Abstract

Optofluidic manipulation of droplets is critical in droplet-based microfluidic systems for chemistry, biology, and medicine. Here, we reported a thermocapillary microvortices-based manipulation platform for controlling oil-in-water droplets through integrating a photothermal waveguide into a microfluidic chip. The sizes and shapes of the droplets can be controlled by adjusting optical power or positions of the water–oil interface. Here, teardrop-shaped droplets, which can encapsulate and accumulate mesoscopic matters easily, were generated when the water–oil interface and the channel boundaries approached the photothermal waveguide center simultaneously. The results showed that the thermocapillary microvortices have good controllability of droplet positions, droplet volumes, and encapsulated-particle distribution and thus it will be a powerful droplet manipulation strategy for microreactors and microcapsules.

© 2020 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Controllable generation and manipulation of micro-bubbles in water with absorptive colloid particles by CW laser radiation

O. V. Angelsky, A. Ya. Bekshaev, P. P. Maksimyak, A. P. Maksimyak, S. G. Hanson, and S. M. Kontush
Opt. Express 25(5) 5232-5243 (2017)

Holographic interferometry of oil films and droplets in water with a single-beam mirror-type scheme

Nickolai Kukhtarev, Tatiana Kukhtareva, and Sonia C. Gallegos
Appl. Opt. 50(7) B53-B57 (2011)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Supplementary Material (3)

NameDescription
» Visualization 1       Droplet fusion at various optical powers.
» Visualization 2       Droplet generation at various boundary conditions.
» Visualization 3       Teardrop-shaped droplet generation and object encapsulation.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription