Cimrová Věra, Eom Sangwon, Pokorná Veronika, Kang Youngjong, Výprachtický Drahomír
Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky Sq. 2, 162 06 Prague, Czech Republic.
Department of Chemistry, Hanyang University, Seoul 04763, Korea.
Polymers (Basel). 2021 Jan 29;13(3):439. doi: 10.3390/polym13030439.
Hybrid layers of donor-acceptor (D-A) copolymers containing -dialkylperylene-3,4,9,10-tetracarboxydiimide electron-acceptor units covered with silver nanoparticles (Ag-NPs) were prepared by electrochemical doping of pristine layers during reduction processes. In situ optical absorption spectra of the layers were recorded during the formation of Ag-NP coverage. The hybrid layers were characterized by absorption spectroscopy, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and energy dispersive X-ray spectroscopy (EDX). In the absorption spectra of the hybrid layers, a surface plasmon band characteristic of Ag-NPs appeared. Significant improvements in light absorption due to the plasmonic effects of Ag NPs were observed. Stable Ag-NPs with an average diameter of 41-63 nm were formed on the surface, as proven by SEM and XPS. The Ag-NP coverage and size depended on the hybrid layer preparation conditions and on the copolymer composition. The metallic character of the Ag-NPs was proven by XPS. The location in the surface layer was further confirmed by EDX analysis. To the best of our knowledge, this is the first report on such hybrid layers having the potential for a variety of photonic and electronic applications.
通过在还原过程中原位层的电化学掺杂，制备了含有-二烷基苝-3,4,9,10-四羧酸二酰亚胺电子受体单元并覆盖有银纳米颗粒（Ag-NPs）的供体-受体（D-A）共聚物混合层。在形成Ag-NP覆盖层的过程中记录了这些层的原位光吸收光谱。通过吸收光谱、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）和能量色散X射线能谱（EDX）对混合层进行了表征。在混合层的吸收光谱中，出现了Ag-NPs特有的表面等离子体带。观察到由于Ag NPs的等离子体效应，光吸收有显著改善。通过SEM和XPS证明，在表面形成了平均直径为41-63nm的稳定Ag-NPs。Ag-NP的覆盖度和尺寸取决于混合层的制备条件和共聚物组成。XPS证明了Ag-NPs的金属特性。EDX分析进一步证实了其在表面层的位置。据我们所知，这是关于这种具有多种光子和电子应用潜力的混合层的首次报道。
