Self-assembled three-dimensional Cu-Ge nanoweb composite.

The inexpensive combination of cryogenically milled Cu(3)Ge powders sonochemically processed in a standard ultrasonic cleaner has led to the prototype of a heretofore undescribed class of material. This prototype is a nanostructured composite composed of 4.5 nm diameter Cu nanocrystals embedded in a three-dimensional (3D) amorphous CuGeO(3) polyhedron web matrix.