Electron Dose-Controlled Formation, Growth, and Assembly of Nanoclusters and Nanoparticles from Aurophilic Au(I)–Thiolate Ensemble on Surfaces
Electron Dose-Controlled Formation, Growth, and Assembly of Nanoclusters and Nanoparticles from Aurophilic Au(I)–Thiolate Ensemble on Surfaces
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表面上亲金 Au(I)–硫醇盐整体的电子剂量控制的纳米团簇和纳米颗粒的形成、生长和组装
DOI：
10.1021/acsami.8b17941
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发表时间：
2018
影响因子：
9.5
通讯作者：
Chuan Jian Zhong
中科院分区：
文献类型：
--
作者：
Han Wen Cheng;Shan Yan;Jing Li;Jie Wang;Lingyan Wang;Zakiya Skeete;Shiyao Shan;Chuan Jian Zhong
精确控制电子辐照诱导的纳米团簇或纳米颗粒在固体表面的形成、生长和组装的能力对于设计和创建没有化学还原剂的催化或化学活性表面位置和界面非常重要。在这里，我们展示了电子剂量控制的纳米团簇和纳米颗粒在分子组装的薄膜中形成、生长和组装的研究结果，强调了在控制电子剂量下的形态演变的原位监测。由于Au(I)-硫酸盐的亲金基序受到静电相互作用的限制，Au纳米团簇和纳米颗粒的尺寸随着电子剂量的增加而增大，显示出生长的纳米团簇和纳米颗粒有串排列的倾向。这种对一维组装的生长偏好得到了表面反应动力学的支持，表面反应动力学是根据纳米团簇和纳米颗粒生长的电子剂量表面密度进行的。电子剂量控制纳米团簇和纳米颗粒的尺寸聚焦和定向组装可以作为精确控制纳米团簇或纳米颗粒及其在固体表面的组装的新策略，不仅不需要化学还原剂，而且能够直观地监测生长过程中的形态演变。
The ability to precisely control electron irradiation-induced formation, growth, and assembly of nanoclusters or nanoparticles on a solid surface is important for design and creation of catalytically or chemically active surface sites and interfaces free from chemical reducing agents. Here, we show the results of an investigation of the electron dose-controlled formation, growth, and assembly of nanoclusters and nanoparticles in a molecularly assembled thin film of Au(I)–thiolate motifs on a substrate, highlighting an in situ monitoring of the evolution of morphology under controlled electron dose. With aurophilic motifs of Au(I)–thiolate being confined by electrostatic interactions, the sizes of Au nanoclusters and nanoparticles were shown to increase with electron dose, revealing a propensity of a string alignment of the grown nanoclusters and nanoparticles. This growth preference to one-dimensional assembly is supported by the analysis of the surface reaction kinetics in terms of the surface density of electron dose for the growth of the nanoclusters and nanoparticles. The electron dose-controlled size-focusing and directional assembly of nanoclusters and nanoparticles may be exploited as new strategy for the precise control of nanoclusters or nanoparticles and their assemblies on solid surfaces not only free from chemical reducing agent but also with the ability of visual monitoring of the morphological evolution during growth.