Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session G70: Poster Session I (2:00pm-5:00pm)
2:00 PM,
Tuesday, March 5, 2019
BCEC
Room: Exhibit Hall
Abstract: G70.00063 : Optical Tweezer Measurements in Chlamydomonas*
Presenter:
Mauricio Gomez
(California State University, Fullerton)
Authors:
Mauricio Gomez
(California State University, Fullerton)
Corbyn Jones
(California State University, Fullerton)
Wylie Ahmed
(California State University, Fullerton)
to determine the physical properties of complex materials. We implement two calibration methods,
the photon-momentum method and the active-passive method, to measure displacements and forces
at the nanometer and piconewton scales. Here, we study the force uctuations of chlamydomonas
microswimmers by applying the photon-momentum method. We calculated the stochastic force
spectrum (Ptotal) by estimating the power spectral density of the uctuating force signal. We apply
a theoretical framework to extract the non-equilibrium microswimmer forces from the total force
spectrum. We then apply a spectrogram analysis to understand the frequency-time dynamics of the
chlamydomonas microswimmer. We hope to extract the force kinetics of the agella and molecular
motors.
*CSUF Dan Black Family Fellowship
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