TY - JOUR AB - Soft, stimulus-responsive 3D structures created from crosslinked poly(ionic liquid)s (PILs) have been fabricated at unprecedented sub-micron resolution by direct laser writing (DLW). These structures absorb considerable quantities of solvent (e.g., water, alcohol, and acetone) to produce PIL hydrogels that exhibit stimulus-responsive behavior. Due to their flexibility and soft, responsive nature, these structures are much more akin to biological systems than the conventional, highly crosslinked, rigid structures typically produced using 2-photon polymerization (2-PP). These PIL gels expand/contract due to solvent uptake/release, and, by exploiting inherited properties of the ionic liquid monomer (ILM), thermo-responsive gels that exhibit reversible area change (30 ± 3%, n = 40) when the temperature is raised from 20 °C to 70 °C can be created. The effect is very rapid, with the response indistinguishable from the microcontroller heating rate of 7.4 °C s−1. The presence of an endoskeleton-like framework within these structures influences movement arising from expansion/contraction and assists the retention of structural integrity during actuation cycling. AU - Tudor,A AU - Delaney,C AU - Zhang,H AU - Thompson,AJ AU - Curto,VF AU - Yang,GZ AU - Higgins,MJ AU - Diamond,D AU - Florea,L DO - 10.1016/j.mattod.2018.07.017 EP - 816 PY - 2018/// SN - 1369-7021 SP - 807 TI - Fabrication of soft, stimulus-responsive structures with sub-micron resolution via two-photon polymerization of poly(ionic liquid)s T2 - Materials Today UR - http://dx.doi.org/10.1016/j.mattod.2018.07.017 UR - http://hdl.handle.net/10044/1/63170 VL - 21 ER -