Fig. 1: The effect of the magnetic field on the CE between the DI water and different solids.
From: Spin-selected electron transfer in liquid–solid contact electrification
a The experimental setup and magnetization of the O2 molecules and ferrimagnetic samples. b The surface potential of the Fe3O4 sample in the DI water (O2 concentration, 2.5 mg L−1) with the magnetic field (0.5 T) switched off and on. The effect of (c) upward, (d) downward, (e) rightward and (f) leftward magnetic fields on the charge transfer between the different solid samples and the DI water (O2 concentration, 2.5 mg L−1). B denotes the magnetic field; I is the current and ∆V denotes the change of surface potential. The shaded areas around the data point indicate error bars. (Error bar are defined as s. d.) Source data are provided as a Source Data file.
