Polymer scaffold layers of screen-printed electrodes for homogeneous deposition of silver nanoparticles: application to the amperometric detection of hydrogen peroxide.

Autor: Goud KY; BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860, Perpignan, France. ykotagiri@eng.ucsd.edu.; Department of Chemistry, National Institute of Technology, Warangal, Telangana, 506004, India. ykotagiri@eng.ucsd.edu.; Department of NanoEngineering, University of California San Diego, La Jolla, CA, 92093, USA. ykotagiri@eng.ucsd.edu., Kumar VS; BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860, Perpignan, France.; Department of Chemistry, National Institute of Technology, Warangal, Telangana, 506004, India., Hayat A; Interdisciplinary Research Centre in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore Campus, Islamabad, 54000, Pakistan., Catanante G; BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860, Perpignan, France., Gobi KV; Department of Chemistry, National Institute of Technology, Warangal, Telangana, 506004, India. drkvgobi@gmail.com., Marty JL; BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860, Perpignan, France. jlmarty@univ-perp.fr.
Jazyk: angličtina
Zdroj: Mikrochimica acta [Mikrochim Acta] 2019 Nov 19; Vol. 186 (12), pp. 810. Date of Electronic Publication: 2019 Nov 19.
DOI: 10.1007/s00604-019-3963-y
Abstrakt: A method is described for electrochemical oxidation of polymers on the surface of screen-printed electrodes (SPCE). These act as scaffold layers for homogeneous deposition of silver nanoparticles (AgNPs). Hexamethylenediamine (HMDA) and poly(ethylene glycol) were immobilized on the SPCE surface via electrochemical oxidation. AgNPs were then electrodeposited on the scaffolds on the SPCE. This type of different carbon chain containing materials like PEG and HMDA act as big tunnels for electron mobility and are useful for the homogenous deposition of AgNPs on the SPCE surface without agglomeration. The resulting sensor was applied to the determination of hydrogen peroxide (H 2 O 2 ) as a model analyte. It is found to display favorable catalytic and conductive properties towards the reduction of H 2 O 2 . Cyclic voltammetry and amperometry revealed that the modified electrode performs better than other modified SPCEs. Best operated at a potential of around -0.61 V (vs Ag|AgCl), the amperometric response is linear in the 10-180 μM H 2 O 2 concentration range and the detection limit is 1.5 μM. The sensor is stable and reproducible. The resultant sensor was appplied to toothpaste analysis, and good recovery values were gained. Graphical abstractSchematic representation of electropolymerization of poly(ethylene glycol) and hexamethylenediamine scaffold layers on screen-printed electrodes for homogeneous electrodeposition of silver nanoparticles. This electrode was applied for the amperometric determination of hydrogen peroxide.
Databáze: MEDLINE
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