用于高效紫外检测和双模防伪的可光开关WO₃ ̄ₓQDs/Cu NCs复合薄膜

IF 3.3 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Qingmiao Mu, Jia Li, Hongxi Gu, Lijun Ren, Juan Du, Hualei Cheng and Dengwei Hu
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引用次数: 0

摘要

光开关荧光材料(PFMs)由于其非接触操作、清洁和非侵入性等固有优点而受到广泛关注。传统的PFMs制备工艺复杂,荧光开关性能差,受Föster共振能量转移(FRET)或光致电子转移(PET)机制的影响。采用溶液浇铸法在不同衬底上制备了WO3-x量子点/Cu NCs复合薄膜,由于WO3-x量子点的超光致变色性能和Cu NCs的聚集诱导荧光,显示出优异的荧光开关性能。该复合薄膜在紫外光照射和热处理下表现出基于内滤效应(IFE)机制的可逆性开/关可切换荧光。研究了复合膜的双模信号的动态变化规律,并分析了复合膜在紫外传感和防伪方面的应用。在紫外传感中实现了灵敏的双模检测,特别是对UVB的检测。该复合薄膜具有双模成像能力,具有良好的再现性和高分辨率,可用于安全信息加密和防伪。这项工作为制造用于多种光学应用的先进pfm提供了一种新的策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Photoswitchable WO3−x QD/Cu NC composite films for efficient UV detection and dual-mode anticounterfeiting†

Photoswitchable WO3−x QD/Cu NC composite films for efficient UV detection and dual-mode anticounterfeiting†

Photoswitchable fluorescent materials (PFMs) have attracted considerable attention owing to their intrinsic advantages of non-contact operation, cleanliness, and non-invasiveness. Conventional PFMs always require complicated preparation processes with poor fluorescence switching properties, which are affected by the Föster resonance energy transfer (FRET) or photoinduced electron transfer (PET) mechanism. Herein, WO3−x QD/Cu NC composite films were prepared on different substrates via a solution casting method and display outstanding fluorescence switching properties owing to the super photochromic performance of WO3−x QDs and aggregation-induced fluorescence of Cu NCs. The composite film exhibits reversible on/off switchable fluorescence under UV light irradiation and heat treatment based on the inner filter effect (IFE) mechanism. The composite film shows dynamic variations in dual-mode signals, and the applications of UV sensing and anti-counterfeiting are analyzed. Sensitive dual-mode detection is achieved in UV sensing, particularly for UVB. The composite film exhibits a dual-modal imaging capability with good reproducibility and high resolution for security information encryption and anti-counterfeiting. This work provides a novel strategy for fabricating advanced PFMs for multiple optical applications.

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来源期刊
Dalton Transactions
Dalton Transactions 化学-无机化学与核化学
CiteScore
6.60
自引率
7.50%
发文量
1832
审稿时长
1.5 months
期刊介绍: Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.
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