Eco-friendly plasticized poly(vinyl chloride)–acetyl tributyl citrate gels for varifocal lens

We fabricated an ecofriendly, electroactive, reconfigurable and varifocal PVC–ATBC (ePVC) gel lens. The curvature of the hemispherical plano-convex ePVC gel lens changes with the input voltage. Its focal length increased from 5 to 15 mm upon increasing from 0 to 500 V.