Viscosity Sensing With Lamb-Wave Microsensor: Dimethylsulfoxide Solution Viscosity as a Function of Temperature

[+] Author and Article Information
T. K. Eto, B. Rubinsky

Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720

B. J. Costello

University of California, San Francisco and Berkeley, Berkeley, CA 94720

S. W. Wenzel, R. M. White

Department of Electrical Engineering and Computer Sciences and Berkeley Sensor & Actuator Center, University of California at Berkeley, Berkeley, CA 94720

J Biomech Eng 115(3), 329-331 (Aug 01, 1993) (3 pages) doi:10.1115/1.2895494 History: Received August 12, 1992; Revised January 07, 1993; Online March 17, 2008


Recently, a new microsensor employing low-velocity ultrasonic Lamb waves was developed and demonstrated to be capable of measuring the viscosity of solutions in small volumes. The microsensor, when attached to a temperature-controlled stage, can measure viscosity as a function of temperature. In this investigation, the ultrasonic Lamb-wave oscillator is employed to experimentally measure the viscosity of dimethylsulfoxide (Me2 SO) solutions as a function of temperature. The microsensor and the experimental procedure are described and results for 1M, 3M, and 5M Me2 SO aqueous solutions are presented. Dimethylsulfoxide is a compound commonly employed as a cryoprotectant in cryopreservation, the low-temperature preservation of biological materials. The temperature dependence of viscosity obtained through this study can be used in determining the probability for ice nucleation in biological materials, a parameter of importance during cryopreservation.

Copyright © 1993 by The American Society of Mechanical Engineers
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