Ion Selective Electrode Mediated by Transfer Layer of Graphene Oxide for Detection of Ca2+ with Highly Sensitivity and Selectivity
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Abstract A Ca2+ selective microelectrode was proposed through electrodepositing graphene oxide (GO) on carbon fiber as an efficient ion-electron transfer layer. The gold leaves were further synthesized at GO surface to increase the specific surface area and provide a substrate for assembly of the specific ligands for Ca2+. GO with negative charges greatly facilitated the electron transfer process from the recognition center to electrode surface, resulting in the apparently enhanced sensitivity towards Ca2+. Moreover, the developed ion-selective microelectrode exhibited good selectivity to Ca2+, and a good linear range from 10 μM to 10 mM with a detection limit of 5.91±0.46 μM.
2017 ◽
Vol 19
(22)
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pp. 14412-14423
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1978 ◽
Vol 19
(8)
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pp. 763-764
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1989 ◽
Vol 264
(14)
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pp. 7976-7980
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1996 ◽
Vol 62
(11)
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pp. 1877-1885
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