tGraphene/ionic liquids nanocomposite gels were synthesized by an electrochemical etching approachand 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 Elec-tron Microscopy/Energy Dispersive X-Ray Analysis); FE-SEM/EDX (Field Emission-Scanning ElectronMicroscopy/Energy Dispersive X-Ray Analysis); XPS (X-Ray Photoelectron Spectroscopy); FT-IR (FourierTransform-Infrared Spectroscopy) and electrochemical techniques. After the characterization study,nanocomposite-gel paste electrodes were assembled, exhibiting a selective and specific detectiontoward the caffeic acid oxidation. Better performances in terms of linear range of concentration (from0.025 to 2.00 M), reproducibility (intra-; 1.40% and inter-electrode reproducibility-3.20%), sensitivity(3389/A mM−1cm−2), fast response time (2 s) and detection limit (0.005 mM) were obtained, in compar-ison with other chemically modified electrodes, described in literature for the caffeic acid detection. Thisnanocoposite-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.
Valentini, F., Roscioli, D., Carbone, M., Conte, V., Floris, B., Bauer, E., et al. (2015). Graphene and ionic liquids new gel paste electrodes for caffeic acid quantification. SENSORS AND ACTUATORS. B, CHEMICAL, 212, 248-255 [10.1016/j.snb.2015.02.033].
Graphene and ionic liquids new gel paste electrodes for caffeic acid quantification
VALENTINI, FEDERICA;CARBONE, MARILENA;CONTE, VALERIA;FLORIS, BARBARA;
2015-01-01
Abstract
tGraphene/ionic liquids nanocomposite gels were synthesized by an electrochemical etching approachand 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 Elec-tron Microscopy/Energy Dispersive X-Ray Analysis); FE-SEM/EDX (Field Emission-Scanning ElectronMicroscopy/Energy Dispersive X-Ray Analysis); XPS (X-Ray Photoelectron Spectroscopy); FT-IR (FourierTransform-Infrared Spectroscopy) and electrochemical techniques. After the characterization study,nanocomposite-gel paste electrodes were assembled, exhibiting a selective and specific detectiontoward the caffeic acid oxidation. Better performances in terms of linear range of concentration (from0.025 to 2.00 M), reproducibility (intra-; 1.40% and inter-electrode reproducibility-3.20%), sensitivity(3389/A mM−1cm−2), fast response time (2 s) and detection limit (0.005 mM) were obtained, in compar-ison with other chemically modified electrodes, described in literature for the caffeic acid detection. Thisnanocoposite-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.File | Dimensione | Formato | |
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