Upconversion circularly polarized luminescence of cholesteric liquid crystal polymer networks with NaYF₄:Yb,Tm UCNPs.

IF 12.2 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Materials Horizons Pub Date : 2024-10-10 DOI:10.1039/d4mh00966e

Liting Xu, Yi Li, Wei Liu, Yonggang Yang

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Abstract

Upconversion circularly polarized luminescence (UC-CPL) exhibits promising potential for application for anti-counterfeiting and displays. Upconversion nanoparticles (UCNPs), NaYF₄:Yb,Tm, with uniform morphology and high crystallinity, were prepared via a simple solvothermal method. These UCNPs were embedded into cholesteric liquid crystal polymer network (CLCN) films. The UC-CPL performance of these films was investigated using left- and right-handed circular polarizers. After calibration, the |gcallum| values (up to 0.33) were obtained for the free-standing CLCN-UCNPs films, while a |gcallum| value of 0.43 was achieved for the CLCN-UCNPs-coated PET film. Moreover, a combined system comprising a PMMA-UCNPs layer and a CLCN layer yielded an ultra-large |gcallum| value of up to 1.73. Flexible and colourful patterned CLCN films were fabricated using photomasks, offering potential applications in anti-counterfeiting. This study not only successfully prepared UC-CPL-active materials based on CLCNs and UCNPs, but also demonstrated the chiral filtering effect of CLCN films in upconversion luminescent materials.

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含有 NaYF4:Yb,Tm UCNPs 的胆甾液晶聚合物网络的上转换圆偏振发光。

上转换圆偏振发光（UC-CPL）在防伪和显示领域具有广阔的应用前景。上转换纳米粒子（UCNPs）NaYF4:Yb,Tm 具有均匀的形态和高结晶度，是通过一种简单的溶热法制备的。这些 UCNPs 被嵌入到胆甾型液晶聚合物网络（CLCN）薄膜中。使用左旋和右旋圆偏振器研究了这些薄膜的 UC-CPL 性能。经过校准，独立的 CLCN-UCNPs 薄膜的|gcallum|值（高达 0.33），而 CLCN-UCNPs 涂层 PET 薄膜的|gcallum|值则达到了 0.43。此外，由 PMMA-UCNPs 层和 CLCN 层组成的组合系统产生了高达 1.73 的超大|gcallum|值。使用光掩膜制备出了柔韧的彩色图案 CLCN 薄膜，有望应用于防伪领域。这项研究不仅成功制备了基于 CLCNs 和 UCNPs 的 UC-CPL 活性材料，还证明了 CLCN 薄膜在上转换发光材料中的手性过滤效应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

18.90

自引率

2.30%

发文量

306

审稿时长

1.3 months

期刊介绍： Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.

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Inside back cover Back cover Efficient photodegradation of carbamazepine by organocatalysts incorporating a third component with a more complementary absorption spectrum. Upconversion circularly polarized luminescence of cholesteric liquid crystal polymer networks with NaYF₄:Yb,Tm UCNPs. Dopamine-integrated all-hydrogel multi-electrode arrays for neural activity recording.