| abstract |
A metal ion nanocluster having a formula of X(OH)aYbZcMd(H20)e is provided in which X is a metal cation, Y is a water-soluble salt-forming anion, Z is a water-soluble ligand, M is a turbidity point modifier, a is 0.1 to 20, b is 0 to 9, c is 0.1 to 10, d is 0.1 to 9, and e is 0 to 25. The nanocluster has a particle size of 2 to 500 nm and a molecular weight of 3500 to 1000000 Dalton. Also disclosed are a composition containing the nanocluster and a method of preparing the nanocluster. The nanocluster is useful to treat a disorder such as a mineral deficiency disorder, a gastric reflux disorder, or a chronic renal failure, or to differentiate an abnormal tissue from a normal tissue. |