Extremely small monodisperse micronetworks have potential applications
as molecular containers or reaction vessels. The advantages of the so
l-gel synthesis reported here, involving endcapping with Si-O-SiR3 gro
ups, are pointed out and the characterization of the resulting spheric
al particles (radius between 5 nm and 20 nm), see Figure, is described
. The variety of functional groups and the high density of potential r
eaction sites are stressed.