For example, nano-particle colloidal gold is used to immobilize dna particles on the surface of mica, interdigitated electrodes on the surface of silica are used to test the interaction of biomolecules, phospholipid and fatty acid bilayer planar biofilms, and the fine structure of dna. With nanotechnology, self-assembly methods can also be used to put parts or components into cells to form new materials. About half of the new drugs, even the fine powder of micron particles, are insoluble in water; however, if the particles are of nanometer size (ie ultrafine particles), they are soluble in water.
When nanobiology develops to a certain technology, nano-materials can be used to make nano-biological cells with recognition ability, and biomedicine that can absorb cancer cells, inject them into the human body, and can be used for targeted killing of cancer cells.