title: Silanization effect on the photoluminescence characteristics of crystalline and amorphous silicon nanoparticles.
abstract: Silicon nanoparticles synthesized by two different methods were surface modified with 3-mercaptopropyltrimethoxysilane. The particles of ~2 nm size exhibit photoluminescence (PL) in the UV-Vis range of the spectrum. The most intense PL band at 430 nm with an emission lifetime of 1-2 ns is attributed to the presence of the surface defects Si-O-Si, generated after anchoring the organic molecule onto the interface. The excitation-emission matrix of this band is essentially independent of the technique of synthesis, crystalline structure, and size of the silicon nanoparticles.
authors.affiliation: Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de la Plata, CLa Plata, Argentina. caregnato@inifta.unlp.edu.ar
authors.forename: Paula
authors.initials: P
authors.lastname: Caregnato
authors.forename: Maria Laura
authors.initials: ML
authors.lastname: Dell'Arciprete
authors.forename: Mónica Cristina
authors.initials: MC
authors.lastname: Gonzalez