Nanomaterial and method of production of a nanomaterial for medical applications, such as mri or sers

A method for the synthesis of nanomaterial product which comprises at least one hybrid nanoparticle of gold-metal-biopolymer,

• the biopolymer comprising at least one biopolymer being chosen among:
• collagen, chitosan, polyethylene glycol diacid, alginate, or theirs derivatives,
• the metal being chosen among:
• Gd, Co, Eu, Tb, Ce, Mn, Fe, Zn, Cu,
• the method being realized in an aqueous solvent and presenting:
• Preparation steps (Ai-Aii, Bi-Bii) of mixing the gold ions, the metal ions and the biopolymer, for obtaining a resulting solution with gold-metal-biopolymer complex,
• One single step (Aiii, Biii) of synthesizing nanomaterial product which is the reduction of gold ions and metal ions in the presence of the biopolymer, by introducing a reducing agent in the resulting solution, the biopolymer being used as a stabilizer agent,
• the method being realized without chemical linker.