Magnetic filaments for anisotropic composite polymers - Archive ouverte HAL Access content directly
Journal Articles Nanotechnology Year : 2020

Magnetic filaments for anisotropic composite polymers

Abstract

The use of contactless magnetic forces meets numerous needs in microelectromechanical systems (MEMS) or microfluidic devices. In this view, heterogeneous materials integrating magnetic nanostructures within a non-magnetic matrix such as polymer can produce local variations of magnetic field, at the sub-micrometer scale. Here we report on the synthesis of magnetic composites using electrospun nanofilaments and a polydimethylsiloxane (PDMS) matrix. Varying the precursor nature and heat treatment conditions, we obtained single phase filaments of Fe, FeNi, and MFe2O4 (M = Co, Fe, Ni). Thanks to a fine investigation of their structure and morphology, it was possible to measure from magnetically-soft (µ0HC ≤ 5 mT) to relatively hard (µ0HC up to 93 mT, MR/MS up to 0.5) behaviors. The common one-dimensional shape of these filaments leads to an anisotropic magnetic response. This can be exploited to achieve self-organization of the filaments in arrays within the non-magnetic matrix. We show the first step towards the development of magnetically anisotropic membranes of PDMS with 0.23 wt% Fe filaments. These composite materials are promising for implementing magnetic functions in microsystems while circumventing complex micro-fabrication steps.
Fichier principal
Vignette du fichier
Ourry2020.pdf (378.52 Ko) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-02919884 , version 1 (26-02-2021)

Licence

Identifiers

Cite

Laurence Ourry, Damien Le Roy, Samir Mekkaoui, Thierry Douillard, Anne-Laure Deman, et al.. Magnetic filaments for anisotropic composite polymers. Nanotechnology, 2020, 31 (39), pp.395503. ⟨10.1088/1361-6528/ab9b46⟩. ⟨hal-02919884⟩
80 View
259 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More