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Study on Hybrid Assemblies of Graphene and Conducting Polymers with Embedded Gold Nanoparticles for Potential Electrode Purposes

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Publicado no:Chemosensors vol. 13, no. 4 (2025), p. 130
Autor principal: Trandabat, Alexandru F
Outros Autores: Schreiner, Oliver Daniel, Schreiner, Thomas Gabriel, Plopa Olga, Ciobanu, Romeo Cristian
Publicado em:
MDPI AG
Assuntos:
United States > US
Gold
Sulfuric acid
Nanoparticles
Electrodes
Polyanilines
Oxidation
Polymer films
Metallizing
Grain size
Graphene
Polymers
Inkjet printing
Insertion
Scanning electron microscopy
Printers (data processing)
Propanol
Chemical sensors
Conducting polymers
Nanostructure
Dip coatings
Biomedical materials
Sensors
Chemical vapor deposition
Methods
Immersion coating
Silver
Casting inserts
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Resumo:This article outlines the method of creating electrodes for electrochemical sensors using hybrid nanostructures composed of graphene and conducting polymers with insertion of gold nanoparticles. The technology employed for graphene dispersion and support stabilization was based on the chemical vapor deposition technique followed by electrochemical delamination. The method used to obtain hybrid nanostructures from graphene and conductive polymers was drop-casting, utilizing solutions of P3HT, PANI-EB, and F8T2. Additionally, the insertion of gold nanoparticles utilized an innovative dip-coating technique, with the graphene-conducting polymer frameworks submerged in a HAuCl4/2-propanol solution and subsequently subjected to controlled heating. The integration of gold nanoparticles differs notably, with P3HT showing the least adhesion of gold nanoparticles, while PANI-EB exhibits the highest. An inkjet printer was employed to create electrodes with metallization accomplished through the use of commercial silver ink. Notable variations in roughness (grain size) result in unique behaviors of these structures, and therefore, any potential differences in the sensitivity of the generated sensing structures can be more thoroughly understood through this spatial arrangement. The electrochemical experiments utilized a diluted sulfuric acid solution at three different scan rates. The oxidation and reduction potentials of the structures seem fairly alike. Nevertheless, a notable difference is seen in the anodic and cathodic current densities, which appear to be largely influenced by the active surface of gold nanoparticles linked to the polymeric grains. The graphene–PANI-EB structure with Au nanoparticles showed the highest responsiveness and will be further evaluated for biomedical applications.
ISSN:2227-9040
DOI:10.3390/chemosensors13040130
Fonte:Materials Science Database