title: Measuring storage and loss moduli using optical tweezers: broadband microrheology.
abstract: We present an experimental procedure to perform broadband microrheological measurements with optical tweezers. A generalized Langevin equation is adopted to relate the time-dependent trajectory of a particle in an imposed flow to the frequency-dependent moduli of the complex fluid. This procedure allows us to measure the material linear viscoelastic properties across the widest frequency range achievable with optical tweezers.
authors.affiliation: Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow G12 8LT, UK. m.tassieri@elec.gla.ac.uk
authors.forename: Manlio
authors.initials: M
authors.lastname: Tassieri
authors.forename: Graham M
authors.initials: GM
authors.lastname: Gibson
authors.forename: R M L
authors.initials: RM
authors.lastname: Evans
authors.forename: Alison M
authors.initials: AM
authors.lastname: Yao
authors.forename: Rebecca
authors.initials: R
authors.lastname: Warren
authors.forename: Miles J
authors.initials: MJ
authors.lastname: Padgett
authors.forename: Jonathan M
authors.initials: JM
authors.lastname: Cooper