Synthesis and properties of self-assembled ultralong core-shell Si3N4/SiO2 nanowires by catalyst-free technique

Yang Chen, Chang Zhang, Ning Wang, Martin Jensen, Xianfeng Li, Xingxiang Zhang

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Self-assembled ultralong Si 3N 4/SiO 2 nanowires (SiNNWs) with core-shell structure are prepared by air jet-spinning followed by high-temperature calcination employing low-cost fumed nano silica and industrial polyacrylonitrile as raw materials. Without using metal catalysts or reductive atmosphere, Si 3N 4/SiO 2 nanowires are generated through autocatalysis and self-assembly. The ultralong SiNNWs are uniform and continuous throughout the entire length with a 3–4 nm amorphous SiO 2 shell layer on surface of the Si 3N 4. The diameter of the SiNNWs is about 80–200 nm with the length being at centimeter level and the main component of the SiNNWs is the standard hexagonal cell of α-Si 3N 4. Moreover, the photoluminescence spectrum of SiNNWs exhibits an intense blue-green light emission at room temperature. The self-assembly mechanism of the SiNNWs is discussed.

Original languageEnglish
JournalCeramics International
Volume45
Issue number16
Pages (from-to)20040-20045
Number of pages6
ISSN0272-8842
DOIs
Publication statusPublished - Nov 2019

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Nanowires
Catalysts
Self assembly
Polyacrylonitriles
Light emission
silicon nitride
Silicon Dioxide
Calcination
Photoluminescence
Raw materials
Metals
Silica
Temperature
Air
Costs

Cite this

Chen, Yang ; Zhang, Chang ; Wang, Ning ; Jensen, Martin ; Li, Xianfeng ; Zhang, Xingxiang. / Synthesis and properties of self-assembled ultralong core-shell Si3N4/SiO2 nanowires by catalyst-free technique. In: Ceramics International. 2019 ; Vol. 45, No. 16. pp. 20040-20045.
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title = "Synthesis and properties of self-assembled ultralong core-shell Si3N4/SiO2 nanowires by catalyst-free technique",
abstract = "Self-assembled ultralong Si 3N 4/SiO 2 nanowires (SiNNWs) with core-shell structure are prepared by air jet-spinning followed by high-temperature calcination employing low-cost fumed nano silica and industrial polyacrylonitrile as raw materials. Without using metal catalysts or reductive atmosphere, Si 3N 4/SiO 2 nanowires are generated through autocatalysis and self-assembly. The ultralong SiNNWs are uniform and continuous throughout the entire length with a 3–4 nm amorphous SiO 2 shell layer on surface of the Si 3N 4. The diameter of the SiNNWs is about 80–200 nm with the length being at centimeter level and the main component of the SiNNWs is the standard hexagonal cell of α-Si 3N 4. Moreover, the photoluminescence spectrum of SiNNWs exhibits an intense blue-green light emission at room temperature. The self-assembly mechanism of the SiNNWs is discussed.",
author = "Yang Chen and Chang Zhang and Ning Wang and Martin Jensen and Xianfeng Li and Xingxiang Zhang",
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Synthesis and properties of self-assembled ultralong core-shell Si3N4/SiO2 nanowires by catalyst-free technique. / Chen, Yang; Zhang, Chang; Wang, Ning; Jensen, Martin; Li, Xianfeng; Zhang, Xingxiang.

In: Ceramics International, Vol. 45, No. 16, 11.2019, p. 20040-20045.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Synthesis and properties of self-assembled ultralong core-shell Si3N4/SiO2 nanowires by catalyst-free technique

AU - Chen, Yang

AU - Zhang, Chang

AU - Wang, Ning

AU - Jensen, Martin

AU - Li, Xianfeng

AU - Zhang, Xingxiang

PY - 2019/11

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N2 - Self-assembled ultralong Si 3N 4/SiO 2 nanowires (SiNNWs) with core-shell structure are prepared by air jet-spinning followed by high-temperature calcination employing low-cost fumed nano silica and industrial polyacrylonitrile as raw materials. Without using metal catalysts or reductive atmosphere, Si 3N 4/SiO 2 nanowires are generated through autocatalysis and self-assembly. The ultralong SiNNWs are uniform and continuous throughout the entire length with a 3–4 nm amorphous SiO 2 shell layer on surface of the Si 3N 4. The diameter of the SiNNWs is about 80–200 nm with the length being at centimeter level and the main component of the SiNNWs is the standard hexagonal cell of α-Si 3N 4. Moreover, the photoluminescence spectrum of SiNNWs exhibits an intense blue-green light emission at room temperature. The self-assembly mechanism of the SiNNWs is discussed.

AB - Self-assembled ultralong Si 3N 4/SiO 2 nanowires (SiNNWs) with core-shell structure are prepared by air jet-spinning followed by high-temperature calcination employing low-cost fumed nano silica and industrial polyacrylonitrile as raw materials. Without using metal catalysts or reductive atmosphere, Si 3N 4/SiO 2 nanowires are generated through autocatalysis and self-assembly. The ultralong SiNNWs are uniform and continuous throughout the entire length with a 3–4 nm amorphous SiO 2 shell layer on surface of the Si 3N 4. The diameter of the SiNNWs is about 80–200 nm with the length being at centimeter level and the main component of the SiNNWs is the standard hexagonal cell of α-Si 3N 4. Moreover, the photoluminescence spectrum of SiNNWs exhibits an intense blue-green light emission at room temperature. The self-assembly mechanism of the SiNNWs is discussed.

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SN - 0272-8842

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