We report the first synthesis of silicon nanocrystals embedded in a silicon nitride matrix through a direct pyrolysis of a preceramic polymer (perhydropolysilazane). Structural analysis carried out by XRD, XPS, Raman and TEM reveals the formation of silicon quantum dots and correlates the microstructures with the annealing temperature. The photoluminescence of the nanocomposites was investigated by both linear and nonlinear measurements. Furthermore we demonstrate an enhanced chemical resistance of the nitride matrix, compared to the typical oxide one, in both strongly acidic and basic environments. The proposed synthesis via polymer pyrolysis is a striking innovation potentially allowing a mass-scale production nitride embedded Si nanocrystals.

First synthesis of silicon nanocrystals in amorphous silicon nitride from a preceramic polymer / Biesuz, M.; Bettotti, P.; Signorini, S.; Bortolotti, M.; Campostrini, R.; Bahri, M.; Ersen, O.; Speranza, G.; Lale, A.; Bernard, S.; Soraru, G. D.. - In: NANOTECHNOLOGY. - ISSN 0957-4484. - 30:25(2019), pp. 25560101-25560110. [10.1088/1361-6528/ab0cc8]

First synthesis of silicon nanocrystals in amorphous silicon nitride from a preceramic polymer

Biesuz M.;Bettotti P.;Signorini S.;Bortolotti M.;Campostrini R.;Soraru G. D.
2019-01-01

Abstract

We report the first synthesis of silicon nanocrystals embedded in a silicon nitride matrix through a direct pyrolysis of a preceramic polymer (perhydropolysilazane). Structural analysis carried out by XRD, XPS, Raman and TEM reveals the formation of silicon quantum dots and correlates the microstructures with the annealing temperature. The photoluminescence of the nanocomposites was investigated by both linear and nonlinear measurements. Furthermore we demonstrate an enhanced chemical resistance of the nitride matrix, compared to the typical oxide one, in both strongly acidic and basic environments. The proposed synthesis via polymer pyrolysis is a striking innovation potentially allowing a mass-scale production nitride embedded Si nanocrystals.
2019
25
Biesuz, M.; Bettotti, P.; Signorini, S.; Bortolotti, M.; Campostrini, R.; Bahri, M.; Ersen, O.; Speranza, G.; Lale, A.; Bernard, S.; Soraru, G. D.
First synthesis of silicon nanocrystals in amorphous silicon nitride from a preceramic polymer / Biesuz, M.; Bettotti, P.; Signorini, S.; Bortolotti, M.; Campostrini, R.; Bahri, M.; Ersen, O.; Speranza, G.; Lale, A.; Bernard, S.; Soraru, G. D.. - In: NANOTECHNOLOGY. - ISSN 0957-4484. - 30:25(2019), pp. 25560101-25560110. [10.1088/1361-6528/ab0cc8]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/243062
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