title: Synthesis of black magnetic electrophoretic particles for magnetic-electric dual-driven electronic paper.
abstract: The application of electronic paper (e-paper) is now propelling the development of the multifunctional e-paper products. There is an extraordinary diversity of basic and applied research in pursuit of the novel e-paper. Here, we report the first achievement of a magnetic-electric dual-driven e-paper, using black magnetic electrophoretic particles (BMEPs). BMEPs are synthesized via a facile, green, low-cost, one-step method. By adjusting the reaction conditions, the density, surface, and magnetic properties of the BMEPs are optimized for e-paper display. Finally, the e-paper display is successfully assembled using dispersion of the BMEPs in a mixed dielectric solvent with white particles as contrast. Thanks to the magnetic properties and a positively charged surface, the BMEPs can be driven by both electric and magnetic fields. The prototype display is fabricated whose switch is achieved by the application of either a bias voltage of 10 V or a magnetic bias. The as-prepared magnetic-electric dual-driven device could have many promising applications in the field of anticounterfeiting labels for secure identification documents.
authors.affiliation: Laboratory of Controllable Preparation and Application of Nanomaterials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: Xianwei
authors.initials: X
authors.lastname: Meng
authors.forename: Li
authors.initials: L
authors.lastname: Qiang
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Su
authors.forename: Jun
authors.initials: J
authors.lastname: Ren
authors.forename: Fangqiong
authors.initials: F
authors.lastname: Tang