Graphene and ionic liquids new gel paste electrodes for caffeic acid quantification

Delia Francesca Chillura Martino, Eugenio Caponetti, Luigia Sabbatini, Davide Roscioli, Valeria Conte, Nicoletta Ditaranto, Barbara Floris, Marilena Carbone, Bauer, Federica Valentini

Risultato della ricerca: Articlepeer review

24 Citazioni (Scopus)

Abstract

Graphene/ionic liquids nanocomposite gels were synthesized by an electrochemical etching approach and fully characterized under a morphological and structural point of view. For this purpose, several analytical techniques were applied, as HR-TEM/EDX (High Resolution-Transmission Electron Microscopy/Energy Dispersive X-Ray Analysis); FE-SEM/EDX (Field Emission-Scanning Electron Microscopy/Energy Dispersive X-Ray Analysis); XPS (X-Ray Photoelectron Spectroscopy); FT-IR (Fourier Transform-Infrared Spectroscopy) and electrochemical techniques. After the characterization study, nanocomposite-gel paste electrodes were assembled, exhibiting a selective and specific detection toward the caffeic acid oxidation. Better performances in terms of linear range of concentration (from 0.025 to 2.00 M), reproducibility (intra-; 1.40% and inter-electrode reproducibility-3.20%), sensitivity (3389/μA mM-1 cm-2), fast response time (2 s) and detection limit (0.005 mM) were obtained, in comparison with other chemically modified electrodes, described in literature for the caffeic acid detection. This nanocoposite-gel could represent a new prototype of miniaturized nanostructured sensors useful for the "in situ" quantification of an important molecule, having pharmacological properties, anti-inflammatory, antibacterial, antiviral, immunomodulatory and antioxidant effects.
Lingua originaleEnglish
pagine (da-a)248-255
Numero di pagine8
RivistaSENSORS AND ACTUATORS. B, CHEMICAL
Volume212
Stato di pubblicazionePublished - 2015

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.3100.3105???
  • ???subjectarea.asjc.3100.3104???
  • ???subjectarea.asjc.2500.2508???
  • ???subjectarea.asjc.2500.2506???
  • ???subjectarea.asjc.2200.2208???
  • ???subjectarea.asjc.2500.2505???

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