Schematic of temperature-responsive cell culture surface for acceleration of cell detachment. (a) PIPAAm-TCPS, (b) PIPAAm-PM, (c) P(IPAAm-co
-PEG)-PM, (d) (1, 2) comb-type grafted PIPAAm gel and (3) ctPIPAAm-TCPS. These images of (a), (b), and (c) from reference [37
] (Z. Tang et al., Temperature-Responsive Polymer Modified Surface for Cell Sheet Engineering, Polymers, 4, pp. 1478) are under a Creative Commons Attribution 3.0 International License (CC-BY-3.0). Illustration of (d) was reprinted with permission from reference [38
]. Copyright © 2010, Elsevier Ltd. (e) PIPAAm-PAAm-TCPS with a double polymer layer and (f) stretchable temperature-responsive cell culture surface (PIPAAm-PAAm-TCPS). Illustration of (e) was reprinted with permission from reference [39
]. Copyright © 2014, Acta Materialia Inc. Published by Elsevier Ltd.