Fluorescence Emission of Self‐assembling Amyloid‐like Peptides: Solution versus Solid State

Analysis of the intrinsic UV‐visible fluorescence exhibited by self‐assembling amyloid‐like peptides in solution and in solid the state highlights that their physical state has a profound impact on the optical properties. In the solid state, a linear dependence of the fluorescence emission peaks as a function of excitation wavelength is detected. On the contrary, an excitation‐independent emission is observed in solution. The present findings constitute a valuable benchmark for current and future explanations of the fluorescence emission by amyloids.