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Updated: May 12, 2026
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Photoluminescent graphene oxide microarray for multiplex heavy metal ion analysis
Fei Liu1, Hyun Dong Ha, Dong Ju Han
1Department of Chemical and Biomolecular Engineering (BK21 program) and Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
Abstract:
An aptamer-linked graphene oxide (GO) microarray is synthesized for multiplex heavy metal ion detection. Fluorescent nanosized GO sheets are micropatterned, and specific aptamers targeting Ag(+) and Hg(2+) are immobilized on the GO array. Upon capture of the target heavy metal ions, electron transfer occurs between the GO (donors) and the heavy metal ions (acceptors), leading to fluorescence quenching of the GO.
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