The rational design of robust photoactive material and artful sensing strategy are vital for the construction of an ultrasensitive photoelectrochemical (PEC) sensor. Although great progress has been made in PEC sensing, the resultant detection performances and adoptable sensing strategies are still limited. Herein, through the design of a subtle component reconstitution strategy, an ultrasensitive PEC sensor is developed for the detection of Cu²⁺ based on advanced CuS/CdS nanohybrids (NHs). This proposed sensor shows superior sensing performances with a low detection limit of 0.1 nM and a wide detection range from 0.2 nM to 60 µM due to the formation of p-n junction between CuS and CdS and the component transformation of CdS to Cu_xS (x = 1,2). Moreover, such PEC sensor also displays goodish results for monitoring the Cu²⁺ released from apoptotic HeLa cells in vitro. This idea of component reconstitution provides a new paradigm for the design of advanced PEC sensors.

中文翻译：

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基于高级CuS / CdS pn结的成分重构驱动的光电化学传感器，用于敏感地检测Cu 2+

健壮的光敏材料的合理设计和巧妙的传感策略对于构建超灵敏的光电化学（PEC）传感器至关重要。尽管在PEC感测方面取得了很大的进步，但最终的检测性能和可采用的感测策略仍然受到限制。在本文中，通过设计微妙的成分重构策略，开发了一种基于先进CuS / CdS纳米杂化物（NHs）的用于检测Cu ²⁺的超灵敏PEC传感器。由于CuS和CdS之间的pn结形成以及CdS向Cu _x S（x= 1,2）。此外，这种PEC传感器还显示出良好的结果，用于监测体外从凋亡的HeLa细胞释放的Cu ²⁺。组件重构的思想为高级PEC传感器的设计提供了新的范例。