期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 5, 页码 2775-2780出版社
AMER CHEMICAL SOC
DOI: 10.1021/am300423p
关键词
coffee ring; hydrosoluble polymer additives; dewetting droplet deposition; the motion of contact line
资金
- National Nature Science Foundation [91123031, 20921003]
- National Basic Research Program of China [2012CB933802]
A simple and novel method has been demonstrated for avoiding coffee ring structure based on hydrosoluble polymer additives during droplet evaporation. The polymer additives lead to the motion of the contact line (CL) resulted from the viscosity and Marangoni effect. The viscosity provides a large resistance to the radially outward flow. It results in a small amount of spheres deposited at droplet edge, which do not facilitate the pinning of the CL. The Marangoni effect resulted from the variation of polymer concentration at droplet edge during droplet evaporation contributes to the motion of the CL. Thus, uniform and ordered macroscale SiO2 microspheres deposition is achieved. What's more, the coffee ring effect can be,eliminated by different hydrosoluble polymer. This method will be applicable to a wide of aqueous system and will be of great significance for extensive applications of droplet deposition in biochemical assays and material deposition.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据