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A biomimetic sensor for the detection of lead in water.

journal contribution
posted on 2015-05-15, 00:00 authored by W Chu, Y Zhang, Da Li, Colin BarrowColin Barrow, H Wang, Wenrong YangWenrong Yang
The monitoring of lead (II) ions (Pb(2+)) in water is essential for both human health and the environment. Herein, a simple yet innovative biosensor for Pb(2+) detection is presented. The sensor is developed by the self-assembly of gold nanoparticles (GNPs) core-satellite structure using naturally occurring tripeptide glutathione (GSH) as linker. The addition of Pb(2+) caused a red-to-blue color change and the localized surface plasmon resonance (LSPR) band was shifted to ca. 650 nm. The limit of detection (LOD) is found to be 47.6 nM (9.9 ppb) by UV-vis spectroscopy with high selectivity against other heavy metals. This method offers a new strategy for heavy metal detection using functionalized GNPs.

History

Journal

Biosensors and Bioelectronics

Volume

67

Pagination

621 - 624

Publisher

Elsevier

Location

England

eISSN

1873-4235

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2015, Elsevier