A facile strategy for the controllable growth of CdS nanoparticles at the periphery of MoS₂ en route the preparation of electron donor‐acceptor nanoensembles is developed. Precisely, the carboxylic group of α‐lipoic acid, as addend of the modified MoS₂ obtained upon 1,2‐dithiolane functionalization, was employed as anchor site for the in situ preparation and immobilization of the CdS nanoparticles in an one‐pot two‐step process. The newly prepared MoS₂/CdS hybrid material was characterized by complementary spectroscopic, thermal and microscopy imaging means. Absorption spectroscopy was employed to register the formation of MoS₂/CdS, by observing a broad shoulder centered at 420 nm due to CdS nanoparticles, while the excitonic bands of MoS₂ were also evident. Moreover, based on the efficient quenching of the characteristic fluorescence emission of CdS at 725 nm by the presence of MoS₂, strong electronic interactions at the excited state between the two species within the ensemble were identified. Photoelectrochemical assays of MoS₂/CdS thin‐film electrodes revealed a prompt, steady and reproducible anodic photoresponse during repeated on‐off cycles of illumination. A significant zero‐current photopotential of −540 mV and an anodic photocurrent of 1 μA were observed, underlining improved charge‐separation and electron transport from CdS to MoS₂. The superior performance of the charge‐transfer processes in MoS₂/CdS is of direct interest for the fabrication of photoelectrochemical and optoelectronic devices.

中文翻译：

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CdS纳米粒子的原位生长和固定化到功能化的MoS2上：光电化学电池的制备，表征和制备。

开发了一种在MoS ₂外围可控地生长CdS纳米粒子的可行策略，该路径可用于制备电子供体-受体纳米集合体。精确地讲，α-硫辛酸的羧基作为1,2-二硫杂环戊烷官能化后得到的修饰MoS _2的加成基团，被用作原位制备和固定CdS纳米粒子在一锅两锅中的锚定位点。步骤过程。新制备的MoS ₂ / CdS杂化材料通过互补光谱，热成像和显微镜成像手段进行了表征。吸收光谱法用于记录MoS ₂的形成/ CdS，通过观察由于CdS纳米颗粒而位于420 nm处的宽肩，而MoS ₂的激子谱带也很明显。此外，基于MoS ₂的存在，CdS在725 nm处的特征荧光发射得到了有效的猝灭，确定了该集合中两个物种之间在激发态下的强电子相互作用。MoS ₂ / CdS薄膜电极的光电化学测定表明，在重复的照明开-关循环中，阳极光响应迅速，稳定且可重现。观察到显着的零电流光势为-540 mV，阳极光电流为1μA，突显了电荷分离和从CdS到MoS _2的电子传输的改善。。MoS ₂ / CdS中电荷转移过程的卓越性能直接引起了光电化学和光电器件的制造兴趣。