Highly sensitive and selective colorimetric probe for determination of L-cysteine in aqueous media based on Ag/Pd bimetallic nanoparticles

Date

2014-10-01

Author

Farhadi, Khalil
Forough, Mehrdad
Pourhossein, Atefeh
Molaei, Rahim

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The interaction between Ag/Pd bimetallic nanoparticles and cysteine was introduced as a new and high potential colorimetric probe for the selective, sensitive and low-cost recognition and monitoring of cysteine in aqueous samples. In the presence of NaCl, cysteine was able to induce the aggregation of Ag/Pd bimetallic nanoparticles thereby resulting in a change in yellowish-brown color of the Ag/Pd colloid to green. The presence of 6.6 mM NaCl in the samples decreases the electrostatic repulsion and accelerates the aggregation of Ag/Pd nanoparticles. The sensitivity and selectivity of the proposed sensor toward the other amino acids were studied too. This simple assay was rapid (5 min) and highly sensitive (limit of detection (LOD) = 3.3 nM)), selective and it can be used for rapid monitoring of cysteine in real pharmaceutical formulation. (C) 2014 Elsevier B.V. All rights reserved.

Subject Keywords

Colorimetric probe, Ag/Pd bimetallic nanoparticles, Cysteine, Determination, Aggregation

URI

https://hdl.handle.net/11511/90438

Journal

SENSORS AND ACTUATORS B-CHEMICAL

DOI

https://doi.org/10.1016/j.snb.2014.05.129

Collections

Department of Chemistry, Article

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Citation Formats

K. Farhadi, M. Forough, A. Pourhossein, and R. Molaei, “Highly sensitive and selective colorimetric probe for determination of L-cysteine in aqueous media based on Ag/Pd bimetallic nanoparticles,” SENSORS AND ACTUATORS B-CHEMICAL, pp. 993–1001, 2014, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/90438.