Calibration of trap stiffness and viscoelasticity in polymer solutions

• We present an experimental demonstration of a method using optical tweezers proposed by Fischer and Berg-Sorensen for measuring viscoelasticity using optical tweezers. It is based on a sinusoidal oscillation of the liquid in combination with force measurements using optical tweezers. We verify the method by applying it to measurements in water, glycerol and polyethylene oxide (PEO).

Subject headings

NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)

Keyword

Optical tweezers

Viscoelasticity

Viscosity

ABS resins

Elasticity

Force measurement

Glycerol

Micromanipulators

Optical instruments

Polyethylene glycols

Polyethylene oxides

Polymer solutions

Polymers

Sinusoidal oscillations

Trap stiffnesses

Publication and Content Type

ref (subject category)

kon (subject category)