NaCl-Dependent Ordering and Dynamic Mechanical Response in Nanoconfined Water.
Understanding the dynamics of water under nanoscale confinement is important for biology, geology, tribology, and nanotechnology. In many naturally occurring situations, ions are present in water at various concentrations. Here we report on how the addition of sodium ions alters the squeeze-out behavior of water nanoconfined between a mica surface and silicon oxide tip. We find that Na+ions enhance molecular ordering and lead to longer mechanical relaxation times. We also observed a critical ion concentration, above which the confined water switches from a viscous to an elastic (solid-like) response at very slow, quasistatic compression speeds.
University of Peshawar , Department of Physics, University Road, Peshawar 25120, Pakistan.
Shah H
SH
Khan
Wayne State University , Department of Physics and Astronomy, 666 West Hancock, Suite 135 Physics Research Building, Detroit, Michigan 48201, United States.
Edward L
EL
Kramkowski
Wayne State University , Department of Physics and Astronomy, 666 West Hancock, Suite 135 Physics Research Building, Detroit, Michigan 48201, United States.
Peter M
PM
Hoffmann