The DWS RheoLab: From Microrheology to Macrorheology
The fast and easy-to-use Laser Light Rheometer based on Diffusing Wave Sepctroscopy
The need to understand the mechanical properties of natural or formulated substances containing small particles has become a main field of interest for many laboratories working on polymers, surfactants, micelles, thickeners, etc. With the DWS RheoLab such crucial information can be accessed conveniently and quickly using a novel principle for optical rheology: Diffusing Wave Spectroscopy (DWS) . The instrument monitors the thermal motion within the sample with nanometer resolution (microrheology) and automatically translates this information into rheological data (macrorheology).
"Optical microrheology has ermerged as one of the most important new techniques to study and characterize rheological properties of complex fluids!"
Dr. Frédéric Cardinaux, Food Colloids, 2007
- Fully automated DWS Microrheology
- Storage and loss modulus G'(ω) and G''(ω) obtained within minutes at frequencies up to 106 Hz
- Integrated temperature control (16°C – 70°C)
- Temperature stability < 0.02°C
- Compatible with low viscosity samples from 1 mPa
- No mechanical force applied to the sample
- Monitor time-dependent processes
- Measurement of non-linear effects possible
- Computes the mean square displacement (MSD) of particles
- Applicable to all homogeneous transparent or opaque samples
- Compact and robust design
- Several options available
Download detailed specification file:
Learn more about possible applications:
>> Application Notes DWS
Check the list of scientific publications which are based on results from a DWS tool by
LS Instruments.
Ask our DWS experts about special applications such as dispersion rheology or rheology under extreme conditions (e.g. high temperature or pressure) at info(a)lsinstruments.ch.