly journals MICRODYNAMICS OF MAGNETIC PARTICLES DISPERSED IN COMPLEX MEDIA

2011 ◽  
Vol 25 (07) ◽  
pp. 905-910
Author(s):  
G. BOSSIS ◽  
MODESTO T. LÓPEZ-LÓPEZ ◽  
A. ZUBAREV
Keyword(s):  
Magnetic Field ◽  
Magnetic Particles ◽  
Rubber Matrix ◽  
Simple Liquid ◽  
Complex Media ◽  
Magnetic Microparticles ◽  
Mr Fluids

The aggregation of magnetic particles in the presence of a magnetic field is the basic phenomenon which underlies all the physics of magnetorheological (MR) fluids. Although these interactions are well understood when the suspending fluid is a simple liquid, new MR fluids based on dispersion of magnetic microparticles in a ferrofluid or MR elastomers based on dispersion of magnetic particles in a rubber matrix, present some unusual properties which are not well described by conventional theories. We analyze in this work the motion of magnetic particles dispersed in a ferrofluid and submitted to a magnetic field and discuss the possible applications.

Numerical Analysis of Rapid Micromixers Utilizing Magnetic Particles

2007 ◽  
Author(s):  
Yiou Wang ◽  
Jiang Zhe ◽  
Benjamin T. F. Chung ◽  
Prashanta Dutta
Keyword(s):  
Numerical Analysis ◽  
Magnetic Particles ◽  
Magnetic Force ◽  
Magnetic Particle ◽  
Lab On A Chip ◽  
Switching Frequency ◽  
Magnetic Actuation ◽  
Lateral Dimension ◽  
Actuation Force ◽  
Good Agreement

Performances of a magnetic particle driven micromixer are predicted numerically. This micromixer takes advantages of mixing enhancements induced by alternating actuation of magnetic particles suspended in the fluid. Effects of the magnetic actuation force, switching frequency and channel’s lateral dimension have been investigated. Numerical results show that the magnetic particle actuation at an appropriate frequency causes effective mixing. The optimum switching frequency depends on the channel’s lateral dimension and the applied magnetic force. The optimum switching frequency obtained from the present numerical prediction is in good agreement with the theoretical analysis. The proposed simple mixing scheme not only provides an excellent mixing, even in simple microchannel, but also can be easily applied to “lab-on-a-chip” applications with a pair of external electromagnets.

Lab-on-a-Chip Systems for Microchemical Synthetic Applications

2011 ◽  
Author(s):  
Dong-Pyo Kim
Keyword(s):  
Magnetic Particles ◽  
Lab On A Chip ◽  
Functional Polymers ◽  
Microfluidic System ◽  
Organic Syntheses ◽  
Dual Channel ◽  
Flexible Film

Lab-on-a-chip microchemical systems were fabricated from PDMS, polyimide (PI) film and functional polymers by different lithographic techniques to look for microreactor applications in the areas of organic syntheses. In detail, efficient gas-liquid reactions in dual-channel microreactor, continuous recovery and recirculation of catalyst-immobilized magnetic particles in microfluidic system, and a flexible film microreactor will be discussed.

scholarly journals Microfluidic Synthesis, Control, and Sensing of Magnetic Nanoparticles: A Review

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 768
Author(s):  
Roozbeh Abedini-Nassab ◽  
Mahrad Pouryosef Miandoab ◽  
Merivan Şaşmaz
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Particles ◽  
Magnetic Measurement ◽  
Cross Flow ◽  
Lab On A Chip ◽  
Magnetic Thin Films ◽  
Portable Devices ◽  
Microfluidic Chips ◽  
Essential Information ◽  
Wide Range

Magnetic nanoparticles have attracted significant attention in various disciplines, including engineering and medicine. Microfluidic chips and lab-on-a-chip devices, with precise control over small volumes of fluids and tiny particles, are appropriate tools for the synthesis, manipulation, and evaluation of nanoparticles. Moreover, the controllability and automation offered by the microfluidic chips in combination with the unique capabilities of the magnetic nanoparticles and their ability to be remotely controlled and detected, have recently provided tremendous advances in biotechnology. In particular, microfluidic chips with magnetic nanoparticles serve as sensitive, high throughput, and portable devices for contactless detecting and manipulating DNAs, RNAs, living cells, and viruses. In this work, we review recent fundamental advances in the field with a focus on biomedical applications. First, we study novel microfluidic-based methods in synthesizing magnetic nanoparticles as well as microparticles encapsulating them. We review both continues-flow and droplet-based microreactors, including the ones based on the cross-flow, co-flow, and flow-focusing methods. Then, we investigate the microfluidic-based methods for manipulating tiny magnetic particles. These manipulation techniques include the ones based on external magnets, embedded micro-coils, and magnetic thin films. Finally, we review techniques invented for the detection and magnetic measurement of magnetic nanoparticles and magnetically labeled bioparticles. We include the advances in anisotropic magnetoresistive, giant magnetoresistive, tunneling magnetoresistive, and magnetorelaxometry sensors. Overall, this review covers a wide range of the field uniquely and provides essential information for designing “lab-on-a-chip” systems for synthesizing magnetic nanoparticles, labeling bioparticles with them, and sorting and detecting them on a single chip.

A magnetic super lattice

1987 ◽  
Vol 45 ◽  
pp. 360-361 ◽  
Author(s):  
M.D. Bentzon ◽  
J. v. Wonterghem ◽  
A. Thölén
Keyword(s):  
Thermal Decomposition ◽  
Oleic Acid ◽  
Magnetic Fluid ◽  
Magnetic Particles ◽  
Carbon Film ◽  
Thick Layer ◽  
Amorphous Iron ◽  
Super Lattice ◽  
Carrier Liquid ◽  
Median Diameter

We report on the oxidation of a magnetic fluid. The oxidation results in magnetic super lattice crystals. The “atoms” are hematite (α-Fe2O3) particles with a diameter ø = 6.9 nm and they are covered with a 1-2 nm thick layer of surfactant molecules.Magnetic fluids are homogeneous suspensions of small magnetic particles in a carrier liquid. To prevent agglomeration, the particles are coated with surfactant molecules. The magnetic fluid studied in this work was produced by thermal decomposition of Fe(CO)5 in Declin (carrier liquid) in the presence of oleic acid (surfactant). The magnetic particles consist of an amorphous iron-carbon alloy. For TEM investigation a droplet of the fluid was added to benzine and a carbon film on a copper net was immersed. When exposed to air the sample starts burning. The oxidation and electron irradiation transform the magnetic particles into hematite (α-Fe2O3) particles with a median diameter ø = 6.9 nm.

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