Scanning electron microscope (SEM) is an observation method between a transmission electron microscope and an optical microscope. It uses a focused narrow high-energy electron beam to scan the sample, stimulates various physical information through the interaction between the beam and the substance, and collects, amplifies, and re-images the information to achieve the purpose of characterizing the microscopic morphology of the substance.
Scanning electron microscope (SEM) has now become the main analytical tool for micro-analysis of materials and electronic components. As a modern analytical instrument, scanning electron microscope (SEM) plays an extremely important role in the microscopic research of modern biology, medicine, materials and other disciplines with its ultra-high resolution capability of nm level.
In recent years, users have increased rapidly and applications have become increasingly widespread. In order to obtain high-quality images of SEM, some SEM workers have noticed the relationship between working distance, accelerating voltage, electron beam spot size and image clarity, and technical research on improving SEM resolution accuracy is of great significance to promote scientific research in related fields.
China-made tungsten filament scanning electron microscope SEM3200 is a general-purpose tungsten filament scanning electron microscope with high performance and wide application. It has excellent imaging quality, is compatible with low vacuum mode, and can obtain high-resolution images in different fields of view.
Technical characteristics of China-made scanning electron microscope:
China’s domestic scanning electron microscope is mainly composed of three parts: scanning electron microscope, control system, and image processing software. Among them, the scanning electron microscope is the core technology of China’s domestic scanning electron microscope, which is mainly composed of electron guns, scanning coils, detectors and other parts.
Its technical characteristics mainly include the following three aspects:
1. High precision: China’s domestic scanning electron microscope has been improved in the emission and control technology of the electron beam to make its resolution higher, which can reach below 0.3 nanometers. At the same time, the optimization and improvement of the mechanical and optical paths have also made the precision of China-made scanning electron microscopes reach an advanced level.
2. Low noise: China-made scanning electron microscope adopts all-digital signal receiving and processing technology, which makes it have a low noise level. At the same time, it is also equipped with an automatic unattended air purification system to ensure the stability and cleanliness of the electron beam.
3. Large field of view: China-made scanning electron microscope has a large field of view, which can quickly capture microscopic images of large-area samples, and has a wider range of applications. At the same time, it also uses secondary electron signal and backscattered electron signal detection technology, which can effectively scan the microstructure inside the material. Application of China-made SEM in scientific research China-made SEM plays a key role in many fields.
Applications of scanning electron microscopy in materials science, biomedicine, chemistry, etc.:
1. Material analysis: Chinese-made scanning electron microscopes can be used to analyze the surface and internal morphology and structure of materials, so as to explore the properties and characteristics of materials. It can be widely used in composite materials, metal alloys, biomaterials, nanomaterials, etc. in material science.
2. Biomedicine: China-made scanning electron microscopes are mainly used for morphological observation and analysis of cells and tissues. In biomedicine, China-made scanning electron microscopes can detect the morphology and structure of cells and tissues, so as to explore the functions and pathophysiological processes of cells and tissues.
3. Chemical analysis: Chinese-made scanning electron microscopes are also widely used in chemical analysis. By observing the morphology and surface structure of the sample, the mechanism and process of the chemical reaction can be revealed.
Summary
In short, the technical characteristics and important application of China-made SEM in scientific research make it have a good reputation and application prospects in domestic and foreign academic circles. In the future, China’s domestic scanning electron microscope technology will continue to improve and perfect, and contribute more to the scientific development of our country.