Room-temperature aqueous synthesis of highly luminescent BaWO 4-polymer nanohybrids and their spontaneous conversion to hexagonal WO3 nanosheets

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Abstract

The synthesis of a highly luminescent barium tungstate polyacrylic acid (BaWO4-PAA) nanohybrid in aqueous solution at room temperature was performed. Hexagonal WO3 nanosheets spontaneously formed in the colloidal suspension of the resultant BaWO4-PAA. It was observed that the incorporation of carboxy groups in PAA molecules resulted in a coordination change from a WO4 tetrahedral structure to a WO6 octahedral. This structural modification induced enhanced green luminescence and the spontaneous conversion into metastable h-WO3 nanosheets. The results show that the coordination of electrolytes to the inorganic species can lead to the morphological evolution of crystals and can control the modification of the chemical structure relevant to the various optical and magnetic properties.

Original languageEnglish
Pages (from-to)1807-1811
Number of pages5
JournalAdvanced Materials
Volume18
Issue number14
DOIs
Publication statusPublished - 2006 Jul 18

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carbopol 940
Nanosheets
Polymers
Barium
Electrolytes
Luminescence
Magnetic properties
Suspensions
Optical properties
Temperature
Crystals
Molecules
Acids
tungstate

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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title = "Room-temperature aqueous synthesis of highly luminescent BaWO 4-polymer nanohybrids and their spontaneous conversion to hexagonal WO3 nanosheets",
abstract = "The synthesis of a highly luminescent barium tungstate polyacrylic acid (BaWO4-PAA) nanohybrid in aqueous solution at room temperature was performed. Hexagonal WO3 nanosheets spontaneously formed in the colloidal suspension of the resultant BaWO4-PAA. It was observed that the incorporation of carboxy groups in PAA molecules resulted in a coordination change from a WO4 tetrahedral structure to a WO6 octahedral. This structural modification induced enhanced green luminescence and the spontaneous conversion into metastable h-WO3 nanosheets. The results show that the coordination of electrolytes to the inorganic species can lead to the morphological evolution of crystals and can control the modification of the chemical structure relevant to the various optical and magnetic properties.",
author = "Yuya Oaki and Hiroaki Imai",
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AU - Oaki, Yuya

AU - Imai, Hiroaki

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N2 - The synthesis of a highly luminescent barium tungstate polyacrylic acid (BaWO4-PAA) nanohybrid in aqueous solution at room temperature was performed. Hexagonal WO3 nanosheets spontaneously formed in the colloidal suspension of the resultant BaWO4-PAA. It was observed that the incorporation of carboxy groups in PAA molecules resulted in a coordination change from a WO4 tetrahedral structure to a WO6 octahedral. This structural modification induced enhanced green luminescence and the spontaneous conversion into metastable h-WO3 nanosheets. The results show that the coordination of electrolytes to the inorganic species can lead to the morphological evolution of crystals and can control the modification of the chemical structure relevant to the various optical and magnetic properties.

AB - The synthesis of a highly luminescent barium tungstate polyacrylic acid (BaWO4-PAA) nanohybrid in aqueous solution at room temperature was performed. Hexagonal WO3 nanosheets spontaneously formed in the colloidal suspension of the resultant BaWO4-PAA. It was observed that the incorporation of carboxy groups in PAA molecules resulted in a coordination change from a WO4 tetrahedral structure to a WO6 octahedral. This structural modification induced enhanced green luminescence and the spontaneous conversion into metastable h-WO3 nanosheets. The results show that the coordination of electrolytes to the inorganic species can lead to the morphological evolution of crystals and can control the modification of the chemical structure relevant to the various optical and magnetic properties.

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