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Facile synthesis, microstructure and photophysical properties of core-shell nanostructured (SiCN)/BN nanocomposites

Increasing structural complexity at nanoscale can permit superior control over photophysical properties in the precursor-derived semiconductors. We demonstrate here the synthesis of silicon carbonitride (SiCN)/boron nitride (BN) nanocomposites via a polymer precursor route wherein the cobalt polyami...

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Autores principales: Zhang, Qian, Jia, Dechang, Yang, Zhihua, Cai, Delong, Laine, Richard M., Li, Qian, Zhou, Yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5233973/
https://www.ncbi.nlm.nih.gov/pubmed/28084300
http://dx.doi.org/10.1038/srep39866
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author Zhang, Qian
Jia, Dechang
Yang, Zhihua
Cai, Delong
Laine, Richard M.
Li, Qian
Zhou, Yu
author_facet Zhang, Qian
Jia, Dechang
Yang, Zhihua
Cai, Delong
Laine, Richard M.
Li, Qian
Zhou, Yu
author_sort Zhang, Qian
collection PubMed
description Increasing structural complexity at nanoscale can permit superior control over photophysical properties in the precursor-derived semiconductors. We demonstrate here the synthesis of silicon carbonitride (SiCN)/boron nitride (BN) nanocomposites via a polymer precursor route wherein the cobalt polyamine complexes used as the catalyst, exhibiting novel composite structures and photophysical properties. High Resolution Transmission Electron Microscopy (HRTEM) analysis shows that the diameters of SiCN−BN core−shell nanocomposites and BN shells are 50‒400 nm and 5‒25 nm, respectively. BN nanosheets (BNNSs) are also observed with an average sheet size of 5‒15 nm. The photophysical properties of these nanocomposites are characterized using the UV-Vis and photoluminescence (PL) analyses. The as-produced composites have emission behavior including an emission lifetime of 2.5 ns (±20 ps) longer observed in BN doped SiCN than that seen for SiC nanoparticles. Our results suggest that the SiCN/BN nanocomposites act as semiconductor displaying superior width photoluminescence at wavelengths spanning the visible to near-infrared (NIR) spectral range (400‒700 nm), owing to the heterojunction of the interface between the SiC(N) nanowire core and the BN nanosheet shell.
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spelling pubmed-52339732017-01-17 Facile synthesis, microstructure and photophysical properties of core-shell nanostructured (SiCN)/BN nanocomposites Zhang, Qian Jia, Dechang Yang, Zhihua Cai, Delong Laine, Richard M. Li, Qian Zhou, Yu Sci Rep Article Increasing structural complexity at nanoscale can permit superior control over photophysical properties in the precursor-derived semiconductors. We demonstrate here the synthesis of silicon carbonitride (SiCN)/boron nitride (BN) nanocomposites via a polymer precursor route wherein the cobalt polyamine complexes used as the catalyst, exhibiting novel composite structures and photophysical properties. High Resolution Transmission Electron Microscopy (HRTEM) analysis shows that the diameters of SiCN−BN core−shell nanocomposites and BN shells are 50‒400 nm and 5‒25 nm, respectively. BN nanosheets (BNNSs) are also observed with an average sheet size of 5‒15 nm. The photophysical properties of these nanocomposites are characterized using the UV-Vis and photoluminescence (PL) analyses. The as-produced composites have emission behavior including an emission lifetime of 2.5 ns (±20 ps) longer observed in BN doped SiCN than that seen for SiC nanoparticles. Our results suggest that the SiCN/BN nanocomposites act as semiconductor displaying superior width photoluminescence at wavelengths spanning the visible to near-infrared (NIR) spectral range (400‒700 nm), owing to the heterojunction of the interface between the SiC(N) nanowire core and the BN nanosheet shell. Nature Publishing Group 2017-01-13 /pmc/articles/PMC5233973/ /pubmed/28084300 http://dx.doi.org/10.1038/srep39866 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Zhang, Qian
Jia, Dechang
Yang, Zhihua
Cai, Delong
Laine, Richard M.
Li, Qian
Zhou, Yu
Facile synthesis, microstructure and photophysical properties of core-shell nanostructured (SiCN)/BN nanocomposites
title Facile synthesis, microstructure and photophysical properties of core-shell nanostructured (SiCN)/BN nanocomposites
title_full Facile synthesis, microstructure and photophysical properties of core-shell nanostructured (SiCN)/BN nanocomposites
title_fullStr Facile synthesis, microstructure and photophysical properties of core-shell nanostructured (SiCN)/BN nanocomposites
title_full_unstemmed Facile synthesis, microstructure and photophysical properties of core-shell nanostructured (SiCN)/BN nanocomposites
title_short Facile synthesis, microstructure and photophysical properties of core-shell nanostructured (SiCN)/BN nanocomposites
title_sort facile synthesis, microstructure and photophysical properties of core-shell nanostructured (sicn)/bn nanocomposites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5233973/
https://www.ncbi.nlm.nih.gov/pubmed/28084300
http://dx.doi.org/10.1038/srep39866
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