A benchtop induction-based AC magnetometer for a fast characterization of magnetic nanoparticles

In this study, we report a development of a benchtop induction-based AC magnetometer to realize a simple, wideband, and sensitive AC magnetometer for bio-sensing applications and characterization of magnetic nanoparticles (MNPs). We investigate the inductance and parasitic capacitance of six differe...

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Main Authors: Mohd Mawardi, Saari, Mohd Herwan, Sulaiman, Hamzah, Ahmad, Nurul Akmal, Che Lah, Sakai, Kenji, Kiwa, Toshihiko, Tsukada, Keiji
Format: Article
Language:English
English
Published: Institute of Physics 2022
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Online Access:http://umpir.ump.edu.my/id/eprint/42682/1/A%20benchtop%20induction-based%20AC%20magnetometer.pdf
http://umpir.ump.edu.my/id/eprint/42682/2/A%20benchtop%20induction-based%20AC%20magnetometer%20for%20a%20fast%20characterization%20of%20magnetic%20nanoparticles_ABS.pdf
http://umpir.ump.edu.my/id/eprint/42682/
https://doi.org/10.1088/2631-8695/ac78c8
https://doi.org/10.1088/2631-8695/ac78c8
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spelling my.ump.umpir.426822025-01-07T03:50:52Z http://umpir.ump.edu.my/id/eprint/42682/ A benchtop induction-based AC magnetometer for a fast characterization of magnetic nanoparticles Mohd Mawardi, Saari Mohd Herwan, Sulaiman Hamzah, Ahmad Nurul Akmal, Che Lah Sakai, Kenji Kiwa, Toshihiko Tsukada, Keiji T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering TS Manufactures In this study, we report a development of a benchtop induction-based AC magnetometer to realize a simple, wideband, and sensitive AC magnetometer for bio-sensing applications and characterization of magnetic nanoparticles (MNPs). We investigate the inductance and parasitic capacitance of six different pickup coil geometries and compare their sensitivity and usable frequency range. In the pickup coil design, the number of turns and coil section separation are varied from 200 to 400 turns, and 1 to 4 sections, respectively. We find that the usable frequency range is greatly affected by the pickup coil's inductance due to the self-resonance phenomena compared to their parasitic capacitance. A low noise instrument amplifier circuit (AD8429, Analog Devices, USA) was integrated and fabricated on a printed circuit board to amplify the weak signal from the pickup coil. We also implement a generalized Goertzel algorithm to achieve fast signal amplitude and phase extractions at a frequency. The developed magnetometer shows a sensitivity of 10-8 Am2/Hz at 6 Hz and a frequency range of up to 158 kHz. Using the developed AC magnetometer, we demonstrate the viscosity effect on the frequency response of thermally blocked, single-core nanoparticles (SHP30, Ocean Nanotech, USA) in glycerol solutions. The excitation frequency is swept from 5 Hz to 158 kHz at a field amplitude of 0.55 mTpp within the acquisition time of 5 min (51 points). As a result, the viscosity change is confirmed by the peak shifting in the imaginary magnetization curve towards lower frequency values when the wt/V% of the glycerol solution is increased. The hydrodynamic size and the average anisotropy energy ratio σ are estimated to be 60.6 nm and 25, respectively, from the complex AC magnetization. It can be expected that the developed AC magnetometer can be a valuable tool in providing a fast and reliable assessment of MNPs for bio-sensing applications. Institute of Physics 2022-06 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/42682/1/A%20benchtop%20induction-based%20AC%20magnetometer.pdf pdf en http://umpir.ump.edu.my/id/eprint/42682/2/A%20benchtop%20induction-based%20AC%20magnetometer%20for%20a%20fast%20characterization%20of%20magnetic%20nanoparticles_ABS.pdf Mohd Mawardi, Saari and Mohd Herwan, Sulaiman and Hamzah, Ahmad and Nurul Akmal, Che Lah and Sakai, Kenji and Kiwa, Toshihiko and Tsukada, Keiji (2022) A benchtop induction-based AC magnetometer for a fast characterization of magnetic nanoparticles. Engineering Research Express, 4 (025047). pp. 1-9. ISSN 2631-8695. (Published) https://doi.org/10.1088/2631-8695/ac78c8 https://doi.org/10.1088/2631-8695/ac78c8
