Kim Jae Young, Jang Hyo Jun, Bae Gyu Tae, Park Choon-Sang, Jung Eun Young, Tae Heung-Sik
School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea.
Department of Electrical and Computer Engineering, College of Engineering, Kansas State University, Manhattan, KS 66506, USA.
Nanomaterials (Basel). 2021 Dec 23;12(1):32. doi: 10.3390/nano12010032.
In atmospheric pressure (AP) plasma polymerization, increasing the effective volume of the plasma medium by expanding the plasma-generating region within the plasma reactor is considered a simple method to create regular and uniform polymer films. Here, we propose a newly designed AP plasma reactor with a cruciform wire electrode that can expand the discharge volume. Based on the plasma vessel configuration, which consists of a wide tube and a substrate stand, two tungsten wires crossed at 90 degrees are used as a common powered electrode in consideration of two-dimensional spatial expansion. In the wire electrode, which is partially covered by a glass capillary, discharge occurs at the boundary where the capillary terminates, so that the discharge region is divided into fourths along the cruciform electrode and the discharge volume can successfully expand. It is confirmed that although a discharge imbalance in the four regions of the AP plasma reactor can adversely affect the uniformity of the polymerized, nanostructured polymer film, rotating the substrate using a turntable can significantly improve the film uniformity. With this AP plasma reactor, nanostructured polythiophene (PTh) films are synthesized and the morphology and chemical properties of the PTh nanostructure, as well as the PTh-film uniformity and electrical properties, are investigated in detail.
在大气压（AP）等离子体聚合中，通过扩大等离子体反应器内的等离子体产生区域来增加等离子体介质的有效体积，被认为是制备规则且均匀聚合物薄膜的一种简单方法。在此，我们提出一种新设计的带有十字形线电极的AP等离子体反应器，该电极可扩大放电体积。基于由宽管和衬底支架组成的等离子体容器结构，考虑到二维空间扩展，两根成90度交叉的钨丝用作公共供电电极。在部分被玻璃毛细管覆盖的线电极中，放电发生在毛细管终止的边界处，这样放电区域就沿着十字形电极被分成四份，放电体积得以成功扩大。已证实，尽管AP等离子体反应器四个区域中的放电不平衡会对聚合的纳米结构聚合物薄膜的均匀性产生不利影响，但使用转盘旋转衬底可显著提高薄膜均匀性。利用这种AP等离子体反应器，合成了纳米结构的聚噻吩（PTh）薄膜，并详细研究了PTh纳米结构的形态和化学性质，以及PTh薄膜的均匀性和电学性质。
