The IG-1000 Single Nano Particle Size Analyzer: An Instrument That Goes Beyond the Single Nano Region and Enters the Sub Nano Region.
This instrument uses the induced grating (IG) method, which is based on a new principle for measuring the size of nanoparticles using the phenomenon of dielectrophoresis and diffracted light.
With dynamic light scattering, the conventional method, the light scattered by particles decreases sharply for particle sizes of less than 100 nm. Furthermore, in the single nano region (i.e., particle sizes of less than 10 nm), there are physical restrictions that make it difficult to detect scattered light, and the measurement of particle sizes also becomes difficult. The IG method uses diffracted instead of scattered light and so it is free from these physical restrictions, and does not require the input of the refractive index as a measurement condition.
Specifications:
- simple workflow allows smooth measurements
- refractive index is not needed
- particularly effective in the analysis of single nanoparticles (< 10 nm)
- resistant to contamination
- high sensitivity and reproducibility
- measurements results can be validated using the change in the intensity of diffracted light (raw data)
What Is the "Induced Grating Method"?
The samples cell is equipped with cyclically arranged electrodes. An alternating voltage is applied to these electrodes, and a cyclic concentration distribution of microscopic particles is formed in the liquid by dielectrophoresis. This cyclic concentration distribution of microscopic particles acts as a diffraction grating. If the external force is removed, the diffraction grating disappears. With the IG method, the decay process of this particle density diffraction grating is measured via the change in intensity of the diffracted light, and a diffusion coefficient is obtained.
