Spatial Ordering of Colloids in a Drying Aqueous Polymer Droplet

被引：27

作者：

Senses, Erkan ^{[1
]}

Black, Matthew ^{[2
]}

Cunningham, Thomas ^{[1
]}

Sukhishvili, Svetlana A. ^{[3
]}

Akcora, Pinar ^{[1
]}

机构：

[1] Stevens Inst Technol, Dept Chem Engn & Mat Sci, Hoboken, NJ 07030 USA

[2] Univ Maryland, Dept Bioengn, College Pk, MD 20742 USA

[3] Stevens Inst Technol, Dept Chem Chem Biol & Biomed Engn, Hoboken, NJ 07030 USA

来源：

LANGMUIR | 2013年 / 29卷 / 08期

关键词：

MIXTURES; EVAPORATION; SUPPRESSION;

D O I：

10.1021/la400032u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We explore the role of polymer chains on deposition of colloidal particles at solid surfaces from drying aqueous drops and show that the kinetics of phase separation of colloids and polymers can be explained by spinodal decomposition of binary systems. Concentrations of polymer solutions and polymer chain lengths were varied to understand the aggregation dynamics of colloidal particles via a polymer bridging mechanism. We show that when polymer concentration in the droplet is increased, particles spatially order upon drying due to a combination of the phase separation of highly bridged particles and the Marangoni flow effect. The demonstrated effect of particle-adsorbing, water-soluble polymers on the coffee-ring formation opens up new ways of creating highly ordered, long-range patterned surfaces using a facile, template-free approach.

引用

页码：2588 / 2594

页数：7

共 31 条

[1] Interfacial dynamics in demixing systems with ultralow interfacial tension [J].