institution Universiti Malaysia Pahang Al-Sultan Abdullah
building UMPSA Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang Al-Sultan Abdullah
content_source UMPSA Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
English
topic T Technology (General)
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
TK Electrical engineering. Electronics Nuclear engineering
TS Manufactures
spellingShingle T Technology (General)
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
TK Electrical engineering. Electronics Nuclear engineering
TS Manufactures
Mohd Mawardi, Saari
Mohd Herwan, Sulaiman
Hamzah, Ahmad
Nurul Akmal, Che Lah
Sakai, Kenji
Kiwa, Toshihiko
Tsukada, Keiji
A benchtop induction-based AC magnetometer for a fast characterization of magnetic nanoparticles
description In this study, we report a development of a benchtop induction-based AC magnetometer to realize a simple, wideband, and sensitive AC magnetometer for bio-sensing applications and characterization of magnetic nanoparticles (MNPs). We investigate the inductance and parasitic capacitance of six different pickup coil geometries and compare their sensitivity and usable frequency range. In the pickup coil design, the number of turns and coil section separation are varied from 200 to 400 turns, and 1 to 4 sections, respectively. We find that the usable frequency range is greatly affected by the pickup coil's inductance due to the self-resonance phenomena compared to their parasitic capacitance. A low noise instrument amplifier circuit (AD8429, Analog Devices, USA) was integrated and fabricated on a printed circuit board to amplify the weak signal from the pickup coil. We also implement a generalized Goertzel algorithm to achieve fast signal amplitude and phase extractions at a frequency. The developed magnetometer shows a sensitivity of 10-8 Am2/Hz at 6 Hz and a frequency range of up to 158 kHz. Using the developed AC magnetometer, we demonstrate the viscosity effect on the frequency response of thermally blocked, single-core nanoparticles (SHP30, Ocean Nanotech, USA) in glycerol solutions. The excitation frequency is swept from 5 Hz to 158 kHz at a field amplitude of 0.55 mTpp within the acquisition time of 5 min (51 points). As a result, the viscosity change is confirmed by the peak shifting in the imaginary magnetization curve towards lower frequency values when the wt/V% of the glycerol solution is increased. The hydrodynamic size and the average anisotropy energy ratio σ are estimated to be 60.6 nm and 25, respectively, from the complex AC magnetization. It can be expected that the developed AC magnetometer can be a valuable tool in providing a fast and reliable assessment of MNPs for bio-sensing applications.
format Article
author Mohd Mawardi, Saari
Mohd Herwan, Sulaiman
Hamzah, Ahmad
Nurul Akmal, Che Lah
Sakai, Kenji
Kiwa, Toshihiko
Tsukada, Keiji
author_facet Mohd Mawardi, Saari
Mohd Herwan, Sulaiman
Hamzah, Ahmad
Nurul Akmal, Che Lah
Sakai, Kenji
Kiwa, Toshihiko
Tsukada, Keiji
author_sort Mohd Mawardi, Saari
title A benchtop induction-based AC magnetometer for a fast characterization of magnetic nanoparticles
title_short A benchtop induction-based AC magnetometer for a fast characterization of magnetic nanoparticles
title_full A benchtop induction-based AC magnetometer for a fast characterization of magnetic nanoparticles
title_fullStr A benchtop induction-based AC magnetometer for a fast characterization of magnetic nanoparticles
title_full_unstemmed A benchtop induction-based AC magnetometer for a fast characterization of magnetic nanoparticles
title_sort benchtop induction-based ac magnetometer for a fast characterization of magnetic nanoparticles
publisher Institute of Physics
publishDate 2022
url http://umpir.ump.edu.my/id/eprint/42682/1/A%20benchtop%20induction-based%20AC%20magnetometer.pdf
http://umpir.ump.edu.my/id/eprint/42682/2/A%20benchtop%20induction-based%20AC%20magnetometer%20for%20a%20fast%20characterization%20of%20magnetic%20nanoparticles_ABS.pdf
http://umpir.ump.edu.my/id/eprint/42682/
https://doi.org/10.1088/2631-8695/ac78c8
https://doi.org/10.1088/2631-8695/ac78c8
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score 13.232414