What are the present situation, application, development trend and existing problems of nano-materials and nano-technology?

At present, the basic feature of nano-materials research is to take practical application as the guidance, and to solve the key technical problems of nano-materials application by means of cross-integration of nano-materials and related sciences. Nano-materials belong to upstream products, on the one hand, they are used to upgrade traditional products, on the other hand, they are used to develop new nanotechnology products. In order to reflect the superior performance of nano-materials in downstream products, nano-manufacturing technology must be supported.