Chain-End Functionalized Polymers for the Controlled Synthesis of Sub-2 nm Particles
Chain-End Functionalized Polymers for the Controlled Synthesis of Sub-2 nm Particles
复制标题
DOI：
10.1021/jacs.0c02244
复制
发表时间：
2020-04-22
影响因子：
15
通讯作者：
Mirkin, Chad A.
中科院分区：
文献类型：
--
作者：
Chen, Peng-Cheng;Liu, Yuan;Mirkin, Chad A.
描述了一种在衬底上合成均匀亚2nm粒子阵列的新方法。这种粒子是通过(i)使用浸笔纳米光刻技术制备由金属配位聚合物组成的纳米反应器制备的；（ii）设计每条聚合物链上只有一个金属原子的聚合物；（iii）系统地将纳米反应器的体积控制到10升；（四）通过热退火将每个纳米反应器转化为金属纳米颗粒。在这项研究中，聚合物设计是至关重要的，因为它允许人们通过调整聚合物反应器的体积来严格控制纳米颗粒的大小，这与聚合物链的数量以及金属原子的数量有关。采用不同金属功能化聚合物的混合物合成了超小合金颗粒。本文描述的技术和结果指出了一种使用这些新型聚合物系统地探索这类重要纳米材料在许多领域的性质和用途的方法。
A novel method for synthesizing arrays of uniform sub-2 nm particles on substrates is described. Such particles are made by (i) using dip-pen nanolithography to prepare nanoreactors consisting of metal-coordinated polymers; (ii) designing polymers with only one metal atom attached to each polymer chain; (iii) systematically controlling nanoreactor volume down to the yoctoliter scale; and (iv) transforming each nanoreactor into a metal nanoparticle through thermal annealing. Polymer design in this study is crucial, since it allows one to tightly control nanoparticle size by tuning the volume of the polymer reactors, which correlates with the number of polymer chains and, therefore, metal atoms. Mixtures of different metal-functionalized polymers were used to synthesize ultrasmall alloy particles. The technique and results described herein point toward a way of using these novel polymers to systematically explore the properties and uses of this important class of nanomaterials in many fields.