Study of the formation of nanoparticles of alkali and alkaline-earth metals in crystals and glasses under electron irradiation

• As a result of the electron beam treatment with an electron energy of 50 keV and heat treatment in alkali silicate glasses, Li, Na and K nanoparticles having plasmon resonance are formed. The effect of electrons on alkali and alkaline-earth metal halide crystals (LiF, NaCl, KCl, KBr, MgF2, CaF2, BaF2) at room temperature leads to the formation of Li, Na, K, Mg, Ca and Ba nanoparticles in the near-surface layer of the crystal with plasmon resonance. In fluoride crystals, irradiation leads to the appearance of luminescence due to the formation of fluorescent centers of the form F2 and F3+.

 

Photos of the KBr crystal (a) and the luminescence of the MgF2 crystal after electron irradiation.
 
Fields of application:
Nonlinear optical media, metamaterials, recording of optical information.
 

 

Information © 2015-2017 ITMO University
© 2015 Department of Information Technology