Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
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
154
views
0
downloads
Cite This
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
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
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.