Ion multivalence and like-charge polyelectrolyte attraction |
| |
Authors: | Butler John C Angelini Thomas Tang Jay X Wong Gerard C L |
| |
Institution: | Department of Materials Science & Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA. |
| |
Abstract: | It is known empirically that multivalent ions generate attractions between like-charged polyelectrolytes, with different valence requirements for different systems. How multivalent must an ion be before it can condense a given polyelectrolyte? Using charge-tunable M13 virus rods and a family of artificial homologous "dumbbell" divalent ions of different sizes, we have constructed a multivalent ion-polyelectrolyte phase diagram, and find an experimentally motivated general criterion for like-charged attraction based on the ion valence, ion size, and the Gouy-Chapman length. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|