Seminario impartido por el Prof. M. Lozada-Cassou (Instituto de Energías Renovables, Universidad Nacional Autónoma de México).
Resumen: A simple model for a macroions solution next to a charged plate is studied through a well established integral equations theory, as a function of the macroions and membrane’s charge. The macroions adsorption to the surface shows an atypical electrical double layer estructure, which implies a violation of the local electroneutrality condition. A breakdown of the charge neutrality, in confined, charged fluids, has been theoretically predicted in the past, through an integral equation theory [1,2], and recently corroborated with a density functional theory, computer simulations [3], and experimentally [4].
However, the results presented here show a novel charge neutrality breakdown, in unconfined, inhomogeneous fluids. Our results are in qualitative agreement with experimental results for Langmuir films of amphiphilic molecules with ionizable head groups [5,6].
[1] M. Lozada-Cassou, J. Chem. Phys. 80, 3344 (1984).
[2] M. Lozada-Cassou, W. Olivares and B. Sulbarán, Phys. Rev. E 53, 522 (1996).
[3] Thiago Colla,Matheus Girotto, Alexandre P. dos Santos, and Yan Levin, J. Chem. Phys. 145, 094704 (2016).
[4] Zhi-Xiang Luo, Yun-Zhao Xing, Yan-Chun Ling, Alfred Kleinhammes, and Yue Wu, Nat. Commun. 6, 6358 (2015).
[5] N. Cuvillier and F. Rondelez, Thin Solid Films 327-329, 19 (1998).
[6] González-Calderón, A and Lozada-Cassou, M., Eur. Phys. J. Spec. Top. 230,1113-1120 (2021).
- Fecha: Viernes 7 de octubre de 2022
- Lugar: Facultad de Ciencias – Aula F02.
- Horario: de 12:00 a 13:00 h
- Organiza: Grupo de Física de Fluidos y Biocoloides
- Más información: mafernandez@ugr.es / Departamento de Física Aplicada