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Characterizing and imaging magnetic nanoparticles by optical magnetometry
- Source :
- Journal of Physics: Conference Series. 793:012032
- Publication Year :
- 2017
- Publisher :
- IOP Publishing, 2017.
-
Abstract
- We review our ongoing work on deploying optical (atomic) magnetometry for measuring the magnetic response of magnetic nanoparticle (MNP) samples, yielding MNP size distributions, and other sample parameters like Neel relaxation time τ, saturation magnetisation Ms , anisotropy constant K and magnetic susceptibility χ. We address magnetorelaxation (MRX) signals, in which the decaying magnetisation M(t) following a magnetising pulse is recorded by a single atomic magnetometer or by a novel magnetic source imaging camera (MSIC) allowing spatially resolved MRX studies of distributed MNP samples. We further show that optical magnetometers can be used for a direct measurement of the M(H) and dM/dH(H) dependencies of MNP samples, the latter forming the basis for an optical magnetometer implementation of the MPI (Magnetic Particle Imaging) method. All experiments are in view of developing biomedical imaging modalities.
- Subjects :
- 010302 applied physics
History
Materials science
Magnetometer
Nanoparticle
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Magnetic susceptibility
Computer Science Applications
Education
law.invention
Magnetization
Nuclear magnetic resonance
Magnetic particle imaging
law
0103 physical sciences
Medical imaging
Magnetic nanoparticles
0210 nano-technology
Saturation (magnetic)
Subjects
Details
- ISSN :
- 17426596 and 17426588
- Volume :
- 793
- Database :
- OpenAIRE
- Journal :
- Journal of Physics: Conference Series
- Accession number :
- edsair.doi...........d3f33bb6a7e6fdf15bb8574e2a225f6d