TY - JOUR
T1 - Harmonics distribution of iron oxide nanoparticles solutions under diamagnetic background
AU - Saari, Mohd Mawardi
AU - Che Lah, Nurul Akmal
AU - Sakai, Kenji
AU - Kiwa, Toshihiko
AU - Tsukada, Keiji
N1 - Funding Information:
This work was supported by Ministry of Higher Education of Malaysia under grant number of RDU 160115, Research Management Center of Universiti Malaysia Pahang under grant number of RDU 170377 and the “Strategic Promotion of Innovative R&D” of the Japan Science and Technology Agency (JST).
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/4/15
Y1 - 2018/4/15
N2 - The static and dynamic magnetizations of low concentrated multi-core iron oxide nanoparticles solutions were investigated by a specially developed high-Tc Superconducting Quantum Interference Device (SQUID) magnetometer. The size distribution of iron oxide cores was determined from static magnetization curves concerning different concentrations. The simulated harmonics distribution was compared to the experimental results. Effect of the diamagnetic background from carrier liquid to harmonics distribution was investigated with respect to different intensity and position of peaks in the magnetic moment distribution using a numerical simulation. It was found that the diamagnetic background from carrier liquid of iron oxide nanoparticles affected the harmonics distribution as their concentration decreased and depending on their magnetic moment distribution. The first harmonic component was susceptible to the diamagnetic contribution of carrier liquid when the concentration was lower than 24 μg/ml. The second and third harmonics were affected when the peak position of magnetic moment distribution was smaller than m = 10−19 Am2 and the concentration was 10 ng/ml. A highly sensitive detection up to sub-nanogram of iron oxide nanoparticles in solutions can be achieved by utilizing second and third harmonic components.
AB - The static and dynamic magnetizations of low concentrated multi-core iron oxide nanoparticles solutions were investigated by a specially developed high-Tc Superconducting Quantum Interference Device (SQUID) magnetometer. The size distribution of iron oxide cores was determined from static magnetization curves concerning different concentrations. The simulated harmonics distribution was compared to the experimental results. Effect of the diamagnetic background from carrier liquid to harmonics distribution was investigated with respect to different intensity and position of peaks in the magnetic moment distribution using a numerical simulation. It was found that the diamagnetic background from carrier liquid of iron oxide nanoparticles affected the harmonics distribution as their concentration decreased and depending on their magnetic moment distribution. The first harmonic component was susceptible to the diamagnetic contribution of carrier liquid when the concentration was lower than 24 μg/ml. The second and third harmonics were affected when the peak position of magnetic moment distribution was smaller than m = 10−19 Am2 and the concentration was 10 ng/ml. A highly sensitive detection up to sub-nanogram of iron oxide nanoparticles in solutions can be achieved by utilizing second and third harmonic components.
KW - Diamagnetism
KW - Harmonics generation
KW - Magnetic nanoparticles
KW - SQUID magnetometer
KW - Water
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U2 - 10.1016/j.jmmm.2017.12.054
DO - 10.1016/j.jmmm.2017.12.054
M3 - Article
AN - SCOPUS:85038818505
SN - 0304-8853
VL - 452
SP - 145
EP - 152
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
ER -