The cover picture represents a 60-atom silicon nanocluster with a diam
ond-like structure, within the supercage of zeolite Y. In this article
, recent developments in the chemical synthesis of novel and well-defi
ned nanoscale forms of luminescent silicon are reviewed and the method
s used to ''trick'' silicon (an indirect bandgap semiconductor with el
ectric dipole forbidden luminescence) into emitting light discussed.