Magnetoacoustic Sensing of Magnetic Nanoparticles

Kellnberger S, Rosenthal A, Myklatun A, Westmeyer GG, Sergiadis G, Ntziachristos V (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Physical Review Letters American Physical Society

Book Volume: 116

Article Number: 108103

Journal Issue: 10

DOI: 10.1103/PhysRevLett.116.108103

Abstract

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.

Involved external institutions

Harvard University US United States (USA) (US) Technische Universität München (TUM) DE Germany (DE) Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt (HMGU) / Helmholtz Munich DE Germany (DE) Aristotle University of Thessaloniki GR Greece (GR)

How to cite

APA:

Kellnberger, S., Rosenthal, A., Myklatun, A., Westmeyer, G.G., Sergiadis, G., & Ntziachristos, V. (2016). Magnetoacoustic Sensing of Magnetic Nanoparticles. Physical Review Letters, 116(10). https://doi.org/10.1103/PhysRevLett.116.108103

MLA:

Kellnberger, Stephan, et al. "Magnetoacoustic Sensing of Magnetic Nanoparticles." Physical Review Letters 116.10 (2016).

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