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Open AccessArticle

Fluorescent and Mechanical Properties of Silicon Quantum Dots Modified Sodium Alginate-Carboxymethylcellulose Sodium Nanocomposite Bio-Polymer Films

1
College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China
2
Ministry of Education Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, Xi’an 710127, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(9), 1476; https://doi.org/10.3390/polym11091476
Received: 16 July 2019 / Revised: 27 August 2019 / Accepted: 2 September 2019 / Published: 9 September 2019
(This article belongs to the Special Issue Biopolymers and Biobased Polymers: Chemistry and Engineering)
Highly luminescent silicon quantum dots (SiQDs) were prepared via one-pot hydrothermal route. Furthermore, the optimal synthetic conditions, dependence of the emission spectrum on the excitation wavelength and fluorescent stability of SiQDs were investigated by fluorescence spectroscopy. SiQDs exhibited bright blue fluorescence, and photoluminescence (PL) lifetime is 10.8 ns when excited at 325 nm. The small-sized SiQDs (~3.3 nm) possessed uniform particle size, crystal lattice spacing of 0.31 nm and silicon (111), (220) crystal planes. Luminescent SiQDs/sodium alginate (SA)-carboxymethylcellulose sodium (CMC) nanocomposite bio-polymer films were successfully fabricated by incorporating SiQDs into the SA-CMC matrix. Meanwhile, SiQDs not only impart strong fluorescence to the polymer, but also make the composite films have favorable toughness. View Full-Text
Keywords: biopolymer; silicon quantum dots; nanocomposite polymer films; fluorescent; mechanical property biopolymer; silicon quantum dots; nanocomposite polymer films; fluorescent; mechanical property
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MDPI and ACS Style

Ji, Y.; Zhang, H.; Zhang, C.; Quan, Z.; Huang, M.; Wang, L. Fluorescent and Mechanical Properties of Silicon Quantum Dots Modified Sodium Alginate-Carboxymethylcellulose Sodium Nanocomposite Bio-Polymer Films. Polymers 2019, 11, 1476.

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