title: Multipoint viscosity measurements in microfluidic channels using optical tweezers.
abstract: 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.
authors: SUPA, Department of Physics and Astronomy, University of Glasgow, Glasgow, UK.
authors: Stephen
authors: S
authors: Keen
authors: Alison
authors: A
authors: Yao
authors: Jonathan
authors: J
authors: Leach
authors: Roberto
authors: R
authors: Di Leonardo
authors: Chris
authors: C
authors: Saunter
authors: Gordon
authors: G
authors: Love
authors: Jonathan
authors: J
authors: Cooper
authors: Miles
authors: M
authors: Padgett
mesh_terms: D002138:Calibration; D046210:Microfluidic Analytical Techniques; D008853:Microscopy; D008863:Microspheres; D009038:Motion; D052898:Optical Tweezers; D010781:Photography; D012822:Silicon Dioxide / Q000737:chemistry; D014783:Viscosity
chemical_list: D012822:Silicon Dioxide