Microrheology using dual-beam optical tweezers and ultrasensitive force measurements

Gregor G. Knoener; Simon John Wyatt Parkin; Norman R. Heckenberg; Halina Rubinsztein-Dunlop

doi:10.1117/12.591183

14 March 2005 Microrheology using dual-beam optical tweezers and ultrasensitive force measurements

Gregor G. Knoener, Simon John Wyatt Parkin, Norman R. Heckenberg, Halina Rubinsztein-Dunlop

Proceedings Volume 5736, Nanomanipulation with Light; (2005) https://doi.org/10.1117/12.591183
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

We investigate the dynamics of microscopic flow vortices. We create flow vortices by rotation of birefringent particles in optical tweezers. We then use either highly sensitive drag force measurements or video tracking to map the fluid velocity around that particle. The results obtained from these different methods are compared. Velocity profiles obtained for water agree very well with theoretical predictions. In contrast, we find a strong deviation of velocity profiles in a complex fluid from those predicted by simple theory.

Citation Download Citation

Gregor G. Knoener, Simon John Wyatt Parkin, Norman R. Heckenberg, and Halina Rubinsztein-Dunlop "Microrheology using dual-beam optical tweezers and ultrasensitive force measurements", Proc. SPIE 5736, Nanomanipulation with Light, (14 March 2005); https://doi.org/10.1117/12.591183

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available