It is recognized by the scientific community that only materials with a particle size in the range of 1-100 nm are nanomaterials; electron microscopy can identify true and false "nano products" for us. It is true or false, and it can be seen at a glance. Tested by the electron microscope room of Tsinghua University, the anti-infective nano-silver powder was evenly distributed under the scanning tunneling electron microscope, and the particle size was about 25 nm.
It is only by scale that it is not possible to determine whether it is a nano-product. It must also be a product made with this, with unusual physical, chemical or biological properties, so that it can be called a true nano-product.
Technical problems necessary for the industrialization of nanotechnology:
1. How to make or produce nanoparticles having a sufficiently small particle size (between 1-100 nm) and uniform particle size distribution;
2. How to prevent the accumulation of highly active nanoparticles
3. How to maintain the activity of the nanoparticles under normal conditions;
4. How to fully reflect the specific energy of nanomaterials in product design.
Identify the true nano products:
1. Detect whether the particle size of the nanoparticles is in the range of 1-100 nm by an electron microscope, and the distribution is uniform.
2. Verify that the product has physical, chemical or biological properties different from the corresponding normal material product.
Using the specific physical, chemical, and biological properties of nanomaterials, you can create a wide range of products with specific functions.
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