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首页> 外文期刊>Nanotechnology >Nanobrick wall multilayer thin films grown faster and stronger using electrophoretic deposition
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Nanobrick wall multilayer thin films grown faster and stronger using electrophoretic deposition

机译：使用电泳沉积，纳米砖壁多层薄膜生长得更快，更强

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摘要

In an effort to speed up the layer-by-layer (LbL) deposition technique, electrophoretic deposition (EPD) is employed with weak polyelectrolytes and clay nanoplatelets. The introduction of an electric field results in nearly an order of magnitude increase in thickness relative to conventional LbL deposition for a given number of deposited layers. A higher clay concentration also results with the EPD-LbL process, which produces higher modulus and strength with fewer deposited layers. A 20 quadlayer (QL) assembly of linear polyethyleneimine (LPEI)/poly(acrylic acid)/LPEI/clay has an elastic modulus of 45 GPa, tensile strength of 70 MPa, and thickness of 4.4 mu m. Traditional LbL requires 40 QL to achieve the same thickness, with lower modulus and strength. This study reveals how these films grow and maintain a highly ordered nanobrick wall structure that is commonly associated with LbL deposition. Fewer layers required to achieve improved properties will open up many new opportunities for this multifunctional thin film deposition technique.
机译：为了加快逐层（LbL）沉积技术，电泳沉积（EPD）与弱聚电解质和粘土纳米片一起使用。对于给定数量的沉积层，电场的引入相对于传统的LbL沉积而言，导致厚度增加了近一个数量级。 EPD-LbL工艺还会产生更高的粘土浓度，该工艺可产生更高的模量和强度，且沉积层更少。线性聚乙烯亚胺（LPEI）/聚（丙烯酸）/ LPEI /粘土的20四层（QL）组件的弹性模量为45 GPa，拉伸强度为70 MPa，厚度为4.4μm。传统的LbL需要40 QL才能达到相同的厚度，同时具有较低的模量和强度。这项研究揭示了这些薄膜如何生长并保持通常与LbL沉积有关的高度有序的纳米砖壁结构。实现改进的性能所需的更少层将为这种多功能薄膜沉积技术开辟许多新机会。

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