Synthesis of gold nanoparticles stabilized by a pyrazinium thioacetate ligand: A new colorimetric nanosensor for detection of heavy metal Pd(II)

Anwar, Ayaz and Minhaz, Aaliya and Khan, Naveed Ahmed and Kalantari, Katayoon and Afifi, Amalina Muhammad and Shah, Muhammad Raza (2018) Synthesis of gold nanoparticles stabilized by a pyrazinium thioacetate ligand: A new colorimetric nanosensor for detection of heavy metal Pd(II). Sensors and Actuators B: Chemical, 257. pp. 875-881. ISSN 0925-4005

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Official URL: https://doi.org/10.1016/j.snb.2017.11.040

Abstract

We developed a facile method for the synthesis of Gold nanoparticles (AuNPs) stabilized by cationic 1-(3-(acetylthio)propyl)pyrazin-1-ium ligand denoted as APP. Gold nanoparticles stabilized by APP (APP-AuNPs) are found to be polydispersed in size and lie in the range of 5–10 nm. We report a robust and sensitive protocol for the detection of heavy toxic metal ion Pd(II) in water using APP-AuNPs. From the fifteen salts tested, APP-AuNPs demonstrated a sensitive and selective spectrophotometric signal, as well as naked eye indication for recognition of Pd(II) ions. Pd(II) ions caused a colorimetric, distinguished response to APP-AuNPs based on the aggregation induced decrease of surface plasmon resonance (SPR) band. The nanosensor probe displayed a sensitive response to the Pd(II) ions in a wide range of concentration and pH, with detection limit of as low as 4.23 μM. Furthermore, the decrease in SPR band of APP-AuNPs due to Pd(II) ions was unaffected by tap water samples and/or human blood plasma.

Item Type: Article
Uncontrolled Keywords: Gold nanoparticles; Colorimetric sensing; Pd(II); Tap water; Human blood plasma
Subjects: Q Science > QD Chemistry
Q Science > QH Natural history
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 20 Sep 2019 02:43
Last Modified: 20 Sep 2019 02:43
URI: http://eprints.um.edu.my/id/eprint/22463

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