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Luminescent metal clusters/barium sulfate composites for white light-emitting devices and anti-counterfeiting labels

机译:用于白光发射装置和防伪标签的发光金属簇/硫酸钡复合材料

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The applications of luminescent metal nanoclusters (NCs) in device fabrication have been greatly limited by their tough solidifying process and poor stability. In this work, we report the facile preparation of metal NCs/barium sulfate (BaSO4) composites by incorporating luminescent metal NCs into BaSO4 matrix by subsequent addition of Ba2+ and SO42? ions into the aqueous dispersions of the metal NCs. The resulting NCs/BaSO4 composites maintained the luminescent colour of the metal NCs and possessed improved stability under external stimuli, such as heating, strong acid and organic solvents. The solid metal NCs/BaSO4 composites with blue, green and red emissions were suitable for the fabrication of white light-emitting devices (WLEDs) and multicolour anti-counterfeiting labels.
机译:发光金属纳米团簇(NC)在器件制造中的应用由于其坚硬的固化过程和较差的稳定性而受到极大的限制。在这项工作中,我们报告了通过将发光金属NC掺入BaSO 4 中轻松制备金属NC /硫酸钡(BaSO 4 )复合材料的方法。依次添加Ba 2 + 和SO 4 2? 离子进入金属NCs的水分散体中。所得的NCs / BaSO 4 复合材料保持金属NCs的发光颜色,并在外部刺激(例如加热,强酸和有机溶剂)下具有改善的稳定性。具有蓝色,绿色和红色发光的固体金属NCs / BaSO 4 复合材料适用于制造白色发光器件(WLED)和多色防伪标签。

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