Rapid and selective lead (II) colorimetric sensor based on azacrown ether-functionalized gold nanoparticles

Nanotechnology
A AlizadehM Sadeghi

Abstract

A gold nanoparticle (AuNPs)-based simple and fast colorimetric sensor for selective detecting of Pb(II) in aqueous solution has been developed. Monodisperse AuNPs (approx. 2.0 nm diameter) has been prepared facilely and further modified with an alkanethiol-bearing monoazacrown ether terminus. These AuNPs are shown to selectively sense Pb(2+) through color change, which is visually discernible by an appearance of the surface plasmon band (SPB) at 520 nm. The recognition mechanism is attributed to the unique structure of the monoazacrown ether attached to AuNPs and metal sandwich coordination between two azacrown ether moieties that are attached to separate nanoparticles. This inter-particle cross-linking results in an aggregation and apparent color change from brown to purple. Additionally, TEM experiments support the optical absorption data proving the aggregation between azacrown ether-capped gold nanoparticles. This AuNP-based colorimetric assay is a facile and robust method and allows fast detection of Pb(2+) at ambient temperatures. More importantly, the developed technique does not utilize enzymatic reactions, light-sensitive dye molecules, lengthy protocols or sophisticated instrumentation.

References

Jul 1, 1994·Environmental Research·J Schwartz
Mar 29, 2000·Accounts of Chemical Research·A C TempletonR W Murray
Jan 29, 2002·Analytical Chemistry·Sui-Yi LinChun-hsien Chen
May 13, 2004·Chemical Reviews·George W GokelMichelle E Weber
Dec 25, 2004·Journal of Fluorescence·Juewen Liu, Yi Lu
Apr 14, 2005·Chemical Reviews·Nathaniel L Rosi, Chad A Mirkin
Oct 7, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Arnold J KellMark S Workentin
Aug 12, 2006·The Journal of Organic Chemistry·Mona Hosseini-Sarvari, Hashem Sharghi
Oct 30, 2007·Nature Chemical Biology·Hee-Kyung KimYi Lu
Jan 31, 2008·Chemical Reviews·Matthew E StewartRalph G Nuzzo
Mar 26, 2008·Chemical Communications : Chem Comm·Juewen Liu, Yi Lu

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Citations

Jan 12, 2012·Physical Chemistry Chemical Physics : PCCP·Jacqueline FerreiraOsvaldo N Oliveira
Jun 28, 2011·ACS Applied Materials & Interfaces·Yen-Fei Lee, Chih-Ching Huang
Aug 1, 2014·Macromolecular Rapid Communications·Sukanta Kumar SahaZhi Yuan Wang
Dec 21, 2011·Chemical Society Reviews·Ha Na KimJuyoung Yoon

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