Measurement of anisotropic nanoparticles length and width in a colloidal suspension

The latest nano-particle size analyzer from Cordouan Technologies represents a new step in the DLS technique for nano-particle size analysis. For the very first time, an instrument allows to measure easily length and width of anisotropic nanoparticles in a colloidal suspension.


PDF icon Thetis Cordouan Brochure763.61 KB
Key features & benefits
  • Three-in-one instrument
  • DLS, SLS and DDLS modes
  • Multi angle scattering detection system from 30 to 150 degrees
  • Detection according to 2 polarizations VV and VH
  • Size, aspect ratio, length and width measurements
  • Molecular weight measurement
  • Easy-to-use intuitive software Protheta
  • Software correlator – dynamic time slicing and data analysis feature
  • Small footprint
Software Proθ

A software fully-dedicated to nanoparticle size measurements offers :

  • User-friendly and intuitive user interface
  • User-defined Standard Operation Procedures (SOPs)
  • Software correlator
  • Dynamic time slicing option
  • Enhanced and oryginal data treatement algorithms: Multimodal Continuous Algorithm (MCA) and Multimodal Discrete Algorithm (MDA), together with a standard Cumulant method
  • Kinetic size distibution
  • Exhaustive solvent database
  • Reporting module
  • Simulation module

Technical Features


Particle size range

Particle size : 1 nm up to 1 μm

Sample concentration

0.0001% to 10% w/% (solvent dependent)

Temperature control range inside the cell

10°C to 70°C; +/-0,1°C (depending on cuvette cell material)

Sample cell

Cell : optical quality QS cylindrical ; 10 mm light path

Sample volume

>400 μL

Sample type

Aqueous & organic solvents; pH: 1-14 (depending on cuvette cell material)

Measurement Configuration Processing

Measurement technology

Static Light Scattering (SLS), Depolarized Dynamic Light Scattering (DDLS)

Laser source

Highly reliable 50 mW diode @635 nm coupled to automated optical attenuation system. Other wavelengths available upon request.


Avalanche Photodiode (APD)

Data processing algorithm

Real time and Time resolved autocorrelation (TR -DLS)

Measurement angles

All angles from 30° to 150°, step =


Power supply

100-115/220-240 VAC, 50/60 Hz, 100 W max

Computer interface

USB 2.0 / Windows 10 / 32 or 64-bit


33 cm x 33 cm x 38 cm (HWD)


17 kg

System compliance

CE certification

CE marked product – Class I laser product, EN 60825-1:2001, CDRH

Accessories and Services

2 years warranty

Protheta® software & Instruction manual

Calibration kit (option)