Moving Droplets in 3D Using Light

被引：62

作者：

Xiao, Yang ^{[1
]}

Zarghami, Sara ^{[1
]}

Wagner, Klaudia ^{[1
]}

Wagner, Pawel ^{[1
]}

Gordon, Keith C. ^{[2
]}

Florea, Larisa ^{[3
]}

Diamond, Dermot ^{[3
]}

Officer, David L. ^{[1
]}

机构：

[1] Univ Wollongong, AIIM Fac, Polymer Res Inst, ARC Ctr Excellence Electromat Sci & Intelligent, Innovat Campus, North Wollongong, NSW 2522, Australia

[2] Univ Otago, Dept Chem, Dunedin 9054, New Zealand

[3] Dublin City Univ, Natl Ctr Sensor Res, Insight Ctr Data Analyt, Dublin 9, Ireland

来源：

ADVANCED MATERIALS | 2018年 / 30卷 / 35期

基金：

爱尔兰科学基金会; 澳大利亚研究理事会;

关键词：

chemical transport; interfacial tension; Marangoni effect; photoactive microdroplets; spiropyran; MICROFLUIDICS; DRIVEN;

D O I：

10.1002/adma.201801821

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The emulation of the complex cellular and bacterial vesicles used to transport materials through fluids has the potential to add revolutionary capabilities to fluidic platforms. Although a number of artificial motile vesicles or microdroplets have been demonstrated previously, control over their movement in liquid in 3D has not been achieved. Here it is shown that by adding a chemical "fuel," a photoactive material, to the droplet, it can be moved in any direction (3D) in water using simple light sources without the need for additives in the water. The droplets can be made up of a range of solvents and move with speeds as high as 10.4 mm s(-1) toward or away from the irradiation source as a result of a light-induced isothermal change in interfacial tension (Marangoni flow). It is further demonstrated that more complex functions can be accomplished by merging a photoactive droplet with a droplet carrying a "cargo" and moving the new larger droplet to a "reactor" droplet where the cargo undergoes a chemical reaction. The control and versatility of this light-activated, motile droplet system will open up new possibilities for fluidic chemical transport and applications.

引用

页数：8