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dc.contributor.authorChowdhury, Ankan Duttaen_US
dc.contributor.authorDoong, Ruey-anen_US
dc.date.accessioned2017-04-21T06:55:36Z-
dc.date.available2017-04-21T06:55:36Z-
dc.date.issued2016-08-17en_US
dc.identifier.issn1944-8244en_US
dc.identifier.urihttp://dx.doi.org/10.1021/acsami.6b06266en_US
dc.identifier.urihttp://hdl.handle.net/11536/134087-
dc.description.abstractThe good stability, low cytotoxicity, and excellent photoluminescence property of graphene quantum dots (GQDs) make them an emerging class of promising materials in various application fields ranging from sensor to drug delivery. In the present work, the dopamine-functionalized GQDs (DA-GQDs) with stably bright blue fluorescence were successfully synthesized for low level Fe3+-ions detection. The as-synthesized GQDs are uniform in size with narrow-distributed particle size of 4.5 +/- 0.6 nm and high quantum yield of 10.2%. The amide linkage of GQDs with dopamine, confirmed by using XPS and FTIR spectra, results in the specific interaction between Fe3+ and catechol moiety of dopamine at the interfaces for highly sensitive and selective detection of Fe3+. A linear range of 20 nM to 2 mu M with a detection limit of 7.6 nM is obtained for Fe3+ detection by DA-GQDs. The selectivity of DA-GQDs sensing probe is significantly excellent in the presence of other interfering metal ions. In addition, the reaction mechanism for Fe3+ detection based on the complexation and oxidation of dopamine has been proposed and validated. Results obtained in this study clearly demonstrate the superiority of surface functionalized GQDs to Fe3+ detection, which can pave an avenue for the development of high performance and robust sensing probes for detection of metal ions and other organic metabolites in environmental and biomedical applications.en_US
dc.language.isoen_USen_US
dc.subjectferric ions detectionen_US
dc.subjectgraphene quantum dots (GQDs)en_US
dc.subjectdopamine-functionalized GQDsen_US
dc.subjectfluorescenceen_US
dc.subjectselectivityen_US
dc.titleHighly Sensitive and Selective Detection of Nanomolar Ferric Ions Using Dopamine Functionalized Graphene Quantum Dotsen_US
dc.identifier.doi10.1021/acsami.6b06266en_US
dc.identifier.journalACS APPLIED MATERIALS & INTERFACESen_US
dc.citation.volume8en_US
dc.citation.issue32en_US
dc.citation.spage21002en_US
dc.citation.epage21010en_US
dc.contributor.department環境工程研究所zh_TW
dc.contributor.departmentInstitute of Environmental Engineeringen_US
dc.identifier.wosnumberWOS:000381715900058en_US
Appears in Collections:Articles