Fig. 3: Understanding the Turing structure by the reaction-diffusion equation.
From: Homogeneous solution assembled Turing structures with near zero strain semi-coherence interface
a Two-dimensional diffusion-ordered nuclear magnetic resonance spectroscopy (2D DOSY) of a mixed solution of Fe[C5H7O2]3 and Zn(CH3COO)2. b Mean square displacement of Zn2+ in different solutions in Fig. 2f. The purple red and dark green curves represent the C solution (Fe(NO3)3, Zn(CH3COO)2) and F solution (Fe[C5H7O2]3, Zn(CH3COO)2), respectively. c Snapshots of the dynamic process of F solution (Fe[C5H7O2]3, Zn(CH3COO)2) at different simulation times. The orange balls are Zn2+, the green balls are Fe3+, the pink represents [C5H7O2]− and the cyan represents CH3COO−. d Snapshots of the dynamic process of C solution (Fe(NO3)3, Zn(CH3COO)2) at different simulation times. The orange balls are Zn2+, the green balls are Fe3+, and purple red represents NO3−. e SEM image of Zn: Fe = 1:2.4 film. f The Turing interface film (Zn: Fe = 1:3.5). g The Turing interface film (Zn: Fe = 1:4). In the fourth row of the figure, blue represents ZnFe2O4, and pink represents α-Fe2O3. h Patterns exhibited by prey and predator of the system at T = 100, 600, and 1000, respectively. The difference in diffusion coefficient is 30 times. Scale bars: c, d, e, 100 nm.
