With the rapid development of nanotechnology, the testing and analysis of nanoscale particles have become particularly important in fields such as materials science, biomedicine, and environmental protection. The particle size analyzer, as a precision testing instrument, has demonstrated significant advantages in nanoscale particle testing. This article will explore in detail several advantages of particle size and shape analyzers in nanoscale particle testing.
1、 Advanced testing principles
Particle size and shape analyzers typically use the principle of dynamic light scattering for testing. This principle is based on the Brownian motion of particles in liquids, and derives the particle size and distribution by measuring the changes in scattered light. This method has the characteristics of not damaging or interfering with the original state of the nanoparticle system, thus ensuring the authenticity and effectiveness of the test results. Compared to other testing methods such as electron microscopy, dynamic light scattering does not require sample pretreatment, avoiding potential errors that may be introduced.
2、 High sensitivity and signal-to-noise ratio
The particle size analyzer uses high-performance photomultiplier tubes (PMT) as detectors, which have the characteristics of high sensitivity and high signal-to-noise ratio. This means that the instrument can capture weaker scattered light signals, thereby improving the accuracy of the test. For nanoscale particles, a highly sensitive detector is one of the key factors ensuring testing accuracy due to its weak scattered light intensity.
3、 Ultra high speed data acquisition and processing
The particle size analyzer is equipped with an advanced data acquisition and processing system, which can complete real-time acquisition of dynamic scattered light intensity and autocorrelation function calculation. This effectively reflects the dynamic light scattering information of particles of different sizes, laying the foundation for the accuracy of test results. The ultra high speed data acquisition and processing capability enables the instrument to analyze a large amount of data in a short period of time, improving testing efficiency.
4、 Stable optical path system
The particle size analyzer is an optical path system built using fiber optic technology, which has the characteristics of small size and strong anti-interference ability. This ensures the stability of the testing process and avoids the influence of external factors on the test results. A stable optical path system is particularly important for testing nanoscale particles, as even small external disturbances can have a significant impact on the test results.
5、 High precision constant temperature control system
To ensure the accuracy of the test, the particle size analyzer is also equipped with a high-precision constant temperature control system. The system adopts semiconductor temperature control technology, with a temperature control accuracy of up to ± 0.2 ℃. This keeps the sample at a constant temperature throughout the entire testing process, avoiding the influence of temperature changes on liquid viscosity and Brownian motion speed, thereby ensuring the stability and accuracy of the test results.
In summary, the particle size analyzer has demonstrated many advantages in testing nanoscale particles. Its advanced testing principles, high sensitivity and signal-to-noise ratio, ultra high speed data acquisition and processing, stable optical path system, and high-precision constant temperature control system make the instrument have broad application prospects in the field of nanotechnology. In the future, with the continuous advancement and innovation of technology, the performance of particle size and shape analyzers will be further improved, providing more accurate and efficient methods for testing and analyzing nanoscale particles.