Fig. 2: Optical and morphological data for Azo-FV.

All data were collected at pH 10.5 at a concentration of 10 mg mL⁻¹. a UV-vis spectra for the initial trans-isomer (orange squares), after isomerization to the cis-isomer with 365 nm irradiation (purple circles), and after reversal back to the trans-isomer with 505 nm irradiation (pale blue triangles). The inset shows a photograph of the initial trans-isomer (left), the cis-isomer (middle) and the trans-isomer after reversal (right) and the data in (a) were recorded from these solutions; b Change in absorbance at 340 nm over multiple trans-to-cis-to-trans isomerizations; c Change in viscosity form the initial trans-isomer (orange), after isomerization to the cis-isomer with 365 nm irradiation (purple), and after reversal back to the trans-isomer after 505 nm irradiation (pale blue); d SAXS data for the initial trans-isomer (orange), after isomerization to the cis-isomer with 365 nm irradiation (purple), and after reversal back to the trans-isomer after 505 nm irradiation (pale blue). All isomerizations were carried out by placing two LEDs 5 cm away from the sample and irradiating for 10 minutes.