467572 Electrokinetics of Heterogeneous Ion-Exchange Membranes
To investigate the effect of membrane structure on the exhibited behavior, we developed a system that integrates a small piece of ion exchange membranes and allows to (i) reconstruct swollen heterogeneous membranes by means of micro-computed tomography and (ii) study their electrochemical and electrokinetic behavior when connected in DC field. In this contribution, we will show the effect of ionic strength of water solutions on swelling and shrinkage of membranes and associated irreversible changes in the membrane structures. This will be followed by experimental analysis of the electrokinetic behavior of these membranes when connected in overlimiting region and discussion about the role of structure in appearance of this region and thus sensitivity to the presence of biomolecules.
 Slouka, Z., Senapati, S., Chang, H.C., Microfluidic systems with ion-selective membranes, Annual Review Analytical Chemistry, 2014; 7:317-335
 Senapati, S., Slouka, Z., Shah, S. et al. An ion-exchange nanomembrane sensor for detection of nucleic acids using a surface charge inversion phenomenon, Biosensor&Bioelectronics, 2014, 60:92-100
See more of this Group/Topical: 2016 Annual Meeting of the AES Electrophoresis Society