Structure and optical properties of Au-polyimide nanocomposite films prepared by ion implantation

Maggioni, Gianluigi; Vomiero, Alberto; Carturan, Sara Maria; Scian, Carlo; Mattei, Giovanni; Bazzan, Marco; De Julian Fernandez, Cesar; Mazzoldi, Paolo; Quaranta, A; Della Mea, G.

doi:10.1063/1.1829390

Au-polyimide nanocomposites have been synthesized by implanting different doses of Au+ ions in 100 nm thick films of pyromellitic dianhydride-4,4(') oxydianiline polyimide, prepared by glow discharge vapor deposition polymerization. Unambiguous evidence of Au nanoclusters growth is found only at the highest implantation doses (5x10(16) Au+/cm(2)). Structural, compositional, and optical characterizations show that the implantation induces the compactation of the initial film due to H and C loss. The resulting structure is a composite containing 2-3 nm gold nanoparticles arranged in a layer of about 40 nm and, just beneath the sample surface, a 15 nm thick carbon-rich layer. Optical simulations suggest the presence of a gold-carbon core-shell structure in the nanoparticles.

Titolo:	Structure and optical properties of Au-polyimide nanocomposite films prepared by ion implantation
Autori:	MAGGIONI, GIANLUIGI VOMIERO, ALBERTO CARTURAN, SARA MARIA SCIAN, CARLO MATTEI, GIOVANNI BAZZAN, MARCO DE JULIAN FERNANDEZ, CESAR MAZZOLDI, PAOLO QUARANTA A DELLA MEA G. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2004
Rivista:	APPLIED PHYSICS LETTERS
Abstract:	Au-polyimide nanocomposites have been synthesized by implanting different doses of Au+ ions in 100 nm thick films of pyromellitic dianhydride-4,4(') oxydianiline polyimide, prepared by glow discharge vapor deposition polymerization. Unambiguous evidence of Au nanoclusters growth is found only at the highest implantation doses (5x10(16) Au+/cm(2)). Structural, compositional, and optical characterizations show that the implantation induces the compactation of the initial film due to H and C loss. The resulting structure is a composite containing 2-3 nm gold nanoparticles arranged in a layer of about 40 nm and, just beneath the sample surface, a 15 nm thick carbon-rich layer. Optical simulations suggest the presence of a gold-carbon core-shell structure in the nanoparticles.
Handle:	http://hdl.handle.net/11577/2450667
Appare nelle tipologie:	01.01 - Articolo in rivista

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