打印纳米金属胶体可控组装高精度电路及应用研究

项目名称： 打印纳米金属胶体可控组装高精度电路及应用研究

项目编号： No.21203209

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理化学

项目作者： 张兴业

作者单位： 中国科学院化学研究所

项目金额： 26万元

中文摘要： 喷印电子电路是解决目前蚀刻电路环境污染、耗能问题的优选技术方案，也是面向快速大面积制备超轻、超薄及柔性电子电路等先进电子产品的技术解决方案，但是目前的喷印精度受制于喷头及液滴物理尺寸的限制，多年来，其精度一直停留在打印液滴直径20~50微米范围，甚至不及蚀刻电路的精度。本课题基于咖啡环效应胶体中的颗粒在挥发去浸润的过程中快速移向气-液-固三相接触线的原理， 通过协同调控纳米金属胶体性质和基底表面性能， 快速打印该纳米金属胶体形成的线路可以扩散分裂组装成两条平行的高精度电路，由于咖啡环效应形成的环截面宽度可以比液滴本身直径小1~2个数量级，因此，该方法可以用来制备微米（<10微米）及亚微米（100纳米~1微米）级高精度电路，此外，通过控制基底亲疏水图案化，该方法还可以用于各种微纳米颗粒胶体的高精度可控图案化组装。

中文关键词： 纳米银；打印；咖啡环；电路；

英文摘要： Inkjet-printed electronics is a promising method for large-scale and rapid fabrication of light, thin and flexible electronic products, and it's also a better alternative to conventional photolithography which generates large volumes of hazardous waste and damages the environment. However, little progress has been made during the last decade in inkjet resolution (equivalent to the size of droplet in the range of 20~50 micrometer) which mainly determined by the volume of the droplet. Coffee ring effect is a natural phenomenon, in which process the particles in the colloids are carried to the pinned contact line of the droplet with the surface tension induced capillary flow, and a thicker, narrow perimeter will be formed after the colloids has dried. In this study, coffee ring effect was positively used for inkjet printing high resolution electric circuits. Though coordinate adjustment of the metal nanoparticle colloids and modification of the substrate surface property, inkjet printed lines will be split into two narrow lines because of the coffee ring effect. It's known that the section width of the coffee ring is 1 ~2 order of magnitude lower than the diameter of the droplet, thus, micrometer(&lt;10 micrometer) and sub micrometer(100 nanometer ~ 1 micrometer) electric circuits could be fabricated by this approach.

英文关键词： nano silver；inkjet printing；coffee ring；conductive circuit；