Hydrodynamics of micro-objects near curved surfaces

Zhang, Shu, Carberry, David, Nieminen, Timo A. and Rubinsztein-Dunlop, Halina (2015). Hydrodynamics of micro-objects near curved surfaces. In: Kishan Dholakia and Gabriel C. Spalding, Optical Trapping and Optical Micromanipulation XII. Conference on Optical Trapping and Optical Micromanipulation XII, San Diego, CA United States, (). 09-12 August 2015. doi:10.1117/12.2190312


Author Zhang, Shu
Carberry, David
Nieminen, Timo A.
Rubinsztein-Dunlop, Halina
Title of paper Hydrodynamics of micro-objects near curved surfaces
Conference name Conference on Optical Trapping and Optical Micromanipulation XII
Conference location San Diego, CA United States
Conference dates 09-12 August 2015
Proceedings title Optical Trapping and Optical Micromanipulation XII   Check publisher's open access policy
Journal name Optical Trapping and Optical Micromanipulation XII   Check publisher's open access policy
Place of Publication Bellingham, WA United States
Publisher SPIE
Publication Year 2015
Sub-type Fully published paper
DOI 10.1117/12.2190312
Open Access Status Not Open Access
ISBN 9781628417142
ISSN 0277-786X
1996-756X
Editor Kishan Dholakia
Gabriel C. Spalding
Volume 9548
Total pages 1
Collection year 2016
Language eng
Abstract/Summary Boundary walls have a strong influence on the drag force on optically trapped object near surface. Faxen’s correction has shown how a flat surface modifies the hydrodynamic drag. However, to date, the effect of curved walls at microscopic scale on both translational and rotational movement of micro-objects has not been studied. Here we describe our experiments which aim to study the drag force on optically trapped particles moving near walls with different curvatures. The curved walls were made using 3D laser nano-printing (Nanoscribe), and optical tweezers were used to trap micro-objects near the walls. The translational and rotational motion of the optically trapped particle is related to the drag coefficients. By monitoring the change in the motion of particle, we determined the increase in drag force for particles translating or rotating at different distances from surfaces with different curvatures. These results are essential for calibrating the drag force on particles, and thus enable accurate rheology at the micron-scale. This opens the potential for microrheology under different conditions, such as within microdevices, biological cells and studies of biological processes.
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: School of Mathematics and Physics
 
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