a biological tissue interface system is disclosed which employs an electroactive polymer actuator to pivot a tissue interface portion which may be adapted to engage with neural tissue . the system comprises a base portion , an articulating portion having a proximal end attached to the base portion and a free distal end , and an actuator operably coupled to the articulating portion , driven by a conjugated polymer that changes dimension in response to an electric charge . the polymer applies a force to pivot the articulating portion , relative to the base portion , to engage tissue at the distal tissue interface . in neural interface applications , the articulating portion may comprise at least one conducting surface for neural communications , such as a microelectrode or a polymer .