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Luminescent chemosensors based on semiconductor quantum dots

机译：基于半导体量子点的发光化学传感器

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Semiconductor quantum dots are inorganic nanoparticles with unique photophysical properties. In particular, their huge one- and two-photon absorption cross sections, tunable emission bands and excellent photobleaching resistances are stimulating the development of luminescent probes for biomedical imaging and sensing applications. Indeed, electron and energy transfer processes can be designed to switch the luminescence of semiconductor quantum dots in response to molecular recognition events. On the basis of these operating principles, the presence of target analytes can be transduced into detectable luminescence signals. In fact, luminescent chemosensors based on semiconductor quantum dots are starting to be developed to detect small molecules, monitor DNA hybridization, assess protein - ligand complementarities, test enzymatic activity and probe pH distributions. Although fundamental research is still very much needed to understand further the fundamental factors regulating the behavior of these systems and re. ne their performance, it is becoming apparent that sensitive probes based on semiconductor quantum dots will become invaluable analytical tools for a diversity of applications in biomedical research.
机译：半导体量子点是具有独特光物理性质的无机纳米粒子。特别是，它们巨大的一光子吸收和两光子吸收横截面，可调节的发射带以及出色的抗光漂白性正刺激着用于生物医学成像和传感应用的发光探针的发展。实际上，可以将电子和能量转移过程设计为响应于分子识别事件而切换半导体量子点的发光。根据这些操作原理，可以将目标分析物的存在转换为可检测的发光信号。实际上，基于半导体量子点的发光化学传感器已开始开发，以检测小分子，监测DNA杂交，评估蛋白质-配体的互补性，测试酶活性和探针pH分布。尽管仍然非常需要基础研究来进一步了解调节这些系统行为的基本因素。就其性能而言，基于半导体量子点的灵敏探针将成为在生物医学研究中广泛应用的宝贵分析工具，这一点已变得显而易见。

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