An alginate monomer structure with metal crystallite embedded, comprising:
- a first alginate monomer composed of a first uronate molecule and a second uronate molecule linked linear to each other, wherein a first carbonyl group is formed on a second carbon atom (C2) of a main ring in the first uronate molecule;
- and a first intramonomer glycosidic linkage is presented between a first carbon atom (C1) in the first uronate molecule and a fourth carbon atom (C4) in the second uronate molecule;
- and
- at least a first metal crystallite associated between the first uronate molecule and the second uronate molecule.