Long-term effects of repeated electric-field actuation

Investigate the cumulative surface-charge accumulation, lubricant redistribution, and interfacial degradation that may occur during long-term repeated actuation of electric-field-driven droplets on lubricant-infused micropillar surfaces.

Background

The paper demonstrates periodic and long-distance droplet transport using electrode-switching protocols involving no more than three switching events. Under these limited demonstrations, cumulative surface-charge accumulation, lubricant redistribution, and interfacial degradation are treated as negligible.

The authors explicitly identify the behavior of these effects during long-term repeated actuation as unresolved. Understanding them is necessary for assessing the durability and reliability of programmable electric-field-driven droplet manipulation in practical devices.