Fundamental Processes and Practical Considerations of Lead Chalcogenide Mesocrystals Formed via Self-Assembly and Directed Attachment of Nanocrystals at a Fluid Interface
Fundamental Processes and Practical Considerations of Lead Chalcogenide Mesocrystals Formed via Self-Assembly and Directed Attachment of Nanocrystals at a Fluid Interface
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通过纳米晶体在流体界面自组装和定向附着形成铅硫族化物介晶的基本过程和实际考虑
DOI：
10.1021/acs.chemmater.1c02910
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发表时间：
2021
影响因子：
8.6
通讯作者：
Hanrath, Tobias
中科院分区：
文献类型：
--
作者：
Cimada daSilva, Jessica;Balazs, Daniel M.;Dunbar, Tyler A.;Hanrath, Tobias
在胶体纳米晶体的合成和加工方面的重大进步使科学家和工程师能够访问具有精确定义的大小、形状和组成的庞大的构建块库。这些材料激发了令人兴奋的前景，使自下而上制造具有设计特性的可编程材料成为可能。要成功地将构建块组装并连接到组成纳米晶体可以有目的地相互作用的超结构中，需要对动态物理化学过程的复杂相互作用进行强有力的理解和控制。流体界面为探测和控制这些过程提供了有利的实验平台。尽管在流体界面上制造纳米晶体组件表面上看起来很简单，但对工艺条件的敏感性和有限的重复性突显了这一过程的复杂性。原位研究为溶剂扩散和蒸发、超晶格形成、配体脱离动力学和纳米晶体附着等关键子过程的竞争动力学提供了机制方面的见解。理解这些子过程是如何影响自组装、结构转换和定向依恋过程的复杂编排的，这是一个丰富的研究挑战。在此背景下，我们提出了一种在液-气界面上自组装和附着硫化物铅纳米晶的详细方法，作为制备单层和多层立方连接超晶格的模型系统。我们讨论了从胶体纳米晶注入到超晶格转移的关键实验参数，如构建块的特性和工艺条件以及详细的步骤。我们希望这篇方法/协议论文将为未来在实现基于纳米晶体的可编程材料的前景的激动人心的道路上的进展提供指导。
Significant advances in the synthesis and processing of colloidal nanocrystals have given scientists and engineers access to a vast library of building blocks with precisely defined size, shape, and composition. These materials have inspired exciting prospects to enable bottom-up fabrication of programmable materials with properties by design. Successfully assembling and connecting the building blocks into superstructures in which constituent nanocrystals can purposefully interact requires robust understanding of and control over a complex interplay of dynamic physicochemical processes. Fluid interfaces provide an advantageous experimental workbench to both probe and control these processes. Despite the ostensible simplicity of fabricating nanocrystal assemblies at a fluid interface, sensitivity to processing conditions and limited reproducibility have underscored the complexity of this process. In situ studies have provided mechanistic insights into the competing dynamics of key subprocesses including solvent spreading and evaporation, superlattice formation, ligand detachment kinetics, and nanocrystal attachment. Understanding how these subprocesses influence the complex choreography of self-assembly, structure transformation, and oriented attachment processes presents a rich research challenge. In this context, we present a detailed methodology for self-assembly and attachment of lead chalcogenide nanocrystals at a liquid–gas interface as a model system for the fabrication of mono- and multilayer cubic connected superlattices. We discuss key experimental parameters such as the characteristics of the building blocks and processing conditions and detailed steps from colloidal nanocrystal injection to superlattice transfer. We hope that this Methods/Protocols paper will provide guidance for future advances in the exciting path toward bringing the prospect of nanocrystal-based programmable materials to fruition.
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DOI：
10.1021/acs.chemmater.7b01103
发表时间：
2017-05-09
期刊：
Chemistry of materials : a publication of the American Chemical Society
影响因子：
--
作者：
Peters JL;van den Bos KHW;Van Aert S;Goris B;Bals S;Vanmaekelbergh D
通讯作者：
Vanmaekelbergh D
影响因子：
17.1
作者：
W. Walravens;J. De Roo;Emile Drijvers;Stephanie ten Brinck;E. Solano;J. Dendooven;C. Detavernier;I. Infante;Z. Hens
通讯作者：
W. Walravens;J. De Roo;Emile Drijvers;Stephanie ten Brinck;E. Solano;J. Dendooven;C. Detavernier;I. Infante;Z. Hens
影响因子：
10.8
作者：
Savitzky, Benjamin H.;Hovden, Robert;Kourkoutis, Lena F.
通讯作者：
Kourkoutis, Lena F.
影响因子：
10.8
作者：
Baumgardner, William J.;Whitham, Kevin;Hanrath, Tobias
通讯作者：
Hanrath, Tobias
GISAXS：评估嵌段共聚物薄膜结构和自组装动力学的多功能工具
影响因子：
3.4
作者：
D. Smilgies
通讯作者：
D. Smilgies