Abstract
Usually, positive magnetoresistance (PMR) is observed in graphene foam (GF) under all temperature and magnetic field range. Herein, large negative magnetoresistance is observed under a temperature range 300–200 K which switches to PMR under a temperature range 200–5 K in graphene foam (GF)-Ecoflex® specimen. The GF-Ecoflex® shows NMR in highly crosslinked specimen, while lightly crosslinked shows PMR at room temperature. This indicates that the sign of magnetoresistance can be controlled by controlling viscoelasticity of Ecoflex® in GF-Ecoflex® specimens, which is very useful for wearable magnetoelectronics.
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