Precise Engineering of Nanocrystal Shells via Colloidal Atomic Layer Deposition
Precise Engineering of Nanocrystal Shells via Colloidal Atomic Layer Deposition
复制标题
DOI：
10.1021/acs.chemmater.7b01873
复制
发表时间：
2017-08
影响因子：
8.6
通讯作者：
E. Slejko;V. Sayevich;Bin Cai;N. Gaponik;V. Lughi;V. Lesnyak;A. Eychmüller
中科院分区：
文献类型：
--
作者：
E. Slejko;V. Sayevich;Bin Cai;N. Gaponik;V. Lughi;V. Lesnyak;A. Eychmüller
我们提出了一种通过胶体原子层沉积（c-ALD）快速合成复杂多功能纳米材料的一般策略。c-ALD技术是基于室温下纳米晶体（NC）表面离子前驱体的自限制半反应。利用该技术，在具有不同壳层组合的CdSe半导体芯上外延生长了均匀的CdS和ZnS半导体壳层，从而精确控制了这些异质结构的光学特性。所有的核壳多组分纳米颗粒都保持了初始纳米颗粒的窄尺寸分布、相结晶度和形状均匀性。此外，我们试图扩展c-ALD的工具箱，以组合具有本质不同性质的材料，例如具有大量晶格不匹配的Au/CdS核/壳结构。这项工作的结果表明，为电子工业制造具有可编程特性的功能材料提供了巨大的机会。
We present a general strategy for a facile synthesis of complex multifunctional nanoscale materials via colloidal atomic layer deposition (c-ALD). The c-ALD technique is based on self-limiting half-reactions of ionic precursors on the surface of a nanocrystal (NC) occurring at room temperature. Using this technique, uniform layers of CdS and ZnS semiconductor shells were epitaxially grown on CdSe semiconductor cores with different shell combinations, leading to the precise control of the optical properties of these heterostructures. All core–shell multicomponent nanoparticles preserve narrow size distributions, phase crystallinity, and shape homogeneity of the initial NCs. Furthermore, we attempted to extend the toolbox of the c-ALD to combine materials with intrinsically different properties, such as Au/CdS core/shell structures with substantial lattice mismatch. The results presented in this work demonstrate great opportunities for creating functional materials with programmable properties for electroni...