title: Size-dependent reactivity in hydrosilylation of silicon nanocrystals.
abstract: We present an investigation into the influence of nanocrystal size on the reactivity of silicon nanocrystals (Si-NCs) in near-UV photochemical hydrosilylation. The size-dependent reactivity of Si-NCs with photoluminescence (PL) in the visible and near-infrared regions was evaluated using PL and Fourier-transform infrared (FTIR) spectroscopy, and small-angle X-ray scattering (SAXS). Under near-UV excitation, Si-NCs with PL in the visible spectral region react faster than Si-NCs with near-IR PL, allowing partial separation of a mixture of Si-NC sizes through hydrosilylation. This is attributed to quantum size effects in the exciton-mediated mechanisms proposed for this reaction.
authors: Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada.
authors: Joel A
authors: JA
authors: Kelly
authors: Amber M
authors: AM
authors: Shukaliak
authors: Michael D
authors: MD
authors: Fleischauer
authors: Jonathan G C
authors: JG
authors: Veinot