Precisely controlling the spatial organization of inorganic nanoparticles is essential for many applications, such as sensing, catalytic, and optical/electronic systems. Here, we describe a general and robust strategy to fabricate arbitrary quasi-two-dimensional (quasi-2D) nanoparticle assembly structures with tunable size and thickness on a substrate by using block copolymer brushes as the templates. To achieve this, patterned amphiphilic block copolymer brushes were first grown via light-mediated surface-initiated atom transfer radical polymerization. The hydrophilic polymer blocks could interact and enrich the inorganic precursors, and thus accelerate the in-situ growth of nanoparticles within the patterned hydrophilic polymer domains. In our method, the block copolymer template could strictly limit the vertical growth of quasi-2D nanoparticle assemblies to achieve thickness control in the nanometer scale. By changing the design of the photomask and experimental conditions for the light-mediated polymerization, quasi-2D inorganic nanoparticle assemblies with controllable shape and dimension can be feasibly obtained. Moreover, this method is also generally applicable to prepare various patterned inorganic nanoparticle assemblies with different compositions.

精确控制无机纳米粒子的空间组织对于许多应用至关重要，例如传感、催化和光学/电子系统。在这里，我们描述了一种通用且稳健的策略，通过使用嵌段共聚物刷作为模板，在基板上制造具有可调尺寸和厚度的任意准二维（准 2D）纳米粒子组装结构。为了实现这一点，首先通过光介导的表面引发的原子转移自由基聚合来生长图案化的两亲嵌段共聚物刷。亲水聚合物嵌段可以相互作用并富集无机前体，从而加速纳米颗粒在图案化亲水聚合物域内的原位生长。在我们的方法中，嵌段共聚物模板可以严格限制准二维纳米粒子组件的垂直生长，以实现纳米尺度的厚度控制。通过改变光介导聚合的光掩模设计和实验条件，可以获得形状和尺寸可控的准二维无机纳米粒子组件。此外，该方法也普遍适用于制备具有不同组成的各种图案化无机纳米粒子组件。