Multifunctional layered magnetic composites

A fabrication method of a multifunctional hybrid material is achieved by using the insoluble organic nacre matrix of the Haliotis laevigata shell infiltrated with gelatin as a confined reaction environment. Inside this organic scaffold magnetite nanoparticles (MNPs) are synthesized. The amount of MN...

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Main Authors:	Siglreitmeier, Maria, Wu, Baohu, Kollmann, Tina, Neubauer, Martin, Nagy, Gergely, Schwahn, Dietmar, Pipich, Vitaliy, Faivre, Damien, Zahn, Dirk, Fery, Andreas, Cölfen, Helmut
Format:	Online
Language:	English
Published:	Beilstein-Institut 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4311584/

id	pubmed-4311584
recordtype	oai_dc
spelling	pubmed-43115842015-02-10 Multifunctional layered magnetic composites Siglreitmeier, Maria Wu, Baohu Kollmann, Tina Neubauer, Martin Nagy, Gergely Schwahn, Dietmar Pipich, Vitaliy Faivre, Damien Zahn, Dirk Fery, Andreas Cölfen, Helmut Full Research Paper A fabrication method of a multifunctional hybrid material is achieved by using the insoluble organic nacre matrix of the Haliotis laevigata shell infiltrated with gelatin as a confined reaction environment. Inside this organic scaffold magnetite nanoparticles (MNPs) are synthesized. The amount of MNPs can be controlled through the synthesis protocol therefore mineral loadings starting from 15 wt % up to 65 wt % can be realized. The demineralized organic nacre matrix is characterized by small-angle and very-small-angle neutron scattering (SANS and VSANS) showing an unchanged organic matrix structure after demineralization compared to the original mineralized nacre reference. Light microscopy and confocal laser scanning microscopy studies of stained samples show the presence of insoluble proteins at the chitin surface but not between the chitin layers. Successful and homogeneous gelatin infiltration in between the chitin layers can be shown. The hybrid material is characterized by TEM and shows a layered structure filled with MNPs with a size of around 10 nm. Magnetic analysis of the material demonstrates superparamagnetic behavior as characteristic for the particle size. Simulation studies show the potential of collagen and chitin to act as nucleators, where there is a slight preference of chitin over collagen as a nucleator for magnetite. Colloidal-probe AFM measurements demonstrate that introduction of a ferrogel into the chitin matrix leads to a certain increase in the stiffness of the composite material. Beilstein-Institut 2015-01-12 /pmc/articles/PMC4311584/ /pubmed/25671158 http://dx.doi.org/10.3762/bjnano.6.13 Text en Copyright © 2015, Siglreitmeier et al; licensee Beilstein-Institut. http://www.beilstein-journals.org/bjnano This is an Open Access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (http://www.beilstein-journals.org/bjnano)
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Siglreitmeier, Maria Wu, Baohu Kollmann, Tina Neubauer, Martin Nagy, Gergely Schwahn, Dietmar Pipich, Vitaliy Faivre, Damien Zahn, Dirk Fery, Andreas Cölfen, Helmut
spellingShingle	Siglreitmeier, Maria Wu, Baohu Kollmann, Tina Neubauer, Martin Nagy, Gergely Schwahn, Dietmar Pipich, Vitaliy Faivre, Damien Zahn, Dirk Fery, Andreas Cölfen, Helmut Multifunctional layered magnetic composites
author_facet	Siglreitmeier, Maria Wu, Baohu Kollmann, Tina Neubauer, Martin Nagy, Gergely Schwahn, Dietmar Pipich, Vitaliy Faivre, Damien Zahn, Dirk Fery, Andreas Cölfen, Helmut
author_sort	Siglreitmeier, Maria
title	Multifunctional layered magnetic composites
title_short	Multifunctional layered magnetic composites
title_full	Multifunctional layered magnetic composites
title_fullStr	Multifunctional layered magnetic composites
title_full_unstemmed	Multifunctional layered magnetic composites
title_sort	multifunctional layered magnetic composites
description	A fabrication method of a multifunctional hybrid material is achieved by using the insoluble organic nacre matrix of the Haliotis laevigata shell infiltrated with gelatin as a confined reaction environment. Inside this organic scaffold magnetite nanoparticles (MNPs) are synthesized. The amount of MNPs can be controlled through the synthesis protocol therefore mineral loadings starting from 15 wt % up to 65 wt % can be realized. The demineralized organic nacre matrix is characterized by small-angle and very-small-angle neutron scattering (SANS and VSANS) showing an unchanged organic matrix structure after demineralization compared to the original mineralized nacre reference. Light microscopy and confocal laser scanning microscopy studies of stained samples show the presence of insoluble proteins at the chitin surface but not between the chitin layers. Successful and homogeneous gelatin infiltration in between the chitin layers can be shown. The hybrid material is characterized by TEM and shows a layered structure filled with MNPs with a size of around 10 nm. Magnetic analysis of the material demonstrates superparamagnetic behavior as characteristic for the particle size. Simulation studies show the potential of collagen and chitin to act as nucleators, where there is a slight preference of chitin over collagen as a nucleator for magnetite. Colloidal-probe AFM measurements demonstrate that introduction of a ferrogel into the chitin matrix leads to a certain increase in the stiffness of the composite material.
publisher	Beilstein-Institut
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4311584/
_version_	1613182462847877120

Multifunctional layered magnetic composites

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