Size and Surface Control of Optical Properties in Silicon Nanoparticles

Abstract:

Si-nanoparticles (NP) are attracting steadily growing interest due to their intriguing sizedependent optical properties. The most challenging task in preparing Si-NP is to succeed in controlling the particle size and size distribution and the surface properties. To this respect, the method of laser synthesis of Si-NP from gas phase reactants appears as an ideal tool, being a very versatile and controllable synthesis technique, but the collected Si-NP are strongly agglomerated. Here we report on attempts to decrease the agglomeration of the Si NP by following two complementary strategies: - investigation and control of nanoparticle formation and growth during the synthesis process; - dispersion of the agglomerates and termination of the particle surfaces by controlled chemical etching followed by surface passivation and stabilization treatments. The properties of as-prepared and processed Si NP will be presented and discussed.

• Periodical: Advances in Science and Technology (Volume 45)
• Pages: 2620-2626
• DOI: https://doi.org/10.4028/www.scientific.net/AST.45.2620
• Online since: October 2006
• Authors: F. Fabbri, Elisabetta Borsella, M. Carpanese, Roberta Fantoni, R. Caterino, Rosaria D'Amato, Mauro Falconieri, Emanuele Serra
• Keywords: Agglomeration of Particles, Passivation of Particles, Photoluminescence (PL), Si-nc

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