Work

Measurement of the microscopic viscosities of microfluids with a dynamic optical tweezers system

Year: 2014

Type: article

Abstract: Viscosity coefficients of microfluids-Newtonian and non-Newtonian-were explored through the rotational motion of a particle trapped by optical tweezers in a microflute. Unlike conventional methods based on viscometers, our microfluidic system employs samples of less than 30 µl to complete a measurement. Viscosity coefficients of ethanol and fetal bovine serum, as typical examples of Newtonian and non-Newtonian fluids, were obtained experimentally, and found to be in excellent agreement with theoretical predictions. Additionally, a practical application to a DNA solution with incremental ethidium bromide content was employed and the results are consistent with clinical data, indicating that our system provides a potentially important complementary tool for use in such biological and medical applications.

Source: Laser Physics

DOI: 10.1088/1054-660x/24/6/065601

Authors: Yuquan Zhang, Xiaojing Wu, Yijia Wang, Siwei Zhu, Bruce Z Gao, X-C Yuan

Institutions: Nankai University, Clemson University, Shenzhen University

Language: English

Topic: Orbital Angular Momentum in Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, National Heart, Lung, and Blood Institute, National Center for Research Resources

Awards: Center of Biomaterials for Tissue Regeneration (CBTR), Microfabricated coculture model: Myocyte rescue by TNT-transferred mitochondria