Fig. 3: Tryptophan fluorescence shift during RH cycle.
From: The role of water mobility on water-responsive actuation of silk
a Schematic depicting Tryptophan’s location in the amorphous regions of RSF has fluorescence properties that are highly sensitive to the hydration state. b The emission/excitation map of fluorescence of RSF at 10% and 90% RH. The red dashed line indicates the 290 nm excitation wavelength. c The emission maximum of RSF samples during hydration and dehydration. d The emission maximum shift as a function of water adsorption, datasets normalized to the 10% RH point. Data in (c) and (d) are presented as mean ± SD (n = 3 hydration/dehydration cycles).
