Evidence for water structuring forces between surfaces
- ORNL
- National Institutes of Health
Structured water on apposing surfaces can generate significant energies due to reorganization and displacement as the surfaces encounter each other. Force measurements on a multitude of biological structures using the osmotic stress technique have elucidated commonalities that point toward an underlying hydration force. In this review, the forces of two contrasting systems are considered in detail: highly charged DNA and nonpolar, uncharged hydroxypropyl cellulose. Conditions for both net repulsion and attraction, along with the measured exclusion of chemically different solutes from these macromolecular surfaces, are explored and demonstrate features consistent with a hydration force origin. Specifically, the observed interaction forces can be reduced to the effects of perturbing structured surface water.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1031001
- Journal Information:
- Current Opinion in Colloid & Interface Science, Vol. 16, Issue 6; ISSN 1359-0294
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of short-chain alcohols and pyridine on the hydration forces between silica surfaces
Molecular theory and the effects of solute attractive forces on hydrophobic interactions