Real-time fluorescent detection of food spoilage with doped quantum dots-anchored hydrogel sensor

IF 9 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Chenying Li, Jianzhong Li, Lei Ji, Yibin Zhu, Jiajia Liu, Jiatao Zhang
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Abstract

Spermine assumes a pivotal role in assessing food safety due to its potential to induce a spectrum of diseases upon excessive consumption. However, contemporary spermine detection methodologies, exemplified by high-performance liquid chromatography (HPLC), demand costly instrumentation and the expertise of skilled technicians. To address this challenge, the study introduces a portable fluorescence sensing platform. Ratiometric fluorescent probes were realized through the utilization of CdS quantum dots deeply doped with Ag+ (CdS:Ag QDs) and nitrogen-doped carbon quantum dots (N-CQDs). Hydrogen bonds formed between CdS:Ag QDs and spermine result in the formation of the assembly and the decreasing of the fluorescence intensity. In an effort to broaden the applicative scope and streamline deployment processes, fluorescent sensing hydrogels were meticulously engineered, capitalizing on the swelling properties inherent in polyvinyl alcohol (PVA) hydrogels. The systematic delineation of the correlation between 1 − R/B and spermine concentration facilitates the quantitative determination of spermine concentration. The incorporation of this composite construct serves to alleviate environmental influences on the probes, thereby augmenting their precision. The portable fluorescent sensing platform proves pivotal in expeditiously measuring spermine concentration within the fluorescent sensing hydrogel, enabling a quantitative assessment of pork freshness. The utilization of this platform for food freshness evaluation imparts the benefits of convenience, cost-effectiveness, and intuitive operation.

掺杂量子点锚定水凝胶传感器实时荧光检测食品腐败
精胺在评估食品安全方面发挥着关键作用,因为它有可能在过量食用后诱发一系列疾病。然而,以高效液相色谱(HPLC)为例的当代精胺检测方法需要昂贵的仪器和熟练的技术人员的专业知识。为了解决这一挑战,该研究引入了一种便携式荧光传感平台。利用深度掺杂Ag+的CdS量子点(CdS:Ag量子点)和氮掺杂的碳量子点(N-CQDs)实现了比例荧光探针。在CdS:Ag量子点和精胺之间形成氢键,导致组装体的形成和荧光强度的降低。为了扩大应用范围和简化部署过程,荧光传感水凝胶经过精心设计,充分利用聚乙烯醇(PVA)水凝胶固有的膨胀特性。系统地描述了1 - R/B与精胺浓度之间的关系,有助于精胺浓度的定量测定。这种复合结构的结合有助于减轻环境对探针的影响,从而提高其精度。便携式荧光传感平台在荧光传感水凝胶中快速测量精胺浓度,实现猪肉新鲜度的定量评估方面发挥了关键作用。利用该平台进行食品新鲜度评价具有方便、性价比高、操作直观等优点。
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来源期刊
Nano Research
Nano Research 化学-材料科学:综合
CiteScore
14.30
自引率
11.10%
发文量
2574
审稿时长
1.7 months
期刊介绍: Nano Research is a peer-reviewed, international and interdisciplinary research journal that focuses on all aspects of nanoscience and nanotechnology. It solicits submissions in various topical areas, from basic aspects of nanoscale materials to practical applications. The journal publishes articles on synthesis, characterization, and manipulation of nanomaterials; nanoscale physics, electrical transport, and quantum physics; scanning probe microscopy and spectroscopy; nanofluidics; nanosensors; nanoelectronics and molecular electronics; nano-optics, nano-optoelectronics, and nano-photonics; nanomagnetics; nanobiotechnology and nanomedicine; and nanoscale modeling and simulations. Nano Research offers readers a combination of authoritative and comprehensive Reviews, original cutting-edge research in Communication and Full Paper formats. The journal also prioritizes rapid review to ensure prompt publication.
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