Real-Time, Selective Detection of Pb2+ in Water Using a Reduced Graphene Oxide/Gold Nanoparticle Field-Effect Transistor Device

Real-Time, Selective Detection of Pb2+ in Water Using a Reduced Graphene Oxide/Gold Nanoparticle Field-Effect Transistor Device

A field-effect transistor (FET) device-based sensor is developed to specifically detect Pb2+ ions in an aqueous environment that is notably toxic. Reduced graphene oxide (rGO), as the semiconducting channel material, was utilized in the FET device through a self-assembly method. An l-glutathione red...

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Veröffentlicht in:ACS applied materials & interfaces 2014-11, Vol.6 (21), p.19235-19241
Hauptverfasser: Zhou, Guihua, Chang, Jingbo, Cui, Shumao, Pu, Haihui, Wen, Zhenhai, Chen, Junhong
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container_issue 21
container_start_page 19235
container_title ACS applied materials & interfaces
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creator Zhou, Guihua
Chang, Jingbo
Cui, Shumao
Pu, Haihui
Wen, Zhenhai
Chen, Junhong
description A field-effect transistor (FET) device-based sensor is developed to specifically detect Pb2+ ions in an aqueous environment that is notably toxic. Reduced graphene oxide (rGO), as the semiconducting channel material, was utilized in the FET device through a self-assembly method. An l-glutathione reduced was employed as the capture probe for the label-free detection. By monitoring the electrical characteristics of the FET device, the performance of the sensor was measured and investigated. Compared with conventional detection technologies, this sensor enabled real-time detection with a response time of 1–2 s. A lower detection limit for Pb2+ ions as low as 10 nM was achieved, which is much lower than the maximum contaminant level for Pb2+ ions in drinking water recommended by the World Health Organization. Furthermore, the rGO FET sensor was able to distinguish Pb2+ from other metal ions. Without any sample pretreatment, the platform is user-friendly.
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title Real-Time, Selective Detection of Pb2+ in Water Using a Reduced Graphene Oxide/Gold Nanoparticle Field-Effect Transistor Device
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