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Magnetoacoustic sensing of magnetic nanoparticles.
Phys. Rev. Lett. 116:108103 (2016)
The interaction of magnetic nanoparticles and electromagnetic fields can be determined through electrical signal induction in coils due to magnetization. However, the direct measurement of instant electromagnetic energy absorption by magnetic nanoparticles, as it relates to particle characterization or magnetic hyperthermia studies, has not been possible so far. We introduce the theory of magnetoacoustics, predicting the existence of second harmonic pressure waves from magnetic nanoparticles due to energy absorption from continuously modulated alternating magnetic fields. We then describe the first magnetoacoustic system reported, based on a fiber-interferometer pressure detector, necessary for avoiding electric interference. The magnetoacoustic system confirmed the existence of previously unobserved second harmonic magnetoacoustic responses from solids, magnetic nanoparticles, and nanoparticle-loaded cells, exposed to continuous wave magnetic fields at different frequencies. We discuss how magnetoacoustic signals can be employed as a nanoparticle or magnetic field sensor for biomedical and environmental applications.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Iron-oxide Nanoparticles; Thermoacoustic Tomography; Fluid Hyperthermia; Remote-control; Field; Ultrasound; Delivery; Cells; Waves; Water
ISSN (print) / ISBN
0031-9007
e-ISSN
1079-7114
Journal
Physical Review Letters
Quellenangaben
Volume: 116,
Issue: 10,
Article Number: 108103
Publisher
American Physical Society (APS)
Publishing Place
College Pk
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Biological and Medical Imaging (IBMI)