Issue 6, 2015

Nanometer-sized dynamic entities in an aqueous system

Abstract

Using neutron spin-echo and backscattering spectroscopy, we have found that at low temperatures water molecules in an aqueous solution engage in center-of-mass dynamics that are different from both the main structural relaxations and the well-known localized motions in the transient cages of the nearest neighbor molecules. While the latter localized motions are known to take place on the picosecond time scale and Angstrom length scale, the slower motions that we have observed are found on the nanosecond time scale and nanometer length scale. They are associated with the slow secondary relaxations, or excess wing dynamics, in glass-forming liquids. Our approach, therefore, can be applied to probe the characteristic length scale of the dynamic entities associated with slow dynamics in glass-forming liquids, which presently cannot be studied by other experimental techniques.

Graphical abstract: Nanometer-sized dynamic entities in an aqueous system

Article information

Article type
Paper
Submitted
03 Nov 2014
Accepted
05 Jan 2015
First published
05 Jan 2015

Phys. Chem. Chem. Phys., 2015,17, 4466-4471

Author version available

Nanometer-sized dynamic entities in an aqueous system

E. Mamontov, P. Zolnierczuk and M. Ohl, Phys. Chem. Chem. Phys., 2015, 17, 4466 DOI: 10.1039/C4CP05081A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements