Magnetoacoustic Sensing of Magnetic Nanoparticles
| Autor: | Stephan Kellnberger, Ahne Myklatun, Amir Rosenthal, George D. Sergiadis, Gil G. Westmeyer, Vasilis Ntziachristos |
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| Rok vydání: | 2015 |
| Předmět: |
Electromagnetic field
Materials science Condensed matter physics Physics::Medical Physics General Physics and Astronomy 02 engineering and technology Acoustics Biosensing Techniques Models Theoretical 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Electromagnetic radiation 0104 chemical sciences Magnetic field Magnetization Magnetics Magnetic hyperthermia Nuclear magnetic resonance Continuous wave Magnetic nanoparticles Thermodynamics 0210 nano-technology Absorption (electromagnetic radiation) Magnetite Nanoparticles |
| Zdroj: | Europe PubMed Central Phys. Rev. Lett. 116:108103 (2016) |
| ISSN: | 1079-7114 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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