Journal
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
Volume 53, Issue -, Pages -Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.cocis.2021.101422
Keywords
Polyelectrolyte; Interfacial tension; Phase separation; Critical salt con-centration; Critical temperature; Deformed droplet retraction; Surface; forces apparatus; Colloidal probe AFM
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Funding
- National Institute of Standards and Technology Materials Genome Initiative
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The study of interfacial phenomena driven by polyelectrolyte complexation at liquid-liquid interfaces presents measurement challenges addressed by force-sensitive methods and deformed droplet retraction. The ultralow interfacial tension in these systems is sensitive to salt concentration and temperature, displaying universal features described by mean-field theory. Multiple areas of fundamental development and novel applications of charge complexation for interfacial study, including examples from membraneless organelles and biomolecular condensates, are discussed.
A continued interest in polyelectrolyte phase diagrams guides the study of interfacial phenomena driven by polyelectrolyte complexation. The liquid-liquid interfaces formed by associative phase separation of oppositely charged synthetic and natural polyelectrolytes provide measurement challenges addressed by force-sensitive methods and deformed droplet retraction. The ultralow interfacial tension, typical of these systems, is sensitive to salt concentration and temperature and displays universal features described by mean-field theory. Several areas of fundamental development and novel applications of charge complexation for interfacial study and examples from membraneless organelles and biomolecular condensates are described.
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