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Materials 2016, 9(10), 826; doi:10.3390/ma9100826

Functionalization of Fe3O4 NPs by Silanization: Use of Amine (APTES) and Thiol (MPTMS) Silanes and Their Physical Characterization

1
Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
2
Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova and CNR-SPIN Genova Unit, Via Dodecaneso 31, 16146 Genova, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Andrea P. Reverberi
Received: 29 July 2016 / Revised: 29 September 2016 / Accepted: 2 October 2016 / Published: 12 October 2016
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Abstract

In this paper the results concerning the synthesis of magnetite (Fe3O4) nanoparticles (NPs), their functionalization using silane derivatives, such as (3-Aminopropyl)triethoxysilane (APTES) and (3-mercaptopropyl)trimethoxysilane (MPTMS), and their exhaustive morphological and physical characterization by field emission scanning electron microscopy (FE-SEM) with energy dispersion X-ray spectrometer (EDX) analysis, AC magnetic susceptibility, UV-VIS and IR spectroscopy, and thermogravimetric (TGA) analyses are reported. Two different paths were adopted to achieve the desired functionalization: (1) the direct reaction between the functionalized organo-silane molecule and the surface of the magnetite nanoparticle; and (2) the use of an intermediate silica coating. Finally, the occurrence of both the functionalization with amino and thiol groups has been demonstrated by the reaction with ninhydrin and the capture of Au NPs, respectively. View Full-Text
Keywords: magnetite nanoparticles; silica shell; AC magnetic susceptibility; functionalized organo silane molecules magnetite nanoparticles; silica shell; AC magnetic susceptibility; functionalized organo silane molecules
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MDPI and ACS Style

Villa, S.; Riani, P.; Locardi, F.; Canepa, F. Functionalization of Fe3O4 NPs by Silanization: Use of Amine (APTES) and Thiol (MPTMS) Silanes and Their Physical Characterization. Materials 2016, 9, 826.

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