Silver nanoparticles in the presence of Ca2+ as a selective and sensitive probe for the colorimetric detection of cysteine

Date

2012-06-01

Author

Hajizadeh, Salahaddin
Farhadi, Khalil
Forough, Mehrdad
Molaei, Rahim

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

103
views

0
downloads

A sensitive and selective cysteine colorimeric sensor based on the interaction between cysteine, silver nanoparticles (AgNPs) and calcium ions has been developed. In the presence of Ca2+ and NaCl, cysteine could rapidly induce the aggregation of AgNPs, thereby resulting in a yellow-to-red color change. The presence of 10 mM NaCl in the samples decreases the electrostatic repulsion and accelerates the aggregation of AgNPs. Results demonstrated that other amino acids cannot change the color of AgNPs solution in the same conditions, probably due to the absence of the thiol groups, suggesting the selectivity of the proposed method toward cysteine. The color change was monitored by naked eye and UV-Vis spectrophotometry. The ratio of absorption at 524 to 396 nm (A(524)/A(396)) is linearly dependent on the cysteine concentration in the range of 0.25-10 mu M.

URI

https://hdl.handle.net/11511/90452

Journal

ANALYTICAL METHODS

DOI

https://doi.org/10.1039/c2ay05848k

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Silver nanoparticles as a cyanide colorimetric sensor in aqueous media Hajizadeh, Salahaddin; Farhadi, Khalil; Forough, Mehrdad; Sabzi, Reza Emamali (2011-11-01) The interaction between aqueous colloidal silver nanoparticles (AgNPs) and cyanide ions was studied using UV-Vis absorption and scanning electron microscopy (SEM) techniques. It was found that AgNPs were oxidized by dissolved oxygen in the presence of cyanide ions, resulting in a considerable decrease in the intensity of the surface plasmon resonance (SPR) absorption band of AgNPs. So, we propose a simple, cost effective, rapid, sensitive and selective colorimetric sensor for the detection of cyanide using ...
Silver nanoparticles as a new colorimetric probe for determination of oxalic acid in urine Basharzad, Parisa Fateh; Farhadi, Khalil; Forough, Mehrdad; Molaei, Rahim (2016-09-01) A new and high potential colorimetric sensor for the selective recognition and monitoring of oxalic acid (OA) in aqueous samples has been developed based on the interaction between OA and unmodified silver nanoparticles (AgNPs). The fresh synthesized silver nanoparticles are yellowishbrown in color due to the intense SPR absorption band. It was found that AgNPs were aggregated in the presence of oxalic acid, resulting in a considerable decrease in the intensity of the surface plasmon resonance (SPR) absorpt...
Silver-Sodium Ion Exchange Dynamics in LTA Zeolite Membranes Salmas, Ramin Ekhteiari; Demir, Baris; Yıldırım, Erol; Sirkecioğlu, Ahmet; Yurtsever, Mine; Ahunbay, Mehmet Göktuğ (2013-01-31) Because of their high ion exchange capacity, silver exchanged LTA (Ag-LTA) zeolites can be incorporated in polymeric materials as antibacterial agents for various purposes such as preventing biofouling in water treatment membranes due to the formation of microorganisms like bacteria, algae. Ag-LTA can be prepared by exchanging extra-framework Na+ ions in an aqueous solution containing Ag+ ions. Since the release amount and rate of Ag+ ions from the zeolite are crucial factors determining the antibacterial e...
Silver nanoparticles-tragacanth gel as a green membrane for effective extraction and determination of capecitabine Hajizadeh, Salahaddin; Farhadi, Khalil; Molaei, Rahim; Forough, Mehrdad (Wiley, 2020-07-01) A novel eco-friendly and effective electromembrane extraction method combining high-performance liquid chromatography with UV detection was developed for the enrichment and determination of capecitabine. Tragacanth-silver nanoparticles conjugated gel was prepared by dissolving the tragacanth powder in synthesized silver nanoparticles solution and was used as a green membrane in electromembrane extraction. The porosity and presence of silver nanoparticles in the gel were characterized by field emission scann...
Highly selective Hg2+ colorimetric sensor using green synthesized and unmodified silver nanoparticles Farhadi, Khalil; Forough, Mehrdad; Molaei, Rahim; Hajizadeh, Salahaddin; Rafipour, Aysan (2012-01-01) The reaction between biologically green synthesized silver nanoparticles (Ag NPs) and mercury (II) ions was introduced as a new and high potential calorimetric sensor for the selective recognition and monitoring of mercuric ions in aqueous samples. The green synthesized silver nanoparticles were characterized with surface plasmon resonance (SPR) ultraviolet spectroscopy (UV-vis), SEM and X-ray diffraction analysis (XRD) techniques. The fresh biologically synthesized silver nanoparticles are yellowish-brown ...

Citation Formats

S. Hajizadeh, K. Farhadi, M. Forough, and R. Molaei, “Silver nanoparticles in the presence of Ca2+ as a selective and sensitive probe for the colorimetric detection of cysteine,” ANALYTICAL METHODS, pp. 1747–1752, 2012, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/90452.