Figure 1.

a) Structure of 2NapFF. b) Viscosity of a solution of 2NapFF (10 mg mL⁻¹; pH 11) at 25 °C (•), heated to 40 °C for 2 min (•), and recooled to 25 °C (•). c) Photograph of a solution of 2NapFF (10 mg mL⁻¹; pH 11) heated to i) 70 °C, ii) 60 °C, and iii) 40 °C, and subsequently cooled; iv) no heating (scale bar=2 cm; photographs taken 3 h after recooling). d) Frequency sweep of a solution of 2NapFF (10 mg mL⁻¹; pH 11) before a heat/cool cycle (G′ (▪); G′′ (□)) and after a heat/cool cycle (G′ (▴); G′′ (▵)). Note, much of the G′ data cannot be plotted as it is in the noise and too small for the instrument to detect. All data were collected at 25 °C.