聚合物凝胶衍生的 PbS/C 复合纳米片及其近红外光电子响应特性研究

IF 2.9 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS
Coatings Pub Date : 2024-08-03 DOI:10.3390/coatings14080981
Xingfa Ma, Xintao Zhang, Mingjun Gao, You Wang, Guang Li
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引用次数: 0

摘要

非共轭聚合物衍生功能纳米复合材料是开发多功能混合材料的重要途径之一。通过提高交联度,可以改善其光物理性质。PbS 是一类窄带隙红外活性材料。为了避免 PbS 纳米材料表面缺陷的聚集和钝化,通常会使用大量的有机和无机配体。本研究通过一锅碳化法,用 Pb2+ 离子交联的海藻酸钠凝胶合成了 PbS/C 复合纳米片。将得到的纳米片涂布在未经处理的 A4 打印纸上,电极为 5B 铅笔绘制的石墨电极。使用典型的 650、808、980 和 1064 纳米光源测量了产品的光电流信号。结果表明,光电流开关信号在可见光和近红外区域被有效地提取出来,这归功于在原位制备 PbS 和碳纳米材料的过程中缺陷的相互钝化。同时,所制备的纳米复合材料在一定程度上表现出了对外加应变的电开关响应。根据碳杂化物的聚集状态和界面电子相互作用,讨论了光物理和缺陷钝化机制。这种材料有望应用于宽带柔性光电探测器、触角传感器或光收集等交叉学科领域。这项研究为制备具有外部刺激响应和多功能性的低成本混合材料提供了一种简便的方法。这些结果表明,界面电荷转移是界面相互作用的直接实验证据,而界面相互作用的调控可以改善纳米复合材料的物理和化学性质,从而满足跨学科应用的需要。更多的非共轭聚合物体系在一些前沿领域的学科交叉和应用将得到拓展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Polymer-Gel-Derived PbS/C Composite Nanosheets and Their Photoelectronic Response Properties Studies in the NIR
Non-conjugated polymer-derived functional nanocomposites are one of the important ways to develop multifunctional hybrids. By increasing the degree of crosslinking, their photophysical properties can be improved. PbS is a class of narrow bandgap infrared active materials. To avoid aggregation and passivation of the surface defects of PbS nanomaterials, a large number of organic and inorganic ligands are usually used. In this study, PbS/C composite nanosheets were synthesized with Pb2+ ion-crosslinked sodium alginate gel by one-pot carbonization. The resulting nanosheets were coated on untreated A4 printing paper, and the electrodes were the graphite electrodes with 5B pencil drawings. The photocurrent signals of the products were measured using typical 650, 808, 980, and 1064 nm light sources. The results showed that the photocurrent switching signals were effectively extracted in the visible and near-infrared regions, which was attributed to the mutual passivation of defects during the in situ preparation of PbS and carbon nanomaterials. At the same time, the resulting nanocomposite exhibited electrical switching responses to the applied strain to a certain extent. The photophysical and defect passivation mechanisms were discussed based on the aggregation state of the carbon hybrid and the interfacial electron interaction. This material would have potential applications in broadband flexible photodetectors, tentacle sensors, or light harvesting interdisciplinary areas. This study provided a facile approach to prepare a low-cost hybrid with external stimulus response and multifunctionality. These results show that the interfacial charge transfer is the direct experimental evidence of interfacial interaction, and the regulation of interfacial interaction can improve the physical and chemical properties of nanocomposites, which can meet the interdisciplinary application. The interdisciplinary and application of more non-conjugated polymer systems in some frontier areas will be expanded upon.
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来源期刊
Coatings
Coatings Materials Science-Surfaces, Coatings and Films
CiteScore
5.00
自引率
11.80%
发文量
1657
审稿时长
1.4 months
期刊介绍: Coatings is an international, peer-reviewed open access journal of coatings and surface engineering. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided. There are, in addition, unique features of this journal: * manuscripts regarding research proposals and research ideas will be particularly welcomed * electronic files or software regarding the full details of the calculation and experimental procedure - if unable to be published in a normal way - can be deposited as supplementary material
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