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A biomimetic sensor for the detection of lead in water.
journal contributionposted 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.
JournalBiosensors and Bioelectronics
Pagination621 - 624
Publication classificationC Journal article; C1 Refereed article in a scholarly journal
Copyright notice2015, Elsevier
Read the peer-reviewed publication
ColorimetricCore–satelliteGlutathioneGold nanoparticleLeadSelf-assemblyScience & TechnologyLife Sciences & BiomedicinePhysical SciencesBiophysicsBiotechnology & Applied MicrobiologyChemistry, AnalyticalElectrochemistryNanoscience & NanotechnologyChemistryScience & Technology - Other TopicsCore-satelliteGlutathionCalorimetricCORE-SATELLITE NANOASSEMBLIESCOLORIMETRIC DETECTIONMETALS