In some embodiments, an electroactive device includes a first electrode, a second electrode, and an electroactive element disposed between the first electrode and the second electrode. The electroactive element may include a plurality of voids distributed within the electroactive element. The electroactive device may have a non-uniform electroactive response based at least in part on a non-uniform distribution of voids within the electroactive element. The non-uniform electroactive response may include a non-uniform sensor response or a non-uniform actuation response. Various other methods, systems, apparatuses, and materials are also disclosed.