Fig. 2
From: Design of functional soft interfaces with precise control of the polymer architecture

Design of self-oscillating polymer brushes and their dynamic behaviors. a Illustration of the self-oscillating polymer brush showing autonomous property changes. b Chemical structure of poly(NIPAAm-co-NAPMAm-co-Ru(bpy)3NAPMAm). c Redox response of the polymer brush monitored by QCM-D. d Chemical wave propagation on the polymer brush. (a)-(d): Reproduced from ref. [29] with permission from the American Chemical Society. e Waveform analysis based on the FKN model. Scale: 50 s. Reproduced from ref. [33] with permission from the American Chemical Society. f Propagation direction control with a gradient structure. Scale: 500 µm. Reproduced under the terms of the Creative Commons CC BY license from ref. [34]