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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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2015
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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. |
format | Online Article Text |
id | pubmed-4536209 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
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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