A multi-axis confocal rheoscope for studying shear flow of structured fluids

Neil Y. C. Lin, Jonathan H. McCoy, Xiang Cheng, Brian Leahy, Jacob N. Israelachvili, Itai Cohen

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We present a new design for a confocal rheoscope that enables uniform uniaxial or biaxial shear. The design consists of two precisely positioned parallel plates with a gap that can be adjusted down to 2 ±0.1 μm, allowing for the exploration of confinement effects. By using our shear cell in conjunction with a biaxial force measurement device and a high-speed confocal microscope, we are able to measure the real-time biaxial stress while simultaneously imaging the material three-dimensional structure. We illustrate the importance of the instrument capabilities by discussing the applications of this instrument in current and future research topics in colloidal suspensions. © 2014 AIP Publishing LLC.
Original languageEnglish (US)
Pages (from-to)033905
JournalReview of Scientific Instruments
Volume85
Issue number3
DOIs
StatePublished - Mar 2014
Externally publishedYes

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