Much less is known about structure at solid-liquid interfaces than at solid
or liquid surfaces, largely because it is more difficult for experimental
probes to penetrate into an interface. In recent years, the availability of
synchrotron radiation (which is intense and collimated, and whose energy a
nd thus penetration depth can be varied) has made scattering experiments at
such interfaces possible, This article reviews some recent studies of orde
ring at the liquid side of a solid-liquid interface. (C) 2001 Elsevier Scie
nce B.V. All rights reserved.