Send to

Choose Destination
Phys Rev Lett. 2001 Oct 8;87(15):156103. Epub 2001 Sep 24.

Molecular-scale density oscillations in water adjacent to a mica surface.

Author information

Environmental Research Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.


High-resolution specular x-ray reflectivity of the mica(001)-water interface under ambient conditions reveals oscillations in water oxygen density in the surface-normal direction, giving evidence of interfacial water ordering. The spacings between neighboring water layers in the near-surface, strongly oscillatory region are 2.5(2)-2.7(2) A, approximately the size of the water molecule. The density oscillations extend to about 10 A above the surface and do not strictly maintain a solvent-size periodicity as that in interfacial liquid metal and hard-sphere molecular liquids. We interpret this oscillatory density profile of the interfacial water as due to the "hard-wall" effect of the molecularly smooth mica surface.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center