29 August 2008 Calibration of trap stiffness and viscoelasticity in polymer solutions
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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).
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Susan H. Roelofs, Susan H. Roelofs, Martha B. Alvarez-Elizondo, Martha B. Alvarez-Elizondo, Timo A. Nieminen, Timo A. Nieminen, Martin Persson, Martin Persson, Norman Heckenberg, Norman Heckenberg, Halina Rubinsztein-Dunlop, Halina Rubinsztein-Dunlop, } "Calibration of trap stiffness and viscoelasticity in polymer solutions", Proc. SPIE 7038, Optical Trapping and Optical Micromanipulation V, 703823 (29 August 2008); doi: 10.1117/12.793577; https://doi.org/10.1117/12.793577

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