title: Ion transport through polyelectrolyte multilayers.
abstract: Polyelectrolyte multilayer (PEM) films and capsules loaded with ion-sensitive fluorophores can be used as ion-sensors for many applications including measurements of intracellular ion concentration. Previous studies have shown the influence of the PEM films/shells on the specific response of encapsulated ion-sensitive fluorophores. PEM shells are considered as semipermeable barriers between the environment and the encapsulated fluorophores. Parameters such as the time response of the encapsulated sensor can be affected by the porosity and charge of the PEM shell. In this study, the time response of an encapsulated pH-sensitive fluorophore towards pH changes in the surrounding environment is investigated. Furthermore, the conductance of PEM films for potassium ions is determined.
authors: Fachbereich Physik, Philipps Universität Marburg, Marburg, Germany; BIONAND, Centro Andaluz de Nanomedicina y Biotecnología, Málaga, Spain.
authors: Susana
authors: S
authors: Carregal-Romero
authors: Philipp
authors: P
authors: Rinklin
authors: Susanne
authors: S
authors: Schulze
authors: Martin
authors: M
authors: Schäfer
authors: Andrea
authors: A
authors: Ott
authors: Dominik
authors: D
authors: Hühn
authors: Xiang
authors: X
authors: Yu
authors: Bernhard
authors: B
authors: Wolfrum
authors: Karl-Michael
authors: KM
authors: Weitzel
authors: Wolfgang J
authors: WJ
authors: Parak
mesh_terms: D002214:Capsules / Q000737:chemistry; D004058:Diffusion; D004573:Electrolytes / Q000737:chemistry / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D017136:Ion Transport; D007477:Ions / Q000737:chemistry / Q000378:metabolism; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation; D008856:Microscopy, Fluorescence; D011108:Polymers / Q000737:chemistry*; D016062:Porosity
chemical_list: D002214:Capsules; D004573:Electrolytes; D007477:Ions; D011108:Polymers