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Magnetic Clustering Effect during the Association of Biofunctionalized Magnetic Nanoparticles with Biomarkers

We report herein an investigation into dynamic magnetic clustering that occurs during immunoassays as biofunctionalized magnetic nanoparticles (BMNs) become associated with biotargets. We measure the dynamic effective relaxation time τ (eff)(t) and use scanning electron microscopy (SEM) and transmis...

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Autores principales: Chen, Kuen-Lin, Chen, Jean-Hong, Liao, Su-Hsien, Chieh, Jen-Je, Horng, Herng-Er, Wang, Li-Min, Yang, Hong-Chang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4536209/
https://www.ncbi.nlm.nih.gov/pubmed/26270967
http://dx.doi.org/10.1371/journal.pone.0135290
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author Chen, Kuen-Lin
Chen, Jean-Hong
Liao, Su-Hsien
Chieh, Jen-Je
Horng, Herng-Er
Wang, Li-Min
Yang, Hong-Chang
author_facet Chen, Kuen-Lin
Chen, Jean-Hong
Liao, Su-Hsien
Chieh, Jen-Je
Horng, Herng-Er
Wang, Li-Min
Yang, Hong-Chang
author_sort Chen, Kuen-Lin
collection PubMed
description We report herein an investigation into dynamic magnetic clustering that occurs during immunoassays as biofunctionalized magnetic nanoparticles (BMNs) become associated with biotargets. We measure the dynamic effective relaxation time τ (eff)(t) and use scanning electron microscopy (SEM) and transmission electron microscopy (TEM) to investigate the C-reactive protein (CRP) as it associates with the BMN Fe(3)O(4)-antiCRP to form the magnetic cluster Fe(3)O(4)-antiCRP-CRP. The results indicate that τ (eff)(t) increases with increasing association time. In addition, the ration Δτ (eff)/τ (0) as a function of CRP concentration follows a characteristic logistic function, which provides a basis for estimating the quantity of biomolecules with a detection sensitivity close to 0.1 ppm. After the association, SEM and TEM images show that CRP and Fe(3)O(4)-antiCRP conjugate to form Fe(3)O(4)-antiCRP-CRP clusters hundreds of nanometers in size. The SEM and TEM images provide direct evidence of the formation of magnetic clustering.
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spelling pubmed-45362092015-08-20 Magnetic Clustering Effect during the Association of Biofunctionalized Magnetic Nanoparticles with Biomarkers Chen, Kuen-Lin Chen, Jean-Hong Liao, Su-Hsien Chieh, Jen-Je Horng, Herng-Er Wang, Li-Min Yang, Hong-Chang PLoS One Research Article We report herein an investigation into dynamic magnetic clustering that occurs during immunoassays as biofunctionalized magnetic nanoparticles (BMNs) become associated with biotargets. We measure the dynamic effective relaxation time τ (eff)(t) and use scanning electron microscopy (SEM) and transmission electron microscopy (TEM) to investigate the C-reactive protein (CRP) as it associates with the BMN Fe(3)O(4)-antiCRP to form the magnetic cluster Fe(3)O(4)-antiCRP-CRP. The results indicate that τ (eff)(t) increases with increasing association time. In addition, the ration Δτ (eff)/τ (0) as a function of CRP concentration follows a characteristic logistic function, which provides a basis for estimating the quantity of biomolecules with a detection sensitivity close to 0.1 ppm. After the association, SEM and TEM images show that CRP and Fe(3)O(4)-antiCRP conjugate to form Fe(3)O(4)-antiCRP-CRP clusters hundreds of nanometers in size. The SEM and TEM images provide direct evidence of the formation of magnetic clustering. Public Library of Science 2015-08-13 /pmc/articles/PMC4536209/ /pubmed/26270967 http://dx.doi.org/10.1371/journal.pone.0135290 Text en © 2015 Chen et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Chen, Kuen-Lin
Chen, Jean-Hong
Liao, Su-Hsien
Chieh, Jen-Je
Horng, Herng-Er
Wang, Li-Min
Yang, Hong-Chang
Magnetic Clustering Effect during the Association of Biofunctionalized Magnetic Nanoparticles with Biomarkers
title Magnetic Clustering Effect during the Association of Biofunctionalized Magnetic Nanoparticles with Biomarkers
title_full Magnetic Clustering Effect during the Association of Biofunctionalized Magnetic Nanoparticles with Biomarkers
title_fullStr Magnetic Clustering Effect during the Association of Biofunctionalized Magnetic Nanoparticles with Biomarkers
title_full_unstemmed Magnetic Clustering Effect during the Association of Biofunctionalized Magnetic Nanoparticles with Biomarkers
title_short Magnetic Clustering Effect during the Association of Biofunctionalized Magnetic Nanoparticles with Biomarkers
title_sort magnetic clustering effect during the association of biofunctionalized magnetic nanoparticles with biomarkers
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4536209/
https://www.ncbi.nlm.nih.gov/pubmed/26270967
http://dx.doi.org/10.1371/journal.pone.0135290
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