title: Thermoresponsive and photoluminescent hybrid silicon nanoparticles by surface-initiated group transfer polymerization of diethyl vinylphosphonate.
abstract: We present a method to combine the functional features of poly(diethyl vinylphosphonate) (PDEVP) and photoluminescent silicon nanocrystals. The polymer-particle hybrids were synthesized in three steps through surface-initiated group transfer polymerization using Cp2 YCH2 TMS(thf) as a catalyst. This pathway of particle modification renders the nanoparticle surface stable against oxidation. Although SiNC properties are known to be sensitive toward transition metals, the hybrid particles exhibit red photoluminescence in water. The temperature-dependent coiling of PDEVP results in a change of the hydrodynamic radius of the hybrid particles in water. To the best of our knowledge, this is the first example of controlled catalytic polymerization reactions on a silicon nanocrystal surface.
authors.affiliation: WACKER-Lehrstuhl für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, 85747 Garching bei München (Germany).
authors.forename: Julian
authors.initials: J
authors.lastname: Kehrle
authors.forename: Ignaz M D
authors.initials: IM
authors.lastname: Höhlein
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Yang
authors.forename: Aljosha-Rakim
authors.initials: AR
authors.lastname: Jochem
authors.forename: Tobias
authors.initials: T
authors.lastname: Helbich
authors.forename: Tobias
authors.initials: T
authors.lastname: Kraus
authors.forename: Jonathan G C
authors.initials: JG
authors.lastname: Veinot
authors.forename: Bernhard
authors.initials: B
authors.lastname: Rieger
keywords: LCST; group transfer polymerization; nanoparticles; silicon nanocrystals