A biomimetic sensor for the detection of lead in water

作者：Chu Wendy; Zhang Yuanchao; Li Da; Barrow Colin J; Wang Hongbin; Yang Wenrong^*

来源：Biosensors and Bioelectronics, 2015, 67: 621-624.

DOI：10.1016/j.bios.2014.09.077

• Gold nanoparticle
• Core-satellite
• Self-assembly
• Lead
• Glutathion
• Calorimetric

The monitoring of lead (II) ions (Pb2+) in water is essential for both human health and the environment. Herein, a simple yet innovative biosensor for Pb2+ 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 Pb2+ 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.

• 出版日期2015-5-15
• 单位中国海洋大学