writer：Xuan Yue, Xuejie Liu, Nan Yan, Wei Jiang
keywords：金纳米棒, 胶体体, 乳液界面, 自组装, 有序排列, 分级超结构
source：期刊
specific source：The Journal of Physical Chemistry C, 2020, 124(37), 20458-20468
Issue time：2020年

摘要：将金纳米棒（AuNRs）自组装成分级有序的超结构，是制造功能材料和器件的前提。尽管已成功构建AuNRs的一维线性和二维片状有序阵列，但由于在曲面上控制各向异性AuNRs取向困难，将AuNRs组织成三维球面有序阵列仍具挑战。本文报道了一种简便而稳健的乳液界面自组装策略，通过聚合物修饰AuNRs在乳液界面自组装，获得具有高度有序和定向排列AuNRs的规整胶体体（colloidosomes），该乳液由外部水溶液和内部非溶剂（十六烷）作为液核模板构成。此外，可通过改变胶体体曲率、AuNRs长度和聚合物配体分子量控制AuNRs的对齐和取向。该策略为设计具有可控AuNR排列和取向的分级超结构提供了有前景的途径。

Abstract：Self-assembly of gold nanorods (AuNRs) into hierarchically ordered superstructures is a prerequisite for the fabrication of functional materials and devices. Although 1D linear and 2D sheetlike ordered arrays of AuNRs have been successfully constructed, organizing AuNRs into ordered arrays on 3D spherical surfaces is still quite challenging because of the difficulty in controlling the orientation of anisotropic AuNRs on curved surfaces. Here, a facile yet robust emulsion interface self-assembly strategy is reported to obtain well-defined colloidosomes with highly ordered and oriented AuNRs through the self-assembly of polymer-tethered AuNRs at the emulsion interface, which is constructed with an external aqueous solution and an internal nonsolvent (hexadecane) as a liquid-core template. Moreover, the alignment and orientation of AuNRs can be controlled by varying the curvature of the colloidosome, the length of the AuNRs, and the molecular weight of the polymer ligands. This strategy provides a promising route to the design of hierarchical superstructures with a controlled AuNR arrangement and orientation.

论文链接：https://doi.org/10.1021/acs.jpcc.0c06162