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Related Concept Videos

Magnetic Fields01:27

Magnetic Fields

8.1K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
8.1K
Ferromagnetism01:31

Ferromagnetism

3.6K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
3.6K
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

5.1K
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
5.1K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

7.1K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
7.1K
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

2.9K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
2.9K
Magnetic Force01:18

Magnetic Force

2.5K
In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...
2.5K

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Magnet Assisted Composite Manufacturing: A Flexible New Technique for Achieving High Consolidation Pressure in Vacuum Bag/Lay-Up Processes
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Multifunctional layered magnetic composites.

Maria Siglreitmeier1, Baohu Wu2, Tina Kollmann3

  • 1Department of Chemistry, Physical Chemistry, University of Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany.

Beilstein Journal of Nanotechnology
|February 12, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel hybrid material using abalone shell matrix infiltrated with gelatin to synthesize magnetite nanoparticles (MNPs). This method allows controlled mineral loading for advanced material applications.

Keywords:
bio-inspired mineralizationbiomineralizationchitinferrogelhybrid materialsmagnetitenacre

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Nanotechnology

Background:

  • Nacre, a natural composite, offers a unique organic matrix structure.
  • Developing multifunctional hybrid materials with controlled properties is a key research area.

Purpose of the Study:

  • To fabricate a novel multifunctional hybrid material using the nacreous organic matrix.
  • To synthesize and control the loading of magnetite nanoparticles (MNPs) within this matrix.
  • To characterize the structural, magnetic, and mechanical properties of the resulting hybrid material.

Main Methods:

  • Utilized the insoluble organic nacre matrix from Haliotis laevigata shells infiltrated with gelatin.
  • Synthesized magnetite nanoparticles (MNPs) within the organic scaffold.
  • Employed small-angle and very-small-angle neutron scattering (SANS and VSANS) for structural analysis.
  • Used transmission electron microscopy (TEM) and magnetic analysis for material characterization.
  • Performed simulation studies and atomic force microscopy (AFM) for nucleation and mechanical property assessment.

Main Results:

  • Achieved controlled mineral loadings of MNPs from 15 wt % to 65 wt %.
  • Confirmed an unchanged organic matrix structure after demineralization and gelatin infiltration.
  • Observed homogeneous gelatin infiltration within the chitin layers.
  • Characterized the hybrid material with a layered structure containing ~10 nm MNPs exhibiting superparamagnetic behavior.
  • Identified chitin as a preferred nucleator for magnetite synthesis over collagen.
  • Demonstrated an increase in composite material stiffness upon ferrogel introduction.

Conclusions:

  • A novel method for fabricating multifunctional hybrid materials with tunable magnetite nanoparticle content was established.
  • The nacre-derived organic matrix serves as an effective scaffold for controlled nanoparticle synthesis.
  • The resulting hybrid material exhibits desirable magnetic properties and enhanced mechanical stiffness, indicating potential for diverse applications.