Abstract

Optical methods for microfluidic flow manipulation offer a flexible, noncontact technique for both fluid actuation and valving. At present, however, such techniques are limited by their high laser power requirements, low achieved flow rates, or poor valve switching times. Here we demonstrate a microfluidic valving technique based on optothermorheological manipulation using a low-power 40mW laser with switching times on the order of 1 s at high flow rates of 1mms. In our approach a laser beam incident on an absorbing substrate is used to locally heat a thermorheological fluid flowing in a microfluidic channel. The resulting gelation in the heated region creates a reversible fluid valve.

© 2009 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Shockwave based nonlinear optical manipulation in densely scattering opaque suspensions

Elad Greenfield, Jonathan Nemirovsky, Ramy El-Ganainy, Demetri N. Christodoulides, and Mordechai Segev
Opt. Express 21(20) 23785-23802 (2013)

Flow effects in the laser-induced thermal loading of optical traps and optofluidic devices

B. del Rosal, C. Sun, Y. Yan, M.D. Mackenzie, C. Lu, A. A. Bettiol, A.K. Kar, and D. Jaque
Opt. Express 22(20) 23938-23954 (2014)

Design and numerical simulation of an optofluidic pressure sensor

Majid Ebnali-Heidari, Morteza Mansouri, Saeed Mokhtarian, and Mohammed Kazem Moravvej-Farshi
Appl. Opt. 51(16) 3387-3396 (2012)

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 (1)

» Media 1: MOV (3598 KB)     

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 (4)

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

Metrics

You do not have subscription access to this journal. Article level metrics 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