title: Synthesis and Microstructural Investigations of Organometallic Pd(II) Thiol-Gold Nanoparticles Hybrids.
abstract: In this work the synthesis and characterization of gold nanoparticles functionalized by a novel thiol-organometallic complex containing Pd(II) centers is presented. Pd(II) thiol, trans, trans-[dithiolate-dibis(tributylphosphine)dipalladium(II)-4,4'-diethynylbiphenyl] was synthesized and linked to Au nanoparticles by the chemical reduction of a metal salt precursor. The new hybrid made of organometallic Pd(II) thiol-gold nanoparticles, shows through a single S bridge a direct link between Pd(II) and Au nanoparticles. The size-control of the Au nanoparticles (diameter range 2-10 nm) was achieved by choosing the suitable AuCl(4) (-)/thiol molar ratio. The size, strain, shape, and crystalline structure of these functionalized nanoparticles were determined by a full-pattern X-ray powder diffraction analysis, high-resolution TEM, and X-ray photoelectron spectroscopy. Photoluminescence spectroscopy measurements of the hybrid system show emission peaks at 418 and 440 nm. The hybrid was exposed to gaseous NO(x) with the aim to evaluate the suitability for applications in sensor devices; XPS measurements permitted to ascertain and investigate the hybrid -gas interaction.
authors.forename: Floriana
authors.initials: F
authors.lastname: Vitale
authors.forename: Rosa
authors.initials: R
authors.lastname: Vitaliano
authors.forename: Chiara
authors.initials: C
authors.lastname: Battocchio
authors.forename: Ilaria
authors.initials: I
authors.lastname: Fratoddi
authors.forename: Cinzia
authors.initials: C
authors.lastname: Giannini
authors.forename: Emanuela
authors.initials: E
authors.lastname: Piscopiello
authors.forename: Antonella
authors.initials: A
authors.lastname: Guagliardi
authors.forename: Antonio
authors.initials: A
authors.lastname: Cervellino
authors.forename: Giovanni
authors.initials: G
authors.lastname: Polzonetti
authors.forename: Maria Vittoria
authors.initials: MV
authors.lastname: Russo
authors.forename: Leander
authors.initials: L
authors.lastname: Tapfer