This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 764958 (FT, IA). The authors wish to thank the Institut Laue-Langevin (ILL), France for neutron beamtime on the FIGARO reflectometer (DOI: 10.5291/ILL-DATA.9-12-588 and 10.5291/ILL-DATA.9-13-838). We would also like to thank Armando Maestro for the assistance with NR measurements. The Chinese Scholarship Council (CSC) funding is gratefully acknowledged for sponsoring P.L. (PhD studentship, 201606150067). LF also would like to acknowledge the funding of the FCT project with the acronym ENDEAVOUR (Ref: EXPL/BTMORG/ 1348/2021) and PT2020 project with the acronym BIO-MED (Ref: 181228). IA was supported by FCT (Ref: 2021.07471.BD).