食物腐败
荧光
比色法
硫化锌
铕
锌
食品包装
化学
异质结
纳米技术
材料科学
发光
食品科学
光电子学
有机化学
生物
色谱法
物理
遗传学
量子力学
细菌
作者
Mengzhen Zhao,Wen Zhong,Jiaheng Chen,Yuqing He,Zhibin Zhou,Dan Deng,Suai Lin,Haoxin Cheng,Xiaotian Hu,Xiaolei Wang
出处
期刊:Small
[Wiley]
日期:2025-02-13
卷期号:21 (11): e2410401-e2410401
被引量:16
标识
DOI:10.1002/smll.202410401
摘要
Spoiled food has significantly impacted the global economy and public health, which increases worldwide concern about monitoring and preserving food freshness. Herein, a multi-functional type-I heterojunction (Eu@ZMC) is designed by europium metal-organic framework (EuMOF), zinc oxide quantum dots (ZnO QDs), and chlorogenic acid (CGA). Eu@ZMC achieves ratiometric fluorescent/colorimetric sensing of pH and biogenic amines to detect freshness. Besides, a paper-based platform (PEu@ZMC) is prepared and can detect histamine with the LOD of 0.0142 and 0.0136 µg mL-1 in fluorescent and colorimetric modes, respectively. An advanced OR/NOT-gate logic device is further constructed to distinguish freshness into three levels (fresh, less fresh, and spoiled). This dual-mode sensor is synergistic-enhanced by the energy transfer triggered by ZnO QDs-promoted colorimetry and the type-I heterostructure of fluorescent EuMOF and ZnO QDs. The release of low-toxic zinc ions inhibits various bacterial growth, including Salmonella typhimurium. According to raw fish evaluation, Eu@ZMC not only effectively monitors spoilage externally and internally aligning with a commercial kit, but also reduces spoilage speed, which cannot be achieved through the classical detection strategy. This original work provides a simple, convenient, and reliable method for multi-depth and real-time visual food monitoring with extract freshness preservation, contributing to economic benefits and human health assurance.
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