One pot synthesis of monodispersed L-glutathione stabilized gold nanoparticles for the detection of Pb^2+ ions
Direct mixture of Au^3+ with glutathione (GSH), which act as both reduction agents and stabilizers, in aqueous solution gave rise to production of gold nanoparticles (Au NPs) with uniform sizes of around 21 nm. The GSH stabilizer Au NPs in solution show immediate aggregation after addition of 1 mol/...
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Published in | 中国计算机科学前沿:英文版 Vol. 5; no. 3; pp. 322 - 328 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
2011
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Subjects | |
Online Access | Get full text |
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Summary: | Direct mixture of Au^3+ with glutathione (GSH), which act as both reduction agents and stabilizers, in aqueous solution gave rise to production of gold nanoparticles (Au NPs) with uniform sizes of around 21 nm. The GSH stabilizer Au NPs in solution show immediate aggregation after addition of 1 mol/L NaCI aqueous solution containing Pb^2+ ions. The Pb^2+-induced aggregation in Au NP solution is monitored by both colorimetric response and UV-vis spectroscopy. A rather broad linear range (from 0.1 to 30 pmol/L) and low detection limit (0.1 pmol/L) are explored for Au NP sensors used for detection of Pb^2+ ions. Furthermore, the response of GSH-stabilized Au NPs toward Pb^2+ ions is specific compared with other possible interferants (Hg^2+, Mg^2+, Zn^2+, Ni^2+, Cu^2+, Co^2+, Ca^2+, Mn^2+, Cd^2+, and Ba^2+). |
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Bibliography: | lead(ll) ion, glutathione (GSH), gold nanoparticle (Au NP), detection, colorimetric response Direct mixture of Au^3+ with glutathione (GSH), which act as both reduction agents and stabilizers, in aqueous solution gave rise to production of gold nanoparticles (Au NPs) with uniform sizes of around 21 nm. The GSH stabilizer Au NPs in solution show immediate aggregation after addition of 1 mol/L NaCI aqueous solution containing Pb^2+ ions. The Pb^2+-induced aggregation in Au NP solution is monitored by both colorimetric response and UV-vis spectroscopy. A rather broad linear range (from 0.1 to 30 pmol/L) and low detection limit (0.1 pmol/L) are explored for Au NP sensors used for detection of Pb^2+ ions. Furthermore, the response of GSH-stabilized Au NPs toward Pb^2+ ions is specific compared with other possible interferants (Hg^2+, Mg^2+, Zn^2+, Ni^2+, Cu^2+, Co^2+, Ca^2+, Mn^2+, Cd^2+, and Ba^2+). 11-5731/TP |
ISSN: | 1673-7350 1673-7466 |