Self-assembly of gold nanoparticles on sulphide functionalized polydopamine in application to electrocatalytic oxidation of nitric oxide
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Self-assembly of gold nanoparticles on sulphide functionalized polydopamine in application to electrocatalytic oxidation of nitric oxide
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| Creator |
Ananthi, Arjunan
Phani, KLN |
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| Subject |
Electrodics and Electrocatalysis
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| Description |
facile synthetic approach is used to prepare sulphide-functionalized polydopamine (S-PDA) via spontaneous
self-polymerization of dopamine (DA) on glassy carbon (GC) substrate at room temperature. A GC electrode is
immersed in a solution containing DA, carbon disulphide (CS2), triethylamine (TEA) and ethanol which renders
the GC surface sulphide-functionalized. Subsequently, citrate-stabilized gold nanoparticles (AuNPs) are attached
to the S-PDA/GC surface via Au–S linkages. Fourier transformed infrared spectroscopy (FT-IR), X-ray photoelectron
spectroscopy (XPS), UV–visible spectroscopy, field emission-scanning electron microscopy (FE-SEM), atomic
force microscopy (AFM) and cyclic voltammetric analyses are used to confirm spontaneous attachment of
AuNPs to the S-PDA/GC surface. The electrocatalytic activity of the as-synthesized AuNPs/S-PDA/GC
electrode is studied for the oxidation of nitric oxide (NO) by employing cyclic voltammetric and
chronoamperometric techniques. The AuNPs/S-PDA/GC electrode exhibits excellent electrocatalytic
activity towards NO oxidation (0.489 V) by reducing the oxidation overpotential from 0.293 and 0.176 V
with 2.5 times higher current sensitivity compared to S-PDA/GC (0.782 V) and bare GC electrodes
(0.665 V) respectively. Further, the sensitivity and selectivity of the AuNPs/S-PDA/GC electrode are
examined by using amperometry and the obtained results suggested that the proposed sensor probe
exhibits excellent selectivity for NO in presence of commonly interfering biomolecules such as glucose,
ascorbic acid, dopamine and uric acid along with very good reproducibility and long-term stability
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| Publisher |
Elsevier B.V.
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| Date |
2016
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3166/1/093-2016.pdf
Ananthi, Arjunan and Phani, KLN (2016) Self-assembly of gold nanoparticles on sulphide functionalized polydopamine in application to electrocatalytic oxidation of nitric oxide. Journal of Electroanalytical Chemistry, 764. pp. 7-14. ISSN 1572-6657 |
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| Relation |
http://www.elsevier.com/locate/jelechem
http://cecri.csircentral.net/3166/ |
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