An innovative ECL sensor based on AuNPs linker for Ru(bpy)32+ molecules doped onto an alkaline pretreated poly(4-aminodiphenylamine) film
| Autor: | Mohammed M. Al-Hinaai, Emad A. Khudaish, Salim Al-Harthi, Htet Htet Kyaw |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences X-ray photoelectron spectroscopy Materials Chemistry Molecule Electrical and Electronic Engineering Instrumentation chemistry.chemical_classification Metals and Alloys Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ruthenium Dielectric spectroscopy chemistry Chemical engineering Colloidal gold 0210 nano-technology Luminescence |
| Zdroj: | Sensors and Actuators B: Chemical. 257:460-468 |
| ISSN: | 0925-4005 |
| Popis: | An innovative construction approach relies on incorporation of gold nanoparticles (AuNPs) as a sandwich linking species between two assembled layers composed of tris(2,2′-bipyridyl)ruthenium(II), Ru(bpy)32+. The entire luminescent system is doped at an alkaline treated polymeric film made of poly(4-aminodiphenylamine), t-Padpa, originally deposited at the glassy carbon electrode by repetitive electrochemical scanning. The surface morphology and the composition of the proposed (Ru.AuNPs.Ru.t-Padpa) sensor along with its electrochemical properties were studied using Atomic Force Microscopy (AFM), X-Ray Photoelectron Spectroscopy (XPS) and Electrochemical Impedance Spectroscopy (EIS) methods The analytical performance of the developed sensor and its stability were tested using tripropyl amine (TPA) as a typical co-reactant in the development of ECL sensors. The ECL system shows a remarkable sensitivity towards TPA quantification with a detection limit (3σ) of 10 nM (1.4 ppb). The proposed sensor exhibited a greater efficiency and higher stability over the native ruthenium doped polymer (Ru.t-Padpa) evaluated by its performance for a certain shelf life-time. The present approach confirms the fabrication of a robust and efficient sensor characterized by the parallel operative effects of both AuNPs and the available concentrated surface luminescent molecules. |
| Databáze: | OpenAIRE |
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