System for characterization of colloids by dynamic light scattering within a size range of 0.8 nm to 10 µm. Suitable for material systems with concentrations from ppm up to 40% vol., depending on substance type. Minimum is 1 droplet.
Particle Size Distributions
The NANO-flex® 180° DLS System measures size distributions in the range of 0.8 nm to 10 µm.
The applied heterodyne 180° back scattering principle of the Nanotrac® is characterised by its high selectivity in the nano-range and is therefore also suitable for samples with broad size distribution. Furthermore, the resolution is impressing. Highly concentrated samples are measured without interfering multiple scattering.
The applied Nanotrac® back scattering in the NANO-flex® is designed as a flexible measuring probe with 8 mm ø. Thus, it can be used in many ways, even in-situ and in the measuring cylinder of the Stabino®!
The 180° DLS–Method
The laser is focused to the sample via an optical fiber and a sapphire window. The window reflects a part of the incoming laser light. Both, laser reflection and scattered light interfere at the detector diode. Due to the excellent signal/noise ratio, there is no need for an expensive detection system.
Benefits of 180° DLS:
- Shortest light path in the sample (<0.3 µm) implying
o no multiple light scattering
o samples from transparent to opaque
- up to 40% v/v from 0.8 (LOQ) to 10,000 nm
- size result does not change over decades of sample concentration
- high dynamic range and high resolution in ONE measurement