Nanoparticle Size Analyzer

The nanoparticle size analyzer is an instrument that characterizes particle size and distribution using dynamic light scattering technology. Our independently developed nanoparticle size analyzer is a nanoparticle sizing and characterization instrument based on the scattering principle.

Particles dispersed in a liquid undergo irregular Brownian motion due to collisions with thermally agitated liquid molecules. Under identical conditions, smaller particles exhibit more intense Brownian motion, resulting in more pronounced diffusion behavior. When a laser beam illuminates these particles, the intensity of the scattered light fluctuates randomly due to Brownian motion. The rate of these fluctuations correlates with the particle's Brownian motion speed. A specialized photon correlator directly measures the rate of scattered light intensity changes, thereby determining the particle's Brownian diffusion coefficient. Using the Stokes-Einstein equation, this coefficient enables calculation of the particle size and its size distribution.

Nanoparticle size analyzers are applied in abrasives, chemical mechanical polishing fluids, ceramics, clays, coatings, pollution monitoring, cosmetics, emulsions, food products, liquid working media/oils, inks, emulsions, pigmented paints, pharmaceutical powders, pigments, polymers, protein macromolecules, silica, and self-assembled TiO₂ nanotubes (TNAs).

• Employs high-precision photomultiplier tubes with photon-counting capability. Features low dark count, fiber-optic coupling, high speed, and exceptional stability.

• Incorporates an integrated photon correlator. The FPGA-based photon correlator integrates a dual-channel photon counter, ensuring zero photon loss; 1000 physical channels provide ample measurement data; sub-100ns sampling time enables measurement of particles as small as 1nm; on-chip module integration guarantees high-speed, stable data processing.

• Precise temperature control system. High-precision PWM-based temperature control achieves 0.5°C accuracy, ensuring measurement reliability.