Rodríguez Abreu, CarlosFruh, Maxime2019-10-222019-10-222019-07https://hdl.handle.net/2445/142748Màster en Nanociència i Nanotecnologia, Facultat de Física, Universitat de Barcelona, Curs: 2018-2019. Tutor: Carlos Rodriguez-AbreuTwo types of fibers have been prepared by self-assembly. The first system is made of Astrophloxine hydrogel fibers, based on the stacking of molecules by π- π interactions. Various properties of the hydrogel have been characterized with UV-vis absorbance, Fluorescence spectroscopy, calorimetric profiles, and rheology. The hydrogel shows temperature-dependent fluorescence. Above the melting temperature T>44°C, fluorescence and hydrogel structure are lost, but they are recovered upon cooling, demonstrating that the process is reversible. The fibers also showed a temperature-dependent birefringency. The second system of fibers was formed by ionic self-assembly (ISA) of two oppositely charged dyes. This system was characterized by SEM and TEM, as well as X-Ray diffraction. The ISA fibers were able to encapsulate a drug, showing promise for controlled drug release8 p.application/pdfengcc-by-nc-nd (c) Fruh, 2019http://creativecommons.org/licenses/by-nc-nd/3.0/es/Fibres fluorescentsHidrogelTreballs de fi de màsterFluorescent fibersHydrogelMaster's thesesinfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccess