Figure 4

For 2% pH = 5.37 hydrogel, L-XRD, SEM, TEM and cryo-TEM data, and the results of the interpretation of IR data (IR data itself can be found in Supplementary Fig. S9). L-XRD data and the schematics of the essential features of gel microstructure at (a) 25 °C (crystalline bilayers) and (b) 50 °C (worm-like micelles), (c) cryo-TEM image of a 50 °C sample, (d) TEM image of a 25 °C sample, (e) SEM image of a 25 °C sample, and (f) possible configurations of carboxylic acid:amine 2:1 complex observed by IR at 25 °C. In (a) the order of observed peaks for two lamellar structures are indicated. In (b), the very broad peak of the L-XRD intensity pattern is centred at 0.433 (Å⁻¹) [see text]. Also, the results of fits of power law functions of I = Kq ^α (α = −1 and −4) to the intensity pattern of (b) are shown (see text).