Multicomponent quantum nanostructures have attracted significant attention due to their potential applications in photovoltaics, optoelectronics and bioimaging. However, the preparation of anisotropic quaternary nanoheterostructures such as Cu–In–Zn–S(Se) (CIZS and CIZSe) is still very poorly explored and understood. Here, we report the synthesis and studies of NIR emissive CIZSe/CIZS/ZnS core/shell/shell nanoheterostructures with a unique hetero-nanonail (HNN) morphology. In our approach, wurtzite (WZ) CIZSe/CIZS core/shell QDs have been prepared by depositing a CIZS shell onto a previously synthesized chalcopyrite CIZSe QD core using a seeded growth technique. Following careful control of the ZnS shell growth resulted in the formation of the distinct nail-like CIZSe/CIZS/ZnS nanoheterostructure, where the CIZSe/CIZS core/shell QD is located near the “head” of the nail. The emission in the NIR region of the CIZSe/CIZS/ZnS nanocrystals is assigned to the CIZSe/CIZS core/shell quantum nanostructure. The CIZSe/CIZS/ZnS HNNs are particularly interesting due to a range of potential applications including bioimaging, biosensing, energy harvesting and NIR photodetectors. Finally, we also report the successful controlled growth of gold nanoparticles on the surface of the CIZSe/CIZS/ZnS nanonail-like heterostructure and the investigation of the resulting multimodal nanocomposites.

中文翻译：

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近红外发射CIZSe / CIZS / ZnS胶体异南酮结构。

多组分量子纳米结构由于其在光伏，光电和生物成像中的潜在应用而引起了广泛的关注。但是，对各向异性四元纳米异质结构（如Cu-In-Zn-S（Se）（CIZS和CIZSe））的制备仍非常缺乏探索和理解。在这里，我们报告具有独特的异nananoail（HNN）形态的近红外发射CIZSe / CIZS / ZnS核/壳/壳纳米异质结构的合成和研究。在我们的方法中，纤锌矿（WZ）CIZSe / CIZS核/壳QD是通过使用种子生长技术将CIZS壳沉积到先前合成的黄铜矿CIZSe QD核上而制备的。仔细控制ZnS壳的生长后，形成了独特的指甲状CIZSe / CIZS / ZnS纳米异质结构，CIZSe / CIZS核/壳QD位于钉子“头部”附近的位置。CIZSe / CIZS / ZnS纳米晶体在NIR区域的发射与CIZSe / CIZS核/壳量子纳米结构相关。CIZSe / CIZS / ZnS HNN尤其有趣，因为它具有一系列潜在的应用，包括生物成像，生物传感，能量收集和近红外光电探测器。最后，我们还报道了CIZSe / CIZS / ZnS纳米钉状异质结构表面上金纳米颗粒的成功受控生长以及对所得多峰纳米复合材料的研究。生物传感，能量收集和近红外光电探测器。最后，我们还报告了金纳米粒子在CIZSe / CIZS / ZnS纳米钉状异质结构表面上的成功受控生长以及对所得多峰纳米复合材料的研究。生物传感，能量收集和近红外光电探测器。最后，我们还报道了CIZSe / CIZS / ZnS纳米钉状异质结构表面上金纳米颗粒的成功受控生长以及对所得多峰纳米复合材料的研究。