Multipoint viscosity measurements in microfluidic channels using optical tweezers.
We demonstrate the technique of multipoint viscosity measurements incorporating the accurate calibration of micron sized particles. We describe the use of a high-speed camera to measure the residual motion of particles trapped in holographic optical tweezers, enabling us to calculate the fluid viscosity at multiple points across the field-of-view of the microscope within a microfluidic system.
Keen
Stephen
S
SUPA, Department of Physics and Astronomy, University of Glasgow, Glasgow, UK.
Yao
Alison
A
Leach
Jonathan
J
Di Leonardo
Roberto
R
Saunter
Chris
C
Love
Gordon
G
Cooper
Jonathan
J
Padgett
Miles
M
D002138:Calibration; D046210:Microfluidic Analytical Techniques; D008853:Microscopy; D008863:Microspheres; D009038:Motion; D052898:Optical Tweezers; D010781:Photography; D012822:Silicon Dioxide / Q000737:chemistry; D014783:Viscosity
D012822:Silicon Dioxide