Solid-phase colorimetric sensor for hypochlorite,Analyst

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Solid-phase colorimetric sensor for hypochlorite
Analyst ( IF 3.6 ) Pub Date : 2021-2-15 , DOI: 10.1039/d0an02448a
Lee Wonjung _{1,

2,

3} , Hyunho Youn _{1,

2,

3} , Jinyoung Bae _{1,

2,

3} , Dong-Hwan Kim _{1,

2,

2,

3,

4}

Affiliation

By taking advantage of the powerful oxidation property of hypochlorite (OCl⁻), we developed a solid-phase colorimetric sensor for the detection of OCl⁻ based on 13 nm AuNPs immobilized on a 3-aminopropyltriethoxysilane APTES-coated substrate. This colorimetric sensor utilizes the aggregation and anti-aggregation properties of AuNPs arising from the interaction between dithiothreitol (DTT) and OCl⁻. When the amount of OCl⁻ increases, the color of the substrate changes from blue to red, allowing for naked-eye detection at concentrations as low as 2.48 μM within the reaction time of 5 minutes. Unlike conventional solution-based colorimetric sensors that can be easily affected by ionic strength, pH values, and temperature, this solid-phase sensor shows a more stable detection performance. Additionally, this solid-phase sensor can be further miniaturized, providing high availability and durability for use in daily life.

中文翻译：

次氯酸盐固相比色传感器

通过取次氯酸盐（OCL的强大氧化性能的优点^-），我们开发用于检测OCL的固相比色传感器^-基于固定在3-氨丙基三APTES涂覆基底上为13nm金纳米粒子。这个比色传感器利用从二硫苏糖醇（DTT）和OCL之间的相互作用而产生的AuNP的聚集和抗聚集性质^-。当OCl的量^-增加时，底物的颜色从蓝色变为红色，可以在5分钟的反应时间内以低至2.48μM的浓度进行肉眼检测。与传统的基于溶液的比色传感器很容易受到离子强度，pH值和温度的影响不同，该固相传感器显示出更稳定的检测性能。另外，该固相传感器可以进一步小型化，为日常使用提供高可用性和耐用性。

更新日期：2021-02-23

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