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Design and validation of magnetic particle spectrometer for characterization of magnetic nanoparticle relaxation dynamics

The design and validation of a magnetic particle spectrometer (MPS) system used to study the linear and nonlinear behavior of magnetic nanoparticle suspensions is presented. The MPS characterizes the suspension dynamic response, both due to relaxation and saturation effects, which depends on the mag...

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Autores principales: Garraud, Nicolas, Dhavalikar, Rohan, Maldonado-Camargo, Lorena, Arnold, David P., Rinaldi, Carlos
Formato: Online Artículo Texto
Lenguaje:English
Publicado: AIP Publishing LLC 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5336471/
https://www.ncbi.nlm.nih.gov/pubmed/28344854
http://dx.doi.org/10.1063/1.4978003
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author Garraud, Nicolas
Dhavalikar, Rohan
Maldonado-Camargo, Lorena
Arnold, David P.
Rinaldi, Carlos
author_facet Garraud, Nicolas
Dhavalikar, Rohan
Maldonado-Camargo, Lorena
Arnold, David P.
Rinaldi, Carlos
author_sort Garraud, Nicolas
collection PubMed
description The design and validation of a magnetic particle spectrometer (MPS) system used to study the linear and nonlinear behavior of magnetic nanoparticle suspensions is presented. The MPS characterizes the suspension dynamic response, both due to relaxation and saturation effects, which depends on the magnetic particles and their environment. The system applies sinusoidal excitation magnetic fields varying in amplitude and frequency and can be configured for linear measurements (1 mT at up to 120 kHz) and nonlinear measurements (50 mT at up to 24 kHz). Time-resolved data acquisition at up to 4 MS/s combined with hardware and software-based signal processing allows for wide-band measurements up to 50 harmonics in nonlinear mode. By cross-calibrating the instrument with a known sample, the instantaneous sample magnetization can be quantitatively reconstructed. Validation of the two MPS modes are performed for iron oxide and cobalt ferrite suspensions, exhibiting Néel and Brownian relaxation, respectively.
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spelling pubmed-53364712017-03-24 Design and validation of magnetic particle spectrometer for characterization of magnetic nanoparticle relaxation dynamics Garraud, Nicolas Dhavalikar, Rohan Maldonado-Camargo, Lorena Arnold, David P. Rinaldi, Carlos AIP Adv THE 61ST MMM CONFERENCE PAPERS The design and validation of a magnetic particle spectrometer (MPS) system used to study the linear and nonlinear behavior of magnetic nanoparticle suspensions is presented. The MPS characterizes the suspension dynamic response, both due to relaxation and saturation effects, which depends on the magnetic particles and their environment. The system applies sinusoidal excitation magnetic fields varying in amplitude and frequency and can be configured for linear measurements (1 mT at up to 120 kHz) and nonlinear measurements (50 mT at up to 24 kHz). Time-resolved data acquisition at up to 4 MS/s combined with hardware and software-based signal processing allows for wide-band measurements up to 50 harmonics in nonlinear mode. By cross-calibrating the instrument with a known sample, the instantaneous sample magnetization can be quantitatively reconstructed. Validation of the two MPS modes are performed for iron oxide and cobalt ferrite suspensions, exhibiting Néel and Brownian relaxation, respectively. AIP Publishing LLC 2017-03-02 /pmc/articles/PMC5336471/ /pubmed/28344854 http://dx.doi.org/10.1063/1.4978003 Text en © 2017 Author(s). 2158-3226/2017/7(5)/056730/6/$0.00 All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle THE 61ST MMM CONFERENCE PAPERS
Garraud, Nicolas
Dhavalikar, Rohan
Maldonado-Camargo, Lorena
Arnold, David P.
Rinaldi, Carlos
Design and validation of magnetic particle spectrometer for characterization of magnetic nanoparticle relaxation dynamics
title Design and validation of magnetic particle spectrometer for characterization of magnetic nanoparticle relaxation dynamics
title_full Design and validation of magnetic particle spectrometer for characterization of magnetic nanoparticle relaxation dynamics
title_fullStr Design and validation of magnetic particle spectrometer for characterization of magnetic nanoparticle relaxation dynamics
title_full_unstemmed Design and validation of magnetic particle spectrometer for characterization of magnetic nanoparticle relaxation dynamics
title_short Design and validation of magnetic particle spectrometer for characterization of magnetic nanoparticle relaxation dynamics
title_sort design and validation of magnetic particle spectrometer for characterization of magnetic nanoparticle relaxation dynamics
topic THE 61ST MMM CONFERENCE PAPERS
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5336471/
https://www.ncbi.nlm.nih.gov/pubmed/28344854
http://dx.doi.org/10.1063/1.4978003
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