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首页> 外文期刊>ACS applied materials & interfaces >Regulation of the Deposition Morphology of Inkjet-Printed Crystalline Materials via Polydopamine Functional Coatings for Highly Uniform and Electrically Conductive Patterns
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Regulation of the Deposition Morphology of Inkjet-Printed Crystalline Materials via Polydopamine Functional Coatings for Highly Uniform and Electrically Conductive Patterns

机译：通过聚多巴胺功能性涂料对高度均匀和导电图案的喷墨印刷结晶材料的沉积形态进行调节

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摘要

We report a method to achieve highly uniform inkjet-printed silver nitrate (AgNO3) and a reactive silver precursor patterns on rigid and flexible substrates functionalized with polydopamine (PDA) coatings. The printed AgNO3 patterns on PDA-coated substrates (glass and polyethylene terephthalate (PET)) exhibit a narrow thickness distribution ranging between 0.9 and 1 mu m in the line transverse direction and uniform deposition profiles in the line axial direction. The deposited reactive silver precursor patterns on PDA-functionalized substrates also show "dome-shaped" morphology without "edge-thickened" structure due to "coffee-stain" effect. We posit that the highly uniform functional ink deposits formed on PDA-coated substrates are attributable to the strong binding interaction between the abundant catecholamine moieties at the PDA surface and the metallic silver cations (Ag+ or Ag(NH3)(2+)) in the solutal inks. During printing of the ink rivulet and solvent evaporation, the substrate-liquid ink-(S-L) interface is enriched with the silver-based cations and a solidification at the S/L interface is induced. The preferential solidification initiated at the S-L interface is further verified by the in situ visualization of the dynamic solidification process during solvent evaporation, and results suggest an enhanced crystal nucleation and growth localized at the S-L interface on PDA functionalized substrates. This interfacial interaction mediates solute transport in the liquid phase, resulting in the controlled enrichment of solute at the S-L interface and mitigated solute precipitation in both the contact line region and the liquid ink vapor (L-V) interface due to evaporation. This mediated transport contributes to the final uniform solid deposition for both types of ink systems. This technique provides a complementary strategy for achieving highly uniform inkjet-printed crystalline structures, and can serve as an innovative foundation for high-precision additive delivery of functional materials.
机译：我们报告了一种在具有聚多巴胺（PDA）涂层功能的刚性和柔性基材上实现高度均匀的喷墨印刷硝酸银（AgNO3）和反应性银前体图案的方法。在PDA涂覆的基板（玻璃和聚对苯二甲酸乙二酯（PET））上印刷的AgNO3图案在线横向方向上的厚度分布窄，介于0.9和1μm之间，在线轴向方向上的沉积轮廓均匀。由于“咖啡渍”效应，在PDA功能化的基底上沉积的反应性银前体图案还显示出“圆顶状”形态，而没有“边缘增厚”结构。我们认为，在PDA涂层基材上形成的高度均匀的功能性油墨沉积物可归因于PDA表面的丰富儿茶酚胺部分与金属离子中的金属银阳离子（Ag +或Ag（NH3）（2+））之间的强结合相互作用。溶解性油墨。在墨水小溪的打印和溶剂蒸发过程中，基材-液体墨水-（S-L）界面富含银基阳离子，并在S / L界面引起固化。通过溶剂蒸发过程中动态固化过程的原位可视化进一步验证了在S-L界面处引发的优先固化，结果表明，增强的晶体成核作用和生长在PDA功能化基板上的S-L界面处。这种界面相互作用介导了液相中的溶质传输，从而导致溶质在S-L界面处受控富集，并减少了由于蒸发而在接触线区域和液体墨水蒸气（L-V）界面中出现的溶质沉淀。对于两种类型的油墨系统，这种介导的传输有助于最终均匀的固体沉积。该技术为实现高度均匀的喷墨打印晶体结构提供了一种补充策略，并且可以作为功能性材料高精度添加剂输送的创新基础。

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