Optical fiber sensor for pyrophosphate detection using Cu2+-responsive polymer-modified PbS quantum dots

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-09-13 DOI:10.1016/j.yofte.2025.104382

Siyu Wan , Shuang Zhou , Chenxi Wang , Deen Wang , Xiaolan Sun

引用次数: 0

Abstract

We report a compact optical fiber sensor for selective detection of pyrophosphate (PPi), based on a tapered interferometer coated with amphiphilic polymer-modified PbS quantum dots (P-QDs). The amphiphilic polymer enhances QD solubility and stability, while providing oxygen-rich groups for Cu²⁺ coordination. PPi competitively displaces Cu²⁺, leading to photoluminescence recovery and refractive index changes that yield a dual optical response. The sensor achieves a detection limit of 56.25 μM and excellent repeatability. Compared with conventional enzymatic or colorimetric assays, this fiber-integrated system offers operational simplicity, real-time monitoring capability, and robustness in complex aqueous environments. Beyond PPi, the P-QD/fiber platform provides a versatile framework for extending quantum-dot–based sensing to other biomedical and environmental analytes.

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基于Cu2+响应聚合物修饰PbS量子点的焦磷酸盐检测光纤传感器

我们报道了一种用于选择性检测焦磷酸盐（PPi）的紧凑型光纤传感器，该传感器基于涂有两亲性聚合物修饰的PbS量子点（P-QDs）的锥形干涉仪。两亲性聚合物提高了QD的溶解度和稳定性，同时为Cu2+配位提供了富氧基团。PPi竞争性地取代Cu2+，导致光致发光恢复和折射率变化，从而产生双光学响应。该传感器的检测限为56.25 μM，具有良好的重复性。与传统的酶法或比色法相比，这种光纤集成系统具有操作简单、实时监测能力和在复杂水环境中的稳健性。除了PPi之外，P-QD/光纤平台为将基于量子点的传感扩展到其他生物医学和环境分析提供了一个通用框架。

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

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.