title: Confinement-induced fluid-gel transition in polymeric solutions.
abstract: The viscoelastic properties of confined polymer solutions are probed by particle-tracking microrheology. The mean squared displacement of spherical probe particles embedded in the solution and the storage and loss moduli of the system are measured as the level of confinement is increased. It is found that those quantities change continuously as the confinement increases, and, at severe conditions, when the constrain reaches the size of the polymer molecule, the system undergoes a transition from a viscoelastic fluid to a gel.
authors: Instituto de Fisica Manuel Sandoval Vallarta, Universidad Autonoma de San Luis Potosi, Alvaro Obregon 64, 78000 San Luis Potosi, S.L.P., Mexico.
authors: Catalina
authors: C
authors: Haro-Pérez
authors: Andrés
authors: A
authors: García-Castillo
authors: José Luis
authors: JL
authors: Arauz-Lara
mesh_terms: D004548:Elasticity; D005782:Gels / Q000737:chemistry; D055595:Mechanical Phenomena; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D014783:Viscosity
chemical_list: D005782:Gels; D011108:Polymers; D012996:Solutions