Abstract

Traditional analytical methods are bounded due to required high consumption of reagents, time, expensive equipment and complicated sample preparation. Thus, there is a demand for easy, fast and sensitive procedure to determine various analytes. In this regards, quantum dots (QDs) as fluorescent nanomaterials have attracted considerable attention due to their unique optical properties. Numerous studies have been reported regarding the application of QDs in sensor development for the detection of different analytes. Moreover, mesoporous silica nanoparticles which show ideal properties including biocompatibility, uniform pore size, stability in wide range of pH and an extremely high surface area could offer great opportunity in combination with QDs for the construction of sensing platforms. The fluorescent, chemiluminescent and electrochemical sensors based on silica-QDs materials could be used for the quantitative recognition of an extensive range of analytes like organic compounds, metal cations, toxic industrial compounds, drugs, and biogenic composites. In this review, we have summarized sensors based on combined QD-silica nanomaterials and their applications in the recognition of different analytes which are published over approximately the past five years.

摘要

传统的分析方法由于需要大量的试剂、时间、昂贵的设备和复杂的样品制备而受到限制。因此，需要简单、快速和灵敏的方法来测定各种分析物。在这方面，作为荧光纳米材料的量子点（QDs）由于其独特的光学特性而引起了相当大的关注。已经报道了许多关于 QD 在传感器开发中应用以检测​​不同分析物的研究。此外，介孔二氧化硅纳米粒子显示出理想的特性，包括生物相容性、均匀的孔径、在宽 pH 值范围内的稳定性和极高的表面积，可以为与 QD 结合构建传感平台提供巨大的机会。荧光的，基于二氧化硅量子点材料的化学发光和电化学传感器可用于定量识别各种分析物，如有机化合物、金属阳离子、有毒工业化合物、药物和生物复合材料。在这篇综述中，我们总结了基于组合 QD-二氧化硅纳米材料的传感器及其在识别不同分析物方面的应用，这些应用大约在过去五年中发表。