Surface charge engineering for structural control of colloidal silica rod-decorated silica particles and their flexible integration into magnetic core–multishell structures
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This study investigates how surface modification and resulting surface charge of colloidal silica seeds affect silica rod growth in an emulsion droplet-based process. By modifying seed surfaces with cationic substances and aging with PVP, significant PVP adsorption occurs due to electrostatic interactions. This promotes emulsion droplet anchoring, initiating silica rod growth and yielding silica rod-decorated particles. Varying cationic modifiers further alters surface properties, influencing final product morphology and yield. This approach demonstrates its versatility by generating magnetic core-multishell particles and highlights the important role of surface charge engineering in controlling the structure and morphology of silica rod-decorated silica particles