According to an embodiment, the inorganic metal oxide includes a crystalline core and a ligand positioned on a surface of the crystalline core, the crystalline core includes crystalline ZnO, and the ligand is a compound represented by Formula 1 below. In Chemical Formula 1, n may indicate 1 or 3, and X may indicate one selected from SH, an amine, methoxysilane, a carboxylic acid, and a carbonyl acid.