Structural evolution of microfibers in seawater and freshwater under simulated sunlight: A small- and wide-angle X-ray scattering study - Astra Piccinini; Giulia Lucia; Daniele Colarossi; Paolo Principi; Heinz Amenitsch; Lucia Pittura; Francesco Regoli; Stefania Gorbi; Francesco Spinozzi (PLoS ONE, 2025)