Rheology of fluids measured by correlation force spectroscopy

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dc.contributorVirginia Techen
dc.contributor.authorRadiom, Miladen
dc.contributor.authorRobbins, Brian A.en
dc.contributor.authorHonig, Christopher D. F.en
dc.contributor.authorWalz, John Y.en
dc.contributor.authorPaul, Mark R.en
dc.contributor.authorDucker, William A.en
dc.contributor.departmentMechanical Engineeringen
dc.contributor.departmentChemical Engineeringen
dc.date.accessed2014-01-25en
dc.date.accessioned2014-01-23T13:49:09Zen
dc.date.available2014-01-23T13:49:09Zen
dc.date.issued2012-04-01en
dc.description.abstractWe describe a method, correlation force spectrometry (CFS), which characterizes fluids through measurement of the correlations between the thermally stimulated vibrations of two closely spaced micrometer-scale cantilevers in fluid. We discuss a major application: measurement of the rheological properties of fluids at high frequency and high spatial resolution. Use of CFS as a rheometer is validated by comparison between experimental data and finite element modeling of the deterministic ring-down of cantilevers using the known viscosity of fluids. The data can also be accurately fitted using a harmonic oscillator model, which can be used for rapid rheometric measurements after calibration. The method is non-invasive, uses a very small amount of fluid, and has no actively moving parts. It can also be used to analyze the rheology of complex fluids. We use CFS to show that (non-Newtonian) aqueous polyethylene oxide solution can be modeled approximately by incorporating an elastic spring between the cantilevers. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4704085]en
dc.description.sponsorshipNational Science Foundation CBET-0959228en
dc.description.sponsorshipVirginia Techen
dc.identifier.citationRadiom, Milad; Robbins, Brian; Honig, Christopher D. F.; et al., " Rheology of fluids measured by correlation force spectroscopy," Rev. Sci. Instrum. 83, 043908 (2012); http://dx.doi.org/10.1063/1.4704085en
dc.identifier.doihttps://doi.org/10.1063/1.4704085en
dc.identifier.issn0034-6748en
dc.identifier.urihttp://hdl.handle.net/10919/25132en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/rsi/83/4/10.1063/1.4704085en
dc.language.isoen_USen
dc.publisherAIP Publishingen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectMicroscopic viscoelasticityen
dc.subject2-point microrheologyen
dc.subjectThermal fluctuationsen
dc.subjectStochastic dynamicsen
dc.subjectFrequency-responseen
dc.subjectMicelle solutionsen
dc.subjectMicrocantileversen
dc.subjectViscous fluidsen
dc.subjectComplex fluidsen
dc.subjectSoft materialsen
dc.titleRheology of fluids measured by correlation force spectroscopyen
dc.title.serialReview of Scientific Instrumentsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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