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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 YangThe 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 BioelectronicsVolume
67Pagination
621 - 624Publisher
ElsevierLocation
EnglandPublisher DOI
eISSN
1873-4235Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2015, ElsevierUsage metrics
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No categories selectedKeywords
ColorimetricCore–satelliteGlutathioneGold nanoparticleLeadSelf-assemblyScience & TechnologyLife Sciences & BiomedicinePhysical SciencesBiophysicsBiotechnology & Applied MicrobiologyChemistry, AnalyticalElectrochemistryNanoscience & NanotechnologyChemistryScience & Technology - Other TopicsCore-satelliteGlutathionCalorimetricCORE-SATELLITE NANOASSEMBLIESCOLORIMETRIC DETECTIONMETALS
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