Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, PR China.
Nanoscale. 2017 Apr 6;9(14):4826-4834. doi: 10.1039/c7nr01047h.
Janus nanostructures that possess two or more distinct components and surface functions have attracted more and more attention. Here, we present a seed-shape defined growth mechanism for the preparation of anisotropic Janus nanostructures, in which the shape of periodic mesoporous organosilica (PMO) is determined by the shape of Au nanoparticles. Various shaped Au@PMO composite nanostructures, such as rods, spheres, and plates, are prepared based on this general growth mechanism. By adjusting the reaction parameters (temperature, surfactant), various shaped AuNR@PMO Janus nanostructures, including horsebean- and fingernail-like nanostructures, have been successfully prepared. We also demonstrate the potential applications of such composite nanostructures. As an example, the as-prepared rod-like Janus Au@PMO nanostructures show great performance in chemo-photothermal combination therapy because of the excellent photothermal effect of Au nanorods and the high surface area of PMO nanorods. This research may open a new direction to the controllable synthesis and practical application of dedicated nanostructures with desired properties.
具有两种或多种不同组分和表面功能的 Janus 纳米结构引起了越来越多的关注。在这里，我们提出了一种种子形状限定的生长机制，用于制备各向异性的 Janus 纳米结构，其中周期性介孔有机硅（PMO）的形状由金纳米粒子的形状决定。基于这种通用的生长机制，制备了各种形状的 Au@PMO 复合纳米结构，如棒、球和板。通过调整反应参数（温度、表面活性剂），成功制备了各种形状的 AuNR@PMO Janus 纳米结构，包括马豆状和指甲状纳米结构。我们还展示了这种复合纳米结构的潜在应用。例如，所制备的棒状 Janus Au@PMO 纳米结构由于 Au 纳米棒的优异光热效应和 PMO 纳米棒的高表面积，在化学-光热联合治疗中表现出优异的性能。这项研究可能为具有所需特性的专用纳米结构的可控合成和实际应用开辟新的方向。
