Silicon nanocrystals stabilized by an ionic liquid, dimethylimidazolium iodide, were synthesized by chemical reduction of SiBr.sub.4 with metallic Na in an organic solvent, diglyme. The nanoparticles were crystalline with a diamond cubic lattice and average size of 3.5 nm. Solid state 13.sup.C- and 29.sup.Si-NMR CP MAS spectra indicate the formation of imidazolium carbene, which ligates the Si atoms at the surface of the nanoparticles. The synthesized Si nanoparticles exhibit photoluminescence with an emission maximum in the red spectral range when excited at 320 nm. The origin of this luminescence is suggested to be mainly related to quantum confinement.
Item Citation: Journal of Nanoparticle Research: An Interdisciplinary Forum for Nanoscale Science and Technology. May 2011, Vol. 13 Issue 5, p1971, 8 p.Accession Number: edsgcl.256405579; Publication Type: Academic Journal; Source: Journal of Nanoparticle Research: An Interdisciplinary Forum for Nanoscale Science and Technology; Language: English; Publication Date: 20110501; Rights: Copyright 2011 Gale, Cengage Learning. All rights reserved., COPYRIGHT 2011 Springer; Imprint: Springer