Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 357, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2023.114370
Keywords
Magnetic nanoparticles (MNPs); AC magnetic field; Highly sensitive detection; Transmittance; magneto -optical gate effect
Ask authors/readers for more resources
In this paper, a new concept of using magnetic nanoparticles as magneto-optical markers is proposed and a magneto-optical gate effect is explored. A high-sensitivity detection method for magnetic nanoparticles is developed based on this principle.
In this paper, a new concept of magnetic nanoparticles (MNPs) as magneto-optical markers is proposed, and a magneto-optical gate effect is explored. High-sensitivity detection of MNPs was developed based on this principle. Under irradiation from monochromatic light with a wavelength much larger than the size of a given MNP, Rayleigh scattering occurs on the MNP surface. The MNPs anisotropic and orientate themselves into chains, meaning that the Rayleigh scattering now decreases under magnetic field excitation. After applying an AC magnetic field with a frequency of f, the transmitted light passing through the MNPs reagent generates an AC signal with a frequency of 2f. Moreover, the AC signal disappears after removal of the magnetic field. This creates a magneto-optical gate effect. The instantaneous and highly sensitive detection of magnetooptical markers with a concentration of 0.2 mu g/mL and an effective optical path length of 10 mu m is realized based on this magnetooptical gate effect.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available