title: Photoluminescent graphene oxide microarray for multiplex heavy metal ion analysis.
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.
authors.affiliation: Department 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.
authors.forename: Fei
authors.initials: F
authors.lastname: Liu
authors.forename: Hyun Dong
authors.initials: HD
authors.lastname: Ha
authors.forename: Dong Ju
authors.initials: DJ
authors.lastname: Han
authors.forename: Tae Seok
authors.initials: TS
authors.lastname: Seo
keywords: electron transfer; graphene; heavy metal detection; microarrays; sensors