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Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light
An unconventional but facile approach to prepare size-tunable core/shell ferroelectric/polymeric nanoparticles with uniform distribution is achieved by metal-free atom transfer radical polymerization (ATRP) driven by visible light under ambient temperature based on novel hyperbranched aromatic polya...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6372659/ https://www.ncbi.nlm.nih.gov/pubmed/30755621 http://dx.doi.org/10.1038/s41598-018-38039-8 |
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author | You, Ning Zhang, Chenxi Liang, Yachao Zhang, Qi Fu, Peng Liu, Minying Zhao, Qingxiang Cui, Zhe Pang, Xinchang |
author_facet | You, Ning Zhang, Chenxi Liang, Yachao Zhang, Qi Fu, Peng Liu, Minying Zhao, Qingxiang Cui, Zhe Pang, Xinchang |
author_sort | You, Ning |
collection | PubMed |
description | An unconventional but facile approach to prepare size-tunable core/shell ferroelectric/polymeric nanoparticles with uniform distribution is achieved by metal-free atom transfer radical polymerization (ATRP) driven by visible light under ambient temperature based on novel hyperbranched aromatic polyamides (HBPA) as a functional matrix. Cubic BaTiO(3)/HBPA nanocomposites can be prepared by in-situ polycondensation process with precursors (barium hydroxide (Ba(OH)(2)) and titanium(IV) tetraisopropoxide (TTIP)) of ferroelectric BaTiO(3) nanocrystals, because precursors can be selectively loaded into the domain containing the benzimidazole rings. At 1200 °C, the aromatic polyamide coating of cubic BaTiO(3) nanoparticles are carbonized to form carbon layer in the inert environment, which prevents regular nanoparticles from gathering. In addition, cubic BaTiO(3) nanoparticles are simultaneously transformed into tetragonal BaTiO(3) nanocrystals after high temperature calcination (1200 °C). The outer carbon shell of tetragonal BaTiO(3) nanoparticles is removed via 500 °C calcination in air. Bi-functional ligand can modify the surface of tetragonal BaTiO(3) nanoparticles. PMMA polymeric chains are growing from the initiating sites of ferroelectric BaTiO(3) nanocrystal surface via the metal-free ATRP technique to obtain core/shell ferroelectric BaTiO(3)/PMMA hybrid nanoparticles. Changing the molar ratio between benzimidazole ring units and precursors can tune the size of ferroelectric BaTiO(3) nanoparticles in the process of polycondensation, and the thickness of polymeric shell can be tailored by changing the white LED irradiation time in the organocatalyzed ATRP process. The dielectric properties of core/shell BaTiO(3)/PMMA hybrid nanoparticles can be also tuned by adjusting the dimension of BaTiO(3) core and the molecular weight of PMMA shell. |
format | Online Article Text |
id | pubmed-6372659 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-63726592019-02-19 Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light You, Ning Zhang, Chenxi Liang, Yachao Zhang, Qi Fu, Peng Liu, Minying Zhao, Qingxiang Cui, Zhe Pang, Xinchang Sci Rep Article An unconventional but facile approach to prepare size-tunable core/shell ferroelectric/polymeric nanoparticles with uniform distribution is achieved by metal-free atom transfer radical polymerization (ATRP) driven by visible light under ambient temperature based on novel hyperbranched aromatic polyamides (HBPA) as a functional matrix. Cubic BaTiO(3)/HBPA nanocomposites can be prepared by in-situ polycondensation process with precursors (barium hydroxide (Ba(OH)(2)) and titanium(IV) tetraisopropoxide (TTIP)) of ferroelectric BaTiO(3) nanocrystals, because precursors can be selectively loaded into the domain containing the benzimidazole rings. At 1200 °C, the aromatic polyamide coating of cubic BaTiO(3) nanoparticles are carbonized to form carbon layer in the inert environment, which prevents regular nanoparticles from gathering. In addition, cubic BaTiO(3) nanoparticles are simultaneously transformed into tetragonal BaTiO(3) nanocrystals after high temperature calcination (1200 °C). The outer carbon shell of tetragonal BaTiO(3) nanoparticles is removed via 500 °C calcination in air. Bi-functional ligand can modify the surface of tetragonal BaTiO(3) nanoparticles. PMMA polymeric chains are growing from the initiating sites of ferroelectric BaTiO(3) nanocrystal surface via the metal-free ATRP technique to obtain core/shell ferroelectric BaTiO(3)/PMMA hybrid nanoparticles. Changing the molar ratio between benzimidazole ring units and precursors can tune the size of ferroelectric BaTiO(3) nanoparticles in the process of polycondensation, and the thickness of polymeric shell can be tailored by changing the white LED irradiation time in the organocatalyzed ATRP process. The dielectric properties of core/shell BaTiO(3)/PMMA hybrid nanoparticles can be also tuned by adjusting the dimension of BaTiO(3) core and the molecular weight of PMMA shell. Nature Publishing Group UK 2019-02-12 /pmc/articles/PMC6372659/ /pubmed/30755621 http://dx.doi.org/10.1038/s41598-018-38039-8 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article You, Ning Zhang, Chenxi Liang, Yachao Zhang, Qi Fu, Peng Liu, Minying Zhao, Qingxiang Cui, Zhe Pang, Xinchang Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light |
title | Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light |
title_full | Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light |
title_fullStr | Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light |
title_full_unstemmed | Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light |
title_short | Facile Fabrication of Size-Tunable Core/Shell Ferroelectric/Polymeric Nanoparticles with Tailorable Dielectric Properties via Organocatalyzed Atom Transfer Radical Polymerization Driven by Visible Light |
title_sort | facile fabrication of size-tunable core/shell ferroelectric/polymeric nanoparticles with tailorable dielectric properties via organocatalyzed atom transfer radical polymerization driven by visible light |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6372659/ https://www.ncbi.nlm.nih.gov/pubmed/30755621 http://dx.doi.org/10.1038/s41598-018-38039-8 |
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