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Crystals 2017, 7(1), 22; doi:10.3390/cryst7010022

Synthesizing Iron Oxide Nanostructures: The Polyethylenenemine (PEI) Role

Biological and Environmental Sciences and Engineering (BESE) Division, Nanostructures & Biotech Laboratory (NABLA Lab), King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia
These authors contributed equally to this work.
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Academic Editor: Roberto Comparelli
Received: 23 November 2016 / Revised: 6 January 2017 / Accepted: 9 January 2017 / Published: 12 January 2017
(This article belongs to the Special Issue Colloidal Nanocrystals: Synthesis, Characterization and Application)
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Abstract

Controlled synthesis of anisotropic iron oxide nanoparticles is a challenge in the field of nanomaterial research that requires an extreme attention to detail. In particular, following up a previous work showcasing the synthesis of magnetite nanorods (NRs) using a two-step approach that made use of polyethylenenemine (PEI) as a capping ligand to synthesize intermediate β-FeOOH NRs, we studied the effect and influence of the capping ligand on the formation of β-FeOOH NRs. By comparing the results reported in the literature with those we obtained from syntheses performed (1) in the absence of PEI or (2) by using PEIs with different molecular weight, we showed how the choice of different PEIs determines the aspect ratio and the structural stability of the β-FeOOH NRs and how this affects the final products. For this purpose, a combination of XRD, HRTEM, and direct current superconducting quantum interference device (DC SQUID) magnetometry was used to identify the phases formed in the final products and study their morphostructural features and related magnetic behavior. View Full-Text
Keywords: magnetic nanoparticles; akaganeite; magnetite; hematite; polyethylenenemine; superparamagnetic behavior magnetic nanoparticles; akaganeite; magnetite; hematite; polyethylenenemine; superparamagnetic behavior
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lentijo Mozo, S.; Zuddas, E.; Casu, A.; Falqui, A. Synthesizing Iron Oxide Nanostructures: The Polyethylenenemine (PEI) Role. Crystals 2017, 7, 22.

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