title: Controlled Styrene Monolayer Capping of Silicon Nanocrystals by Room Temperature Hydrosilylation.
abstract: Undecanoic acid facilitates attachment of styrene to hydride-terminated Si nanocrystals at room temperature, avoiding polymerization of styrene, yielding free-standing styrene-terminated Si nanocrystals. The nanocrystals have diamond cubic crystal structure, with photophysical properties similar to typical alkene-capped Si nanocrystals, such as bright photoluminescence with relatively long radiative lifetimes. We propose a reaction mechanism for room temperature styrene addition in which the resonance form of undecanoic acid coordinates to surface Si-H and facilitates H(-) attack at terminal C═C of styrene.
authors.affiliation: Department of Chemical Engineering, Texas Materials Institute, and Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712-1062, United States.
authors.forename: Yixuan
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Department of Chemical Engineering, Texas Materials Institute, and Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712-1062, United States.
authors.forename: Brian A
authors.initials: BA
authors.lastname: Korgel