Patent ID: 8067393

Claim:
A sugar-immobilized metal nanoparticle, which comprises: a ligand complex of a structure including a linker compound comprising thioctic acid and m-phenylenediamine at a molar ratio of 1:1, and a sugar having a reducing end, the linker compound including a hydrocarbon structure which includes: a hydrocarbon inducing chain with an aromatic amino group at an end and a carbon-nitrogen bond in a backbone; and a sulfur atom, the sugar being bound to the linker compound via the amino group; and gold bound to the ligand complex, wherein the sugar-immobilized metal nanoparticle is obtained by mixing the ligand complex with a solution of a gold nanoparticle prepared by mixing sodium tetrachloroaurate (III) with sodium borohydride, wherein the sugar-immobilized metal nanoparticle is stable, wherein a solution of the sugar-immobilized metal nanoparticle contains sodium tetrachloroaurate (III) at a concentration of 0.5 mM to 4 mM, sodium borohydride at a concentration that is 3 to 10 times a molar concentration of gold ion, and the ligand complex at a concentration of 10 μM to 1000 μM, and wherein the sugar-immobilized metal nanoparticle forms a sugar-protein interactant through interaction of a sugar and a protein, and wherein the sugar-immobilized metal nanoparticle forms a colloid solution when mixed with an aqueous solution.