▎ 摘　　要

NOVELTY - Stabilizing double-strand DNA, comprises preserving the double-strand DNA in a system comprising graphene oxide and metal ion, where the metal ion is a monovalent metal ion and/or divalent metal ion. USE - The method is useful for stabilizing double-strand DNA. ADVANTAGE - The method ensures simple and economical stabilization of the double-strand DNA with better water solubility and dispersibility, effectively reduces or eliminates the enzyme digestion effect of multiple biological enzymes such as non-restriction endonuclease, exonuclease and restriction endonuclease enzyme on the double-strand DNA, and does not require the special modification such as silicon nanoparticles or silicon nanotubes. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a double-strand DNA stabilizer comprising the graphene oxide and metal ion.