RT info:eu-repo/semantics/article T1 Actuators Displaying Unidirectional Movement A1 Nandi, Mridula A1 Maiti, Binoy A1 Díaz Díaz, David K1 actuators K1 hydrogel walkers K1 shape memory polymers K1 stimuli-responsive K1 unidirectional motion K1 polímeros con memoria de forma K1 movimiento unidireccional K1 sensible a estímulos AB Shape memory polymer actuators have attracted great attention in the past fewdecades for developing soft robots, artificial muscles, and biomedical implants,among others. Herein, under a tutorial perspective, a series of shape memoryactuators that display unidirectional movement upon exposure to specificexternal stimuli is explored. The mechanistic details associated with themovement of each system are also highlighted. In general, an overview of basicdesign principles, the chemical structure of molecular switches, the strategiesused to achieve such controlled and unidirectional movement, as well as keyexperimental aspects, is provided. The most critical challenges of the existingdevices that limit their practical applicability are also discussed. This is of utmostimportance because such limitations must be overcome to fabricate micromotorsthat can generate complex movements, other than simple stretching/contractionor bending, to perform complex tasks. PB Wiley-VCH YR 2020 FD 2020 LK http://riull.ull.es/xmlui/handle/915/22003 UL http://riull.ull.es/xmlui/handle/915/22003 LA en NO Ministerio de Ciencia, Innovación y Universidades DS Repositorio institucional de la Universidad de La Laguna RD 29-mar-2024