Opto-mechano-fluidic viscometer

Journal Article · Mon Jul 07 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4887369· OSTI ID:22303973

Han, Kewen; Zhu, Kaiyuan; Bahl, Gaurav ^[1]

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1. Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 W. Green St., Urbana, Illinois 61801 (United States)

The recent development of opto-mechano-fluidic resonators has provided—by harnessing photon radiation pressure—a microfluidics platform for the optical sensing of fluid density and bulk modulus. Here, we show that fluid viscosity can also be determined through optomechanical measurement of the vibrational noise spectrum of the resonator mechanical modes. A linear relationship between the spectral linewidth and root-viscosity is predicted and experimentally verified in the low viscosity regime. Our result is a step towards multi-frequency measurement of viscoelasticity of arbitrary fluids, without sample contamination, using highly sensitive optomechanics techniques.

• OSTI ID: 22303973
• Journal Information: Applied Physics Letters, Vol. 105, Issue 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DENSITY
FLUIDS
FREQUENCY MEASUREMENT
MECHANICAL PROPERTIES
NOISE
OPTICAL PROPERTIES
PHOTONS
RADIATION PRESSURE
RESONATORS
SPECTRA
VISCOSITY