Laboratoire Charles Coulomb UMR 5221 CNRS/UM2 (L2C)


Accueil > La Recherche > Axes & Equipes > Nanostructures & Spectroscopies > Equipe : Nanomatériaux > Thème : Nanomatériaux fonctionnels

New Bio-inspired Membrane made of a Biological Ion Channel confined into the Cylindrical Nanopore of a Solid-State Polymer

par Sébastien LAYSSAC - publié le

Recent advances in membrane sciences allow us the use of membranes in many fields such as food and agriculture, potable water production, industrial water treatment and biotechnology. Among the newly developed technologies, nanofiltration for liquids is the most recent one. One of the scientific challenges is to develop nanofilters with both high permeability and selectivity, which are often considered as antagonist features. Today, the number of solid state membranes that are readily useable is limited and their performances, i.e. permeability and selectivity, are restricted.

Our main objective is the building of a hybrid membrane made of nanoporous solid state membrane in which biological ionic channels, known for their high selectivity and permeability properties, are confined and thus can be thought as a challenging way to develop successful nanofilters.

The first essential step is to control the insertion of the considered biological ionic channels into the nanoporous solid state membrane. The second step is then to measure ion diffusion of various chlorine solutions through the membrane. The first results clearly emphasize that the presence of the ionic chanel gramicidin-A into the nanopore of a track-etched nanoporous polymer is beneficial to ion transport.

Further insights into microscopic mechanisms involved in this phenomenon are requested. Nevertheless, these primary results open a very promising field of research for nanofiltration.