Metal particles supported by porous glass

Abstract

We have investigated the use of porous ‘Vycor’ glass as a supporting matrix for silver and alkali-metal particles. By different methods of preparation it was possible to produce silver particles either within the pores of the glass or on the external surface. The optical spectra of silver particles are reported and discussed. Alkali-metal particles gave strong electron spin resonance spectra, but in the case of silver weak electron spin resonance signals were detected from the surface particles only.