INQUISUR   21779
INSTITUTO DE QUIMICA DEL SUR
Unidad Ejecutora - UE
artículos
Título:
Experimental and mechanistic issues on the preparation of iron oxide nanoparticles stabilized
Autor/es:
PAULA NICOLÁS; MARTÍN SALETA; HORACIO TROIANI; ROBERTO ZYSLER; VERÓNICA LASSALLE; MARÍA LUJÁN FERREIRA
Revista:
ACTA BIOMATERIALIA
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2012 p. 4754 - 4762
ISSN:
1742-7061
Resumen:
Abstract
Nanoparticles (NPs) with magnetic properties based on magnetite (Fe3O4, MAG)
modified with oleic acid (OA), chitosan (CS) and bovine serum albumin (BSA), have
been prepared. A versatile method of synthesis was employed, involving two steps:
firstly co-precipitation of MAG ; and second nanoprecipitation of macromolecules on
as-formed MAG NPs. Experimental variables have been explored to determine the set
of conditions that ensure suitable properties of NPs in terms of their size, functionality
and magnetic properties. It was found that the presence of OA in Fe+2/Fe+3 solutions
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
modified with oleic acid (OA), chitosan (CS) and bovine serum albumin (BSA), have
been prepared. A versatile method of synthesis was employed, involving two steps:
firstly co-precipitation of MAG ; and second nanoprecipitation of macromolecules on
as-formed MAG NPs. Experimental variables have been explored to determine the set
of conditions that ensure suitable properties of NPs in terms of their size, functionality
and magnetic properties. It was found that the presence of OA in Fe+2/Fe+3 solutions
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
modified with oleic acid (OA), chitosan (CS) and bovine serum albumin (BSA), have
been prepared. A versatile method of synthesis was employed, involving two steps:
firstly co-precipitation of MAG ; and second nanoprecipitation of macromolecules on
as-formed MAG NPs. Experimental variables have been explored to determine the set
of conditions that ensure suitable properties of NPs in terms of their size, functionality
and magnetic properties. It was found that the presence of OA in Fe+2/Fe+3 solutions
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
modified with oleic acid (OA), chitosan (CS) and bovine serum albumin (BSA), have
been prepared. A versatile method of synthesis was employed, involving two steps:
firstly co-precipitation of MAG ; and second nanoprecipitation of macromolecules on
as-formed MAG NPs. Experimental variables have been explored to determine the set
of conditions that ensure suitable properties of NPs in terms of their size, functionality
and magnetic properties. It was found that the presence of OA in Fe+2/Fe+3 solutions
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
modified with oleic acid (OA), chitosan (CS) and bovine serum albumin (BSA), have
been prepared. A versatile method of synthesis was employed, involving two steps:
firstly co-precipitation of MAG ; and second nanoprecipitation of macromolecules on
as-formed MAG NPs. Experimental variables have been explored to determine the set
of conditions that ensure suitable properties of NPs in terms of their size, functionality
and magnetic properties. It was found that the presence of OA in Fe+2/Fe+3 solutions
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
3O4, MAG)
modified with oleic acid (OA), chitosan (CS) and bovine serum albumin (BSA), have
been prepared. A versatile method of synthesis was employed, involving two steps:
firstly co-precipitation of MAG ; and second nanoprecipitation of macromolecules on
as-formed MAG NPs. Experimental variables have been explored to determine the set
of conditions that ensure suitable properties of NPs in terms of their size, functionality
and magnetic properties. It was found that the presence of OA in Fe+2/Fe+3 solutions
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.
+2/Fe+3 solutions
yields magnetite NPs with lower aggregation levels while increasing initial amounts of
OA may change the capability of NPs to disperse in aqueous or organic media by
modifying the stabilization mechanism. Incorporation of CS was verified through FTIR
techniques. This biopolymer stabilizes NPs by electrostatic repulsions leading to stable
ferrofluids and minimal fraction of recoverable solid NPs. BSA was successfully added
to NPs formulations increasing their functionality and probably their biocompatibility.
In this case also stable ferrofluids were obtained, where BSA acts as a polyelectrolyte.
From the proposed methodology it is possible to achieve a wide range of NPs
magnetically active intended for several applications. The required properties may be
obtained by varying experimental conditions.