Photoluminescent Graphene Oxide Microarray for Multiplex Heavy Metal Ion Analysis

Since heavy metal ions included in water or food resources have a critical effect on human health, the highly sensitive, rapid, and selective analysis for heavy metal ion detection has been extensively explored by means of electrochemical, optical, and colorimetric methods. [ 1 ] For example, quantum dots (QDs), such as semiconductor QDs, have received enormous attention due to their extraordinary optical properties including high fl uorescence intensity and narrow emission peaks, and have been utilized for heavy metal ion detection. [ 2 ]