The design of nanostructured materials with specific physical properties is generally pursued by tuning nanoparticle size, concentration, or surface passivation. An important step forward is to realize “active” systems where nanoparticles are vehicles for controlling, in situ, some specific, tuneable features of a responsive functional material. In this perspective, this work focuses on the rational design of a nanostructured glass with electrically tuneable dielectric function obtained by injection and accumulation of charge on embedded conductive nanocrystals. This enables electrically controlled switching of semiconducting nanophases to charged polarisable states to be achieved, which could lead to smart, field-enhancement applications in nanophotonics and plasmonics. Here, it is shown that such response switching can be obtained if a percolating charge-transport mechanism is activated through a disordered tree-like network, as is demonstrated to be possible in SiO2 films where suitable dispersions of SnO2 nanocrystals, with conductive interfaces, are obtained as a result of a new synthesis strategy.

Paleari, A., Brovelli, S., Lorenzi, R., Giussani, M., Lauria, A., Mochenova, N., et al. (2010). Tunable dielectric function in electric-responsive glass with tree-like percolating pathways of chargeable conductive nanoparticles. ADVANCED FUNCTIONAL MATERIALS, 20(20), 3511-3518 [10.1002/adfm.201000449].

Tunable dielectric function in electric-responsive glass with tree-like percolating pathways of chargeable conductive nanoparticles

PALEARI, ALBERTO MARIA FELICE
;
BROVELLI, SERGIO
;
LORENZI, ROBERTO;LAURIA, ALESSANDRO;CHIODINI, NORBERTO
2010

Abstract

The design of nanostructured materials with specific physical properties is generally pursued by tuning nanoparticle size, concentration, or surface passivation. An important step forward is to realize “active” systems where nanoparticles are vehicles for controlling, in situ, some specific, tuneable features of a responsive functional material. In this perspective, this work focuses on the rational design of a nanostructured glass with electrically tuneable dielectric function obtained by injection and accumulation of charge on embedded conductive nanocrystals. This enables electrically controlled switching of semiconducting nanophases to charged polarisable states to be achieved, which could lead to smart, field-enhancement applications in nanophotonics and plasmonics. Here, it is shown that such response switching can be obtained if a percolating charge-transport mechanism is activated through a disordered tree-like network, as is demonstrated to be possible in SiO2 films where suitable dispersions of SnO2 nanocrystals, with conductive interfaces, are obtained as a result of a new synthesis strategy.
Articolo in rivista - Articolo scientifico
nanoparticles, silica films, dielectric function, percolative charge transport;
English
3511
3518
8
Paleari, A., Brovelli, S., Lorenzi, R., Giussani, M., Lauria, A., Mochenova, N., et al. (2010). Tunable dielectric function in electric-responsive glass with tree-like percolating pathways of chargeable conductive nanoparticles. ADVANCED FUNCTIONAL MATERIALS, 20(20), 3511-3518 [10.1002/adfm.201000449].
Paleari, A; Brovelli, S; Lorenzi, R; Giussani, M; Lauria, A; Mochenova, N; Chiodini, N
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/17559
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