Agina Elena V, Sizov Alexey S, Yablokov Mikhail Yu, Borshchev Oleg V, Bessonov Alexander A, Kirikova Marina N, Bailey Marc J A, Ponomarenko Sergei A
†Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, Profsoyuznaya Ul. 70, 117393 Moscow, Russia.
‡Nokia Technologies, 21 JJ Thomson Avenue, Madingley Road, Cambridge CB3 0FA, United Kingdom.
ACS Appl Mater Interfaces. 2015 Jun 10;7(22):11755-64. doi: 10.1021/am508905t. Epub 2015 May 26.
An approach to polymer surface modification using self-assembled layers (SALs) of functional alkoxysilanes has been developed in order to improve the printability of silver nanoparticle inks and enhance adhesion between the metal conducting layer and the flexible polymer substrate. The SALs have been fully characterized by AFM, XPS, and WCA, and the resulting printability, adhesion, and electrical conductivity of the screen-printed metal contacts have been estimated by cross-cut tape test and 4-point probe measurements. It was shown that (3-mercaptopropyl)trimethoxysilane SALs enable significant adhesion improvements for both aqueous- and organic-based silver inks, approaching nearly 100% for PEN and PDMS substrates while exhibiting relatively low sheet resistance up to 0.1 Ω/sq. It was demonstrated that SALs containing functional -SH or -NH2 end groups offer the opportunity to increase the affinity of the polymer substrates to silver inks and thus to achieve efficient patterning of highly conductive structures on flexible and stretchable substrates.
为了提高银纳米颗粒墨水的可印刷性并增强金属导电层与柔性聚合物基板之间的附着力，已开发出一种使用功能性烷氧基硅烷自组装层（SALs）对聚合物表面进行改性的方法。通过原子力显微镜（AFM）、X射线光电子能谱（XPS）和接触角测量（WCA）对SALs进行了全面表征，并通过划格胶带试验和四点探针测量对丝网印刷金属触点的可印刷性、附着力和电导率进行了评估。结果表明，（3-巯基丙基）三甲氧基硅烷SALs能显著提高水性和有机基银墨水的附着力，对于聚萘二甲酸乙二醇酯（PEN）和聚二甲基硅氧烷（PDMS）基板，附着力接近100%，同时在高达0.1Ω/sq的情况下表现出相对较低的薄层电阻。结果表明，含有功能性-SH或-NH2端基的SALs为增加聚合物基板对银墨水的亲和力提供了机会，从而能够在柔性和可拉伸基板上实现高导电结构的有效图案化。
