Supramolecular Gel-Templated In Situ Synthesis and Assembly of CdS Quantum Dots Gels.
Supramolecular Gel-Templated In Situ Synthesis and Assembly of CdS Quantum Dots Gels.
复制标题
DOI：
10.1186/s11671-016-1813-y
复制
发表时间：
2017-12
影响因子：
--
通讯作者：
Tao H
中科院分区：
文献类型：
--
作者：
Zhu L;He J;Wang X;Li D;He H;Ren L;Jiang B;Wang Y;Teng C;Xue G;Tao H
尽管许多研究试图开发将纳米颗粒 (NP) 自发组织成三维 (3D) 几何形状的策略，但这仍然是一个令人着迷的挑战。在这项研究中，展示了一种使用 Cd 超分子凝胶作为支架原位合成和自组装 CdS 量子点 (QD) 凝胶的方法。在量子点形成过程中，构成Cd凝胶的Cd离子作为CdS量子点的前驱体，与超分子凝胶中的Cd连接的油酸（OA）以羧酸盐的形式覆盖在CdS量子点的表面。通过胶凝剂和 H2S 之间的反应，在 Cd 凝胶的缠结自组装纤维网络 (SAFIN) 中原位合成了 OA 稳定的 CdS QD。结果，量子点精确地复制了 CdS QD 凝胶中 SAFIN 的框架，而不是简单地沿着超分子凝胶的 SAFIN 组装。此外，CdS QD 在 IO4 - 阴离子的荧光检测中表现出非凡的灵敏度。这里开发的简便的一步法是一种将纳米结构材料组装成 3D 结构的新方法，对低分子量凝胶剂的设计具有一般意义，从而为所开发的超分子凝胶带来所需的功能。本文的在线版本 (doi:10.1186/s11671-016-1813-y) 包含补充材料，可供授权用户使用。
Although many studies have attempted to develop strategies for spontaneously organizing nanoparticles (NPs) into three-dimensional (3D) geometries, it remains a fascinating challenge. In this study, a method for in situ synthesis and self-assembly of a CdS quantum dots (QDs) gel using a Cd supramolecular gel as a scaffold was demonstrated. During the QDs formation process, the Cd ions that constituted the Cd gels served as the precursors of the CdS QDs, and the oleic acid (OA) that ligated with the Cd in the supramolecular gels was capped on the surface of the CdS QDs in the form of carboxylate. The OA-stabilized CdS QDs were in situ synthesized in the entangled self-assembled fibrillar networks (SAFIN) of the Cd gels through reactions between the gelator and H2S. As a result, the QDs exactly replicated the framework of the SAFIN in the CdS QD gels instead of simply assembling along the SAFIN of the supramolecular gels. Moreover, the CdS QDs showed extraordinary sensitivity in the fluorescence detection of IO4 − anions. The facile one-step method developed here is a new approach to assembling nanostructured materials into 3D architectures and has general implications for the design of low molecular mass gelators to bring desired functionality to the developed supramolecular gels. The online version of this article (doi:10.1186/s11671-016-1813-y) contains supplementary material, which is available to authorized users.