Ultrasensitive voltammetric detection of trace heavy metal ions using carbon nanotube nanoelectrode array

文献情報

出版日 2005-05-18

DOI 10.1039/B419447K

インパクトファクター 4.616

著者

Guodong Liu, Yuehe Lin, Yi Tu, Zhifeng Ren

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要旨

We describe an ultrasensitive voltammetric detection of trace heavy metal ions using nanoelectrode arrays (NEAs) that are based on low-site density carbon nanotubes (CNTs). The NEAs were prepared by sealing the side-walls of CNTs with an epoxy passive layer that reduces the current leakage and eliminates the electrode capacitance, leading to a low background current. This provides a high signal-to-noise ratio. The CNTs-NEAs coated with a bismuth film were used successfully for voltammetric detection of trace cadmium(II) and lead(II) at the sub-ppb level. The detection limit of 0.04 μg L−1 was obtained under optimum experimental conditions. The attractive behavior of the new carbon NEA sensing platform holds great promise for onsite environmental monitoring and biomonitoring of toxic metals.

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CiteScore: 7.8

自己引用率: 5.6%

年間論文数: 653

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Ultrasensitive voltammetric detection of trace heavy metal ions using carbon nanotube nanoelectrode array

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