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Preparation of colored hollow particles for dual-color electrophoresis display

Yuan Zhuang,Yanhui Liu,Shirong Wang,Xianggao Li,Shuxian Meng

Electrophoretic particles enable image display in electrophoretic displays by migrating under an electric field. In this study, white hollow TiO 2 was synthesized via an improved template method, and colored hollow particles were obtained through pigment adsorption. The TiO 2 exhibited a charge of +78.08 mV and 92 % reflectivity, making it suitable for electronic paper applications. Magenta, yellow, and cyan hollow particles, all negatively charged with non-overlapping charge values, were formulated into dual-color electrophoretic suspensions. Under alternating voltage, color changes were achieved in magenta/yellow and yellow/cyan systems. This study offers new insights for dual-color and multi-color electrophoretic displays.