| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive composite of a nucleic acid and silver which has a particle size of nanometer size and a high content of silver, and a dispersion of silver fine particles with high dispersion stability.SOLUTION: A solution including 10-100 mM of a silver ion is mixed with a solution including DNA comprising 60-300 bases, and then reduced to prepare the dispersion of silver fine particles so that concentration of the silver fine particle is 0.1-5 mass%. Then the composite of the silver fine particle and the DNA is obtained, wherein the silver content is 70 mass% or more per dry weight, and the diameter is 0.5-50 nm. |
