title: A biomimetic sensor for the detection of lead in water.
abstract: 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.
authors.affiliation: School of Life and Environmental Sciences, Deakin University, Vic. 3217, Australia.
authors.forename: Wendy
authors.initials: W
authors.lastname: Chu
authors.affiliation: School of Life and Environmental Sciences, Deakin University, Vic. 3217, Australia; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
authors.forename: Yuanchao
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Life and Environmental Sciences, Deakin University, Vic. 3217, Australia.
authors.forename: Da
authors.initials: D
authors.lastname: Li
authors.affiliation: School of Life and Environmental Sciences, Deakin University, Vic. 3217, Australia.
authors.forename: Colin J
authors.initials: CJ
authors.lastname: Barrow
authors.affiliation: School of Chemistry and Biotechnology, Yunnan Minzu University, Kunming 650031, China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Wang
authors.affiliation: School of Life and Environmental Sciences, Deakin University, Vic. 3217, Australia; School of Chemistry and Biotechnology, Yunnan Minzu University, Kunming 650031, China. Electronic address: wenrong.yang@deakin.edu.au.
authors.forename: Wenrong
authors.initials: W
authors.lastname: Yang
mesh_terms: D015374:Biosensing Techniques; D006046:Gold / Q000737:chemistry; D006801:Humans; D007477:Ions / Q000302:isolation & purification* / Q000633:toxicity; D007854:Lead / Q000302:isolation & purification* / Q000633:toxicity; D053768:Metal Nanoparticles / Q000737:chemistry; D020349:Surface Plasmon Resonance; D014867:Water / Q000737:chemistry; D014877:Water Pollution, Chemical
chemical_list: D007477:Ions; D014867:Water; D007854:Lead; D006046:Gold
keywords: Colorimetric; Core–satellite; Glutathione; Gold nanoparticle; Lead; Self-assembly