Gold nanoparticles modified graphene platforms for highly sensitive electrochemical detection of vitamin C in infant food and formulae

Bettazzi, Francesca; Ingrosso, Chiara; Sfragano, Patrick Severin; Pifferi, V.; Falciola, L.; Curri, Maria Lucia; Palchetti, Ilaria

doi:10.1016/j.foodchem.2020.128692

Cited by 45 publications

(19 citation statements)

References 38 publications

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“…Thus, the highest current signal of the PCA-RGO/Au NPs C-SPEs has been ascribed to the increase of the electrode conductivity and to the enhancement of the heterogeneous electron transfer kinetics at the electrode/electrolyte interface. This has been also due to the presence of the PCA linker anchored onto the RGO basal plane by π-π interactions, which acts as an electron coupling agent between the Au NPs and RGO [4,27,30]. In addition, Figures 2B-D have shown that, in each investigated electrolyte, the PCA-RGO/Au NPs C-SPEs exhibit an electrochemical behavior in presence of the inner sphere redox probe, that differs from The cyclic voltammograms of the C-SPEs modified by PCA-RGO/Au NPs, DMBT-Au NPs and PCA-RGO@Au NPs have shown, in NaClO 4 , two cathodic peaks at ca.…”

Section: Electrochemical Characterization Of the Pca-rgo/au Nps Hybri...mentioning

confidence: 99%

Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

et al. 2022

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Electrochemical sensors integrating hybrid nanostructured platforms are a promising alternative to conventional detection techniques for addressing highly relevant challenges of heavy metal determination in the environment. Hybrid nanocomposites based on graphene derivatives and inorganic nanoparticles (NPs) are ideal candidates as active materials for detecting heavy metals, as they merge the relevant physico-chemical properties of both the components, finally leading to a rapid and sensitive current response. In this work, a hybrid nanocomposite formed of reduced graphene oxide (RGO) sheets, surface functionalized by π-π interactions with 1-pyrene carboxylic acid (PCA), and decorated in situ by Au NPs, was synthesized by using a colloidal route. The hybrid nanocomposite was characterized by cyclic voltammetry and electrochemical impedance spectroscopy with respect to the corresponding single components, both bare and deposited as a layer-by-layer junction onto the electrode. The results demonstrated the high electrochemical activity of the hybrid nanocomposite with respect to the single components, highlighting the crucial role of the nanostructured surface morphology of the electrode and the PCA coupling agent at the NPs-RGO interphase in enhancing the nanocomposite electroactivity. Finally, the Au NP-decorated PCA-RGO sheets were tested by anodic stripping voltammetry of As(III) ion—a particularly relevant analyte among heavy metal ions—in order to assess the sensing ability of the nanocomposite material with respect to its single components. The nanocomposite has been found to present a sensitivity higher than that characterizing the bare components, with LODs complying with the directives established by the U.S. EPA and in line with those reported for state-of-the-art electrochemical sensors based on other Au-graphene nanocomposites.

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Section: Electrochemical Characterization Of the Pca-rgo/au Nps Hybri...mentioning

confidence: 99%

Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

et al. 2022

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“…), Reduced Graphene Oxide (RGO) nanocomposite in situ decorated with gold nanoparticles, Au nanorods-functionalized nanostructured TiO 2 transparent electrodes, conductive polymers (polypyrrole, polyaniline polythiophene, etc.) have demonstrated to enhance the features of SPEs in terms of cost-effectiveness, biocompatibility, conductivity, mechanical resistance and micro-environment stabilizers [ [52] , [53] , [54] , [55] , [56] , [57] , [58] , [59] , [60] , [61] , [62] , [63] , [64] , [65] ].…”

Section: Tips On Spes Manufacture and Customizationmentioning

confidence: 99%

Nano-engineered screen-printed electrodes: A dynamic tool for detection of viruses

Sher

Faheem

Asghar

et al. 2021

TrAC Trends in Analytical Chemistry

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There is a growing interest in the development of portable, cost-effective, and easy-to-use biosensors for the rapid detection of diseases caused by infectious viruses: COVID-19 pandemic has highlighted the central role of diagnostics in response to global outbreaks. Among all the existing technologies, screen-printed electrodes (SPEs) represent a valuable technology for the detection of various viral pathogens. During the last five years, various nanomaterials have been utilized to modify SPEs to achieve convincing effects on the analytical performances of portable SPE-based diagnostics. Herein we would like to provide the readers a comprehensive investigation about the recent combination between SPEs and various nanomaterials for detecting viral pathogens. Manufacturing methods and features advances are critically discussed in the context of early-stage detection of diseases caused by HIV-1, HBV, HCV, Zika, Dengue, and Sars-CoV-2. A detailed table is reported to easily guide readers toward the “right” choice depending on the virus of interest.

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“…On the other hand, the use of Au NPs in electrochemical (bio)sensors is advantageous for their capability of binding biomolecules, high rate of heterogeneous electron transfer kinetics, and excellent surface redox electrocatalytic activity [ 17 ]. The combination of the graphene derivatives with Au NPs in hybrid nanocomposites empowers interphase electron coupling, yields materials with a very large electrochemically active surface area, and enhanced heterogeneous electron transfer kinetics, resulting in a rapid and sensitive current response [ 18 , 19 , 20 ]. Therefore, nanostructured platforms formed by these hybrid nanocomposites have been applied for the electroanalytical determination of a variety of analytes, including N 2 H 4 , 4-NP, and Hg 2+ [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

“…Disposable screen-printed carbon electrodes (SPCEs), modified by hybrid nanocomposites formed by reduced graphene oxide (rGO), functionalized with 1-pyrene carboxylic acid (PCA) and decorated by a dense layer of Au NPs (AuNPs/PCA-rGO/SPCEs), which have been recently demonstrated well-performing for the detection of a variety of analytes including cancer biomarker in human blood serum [ 18 ], vitamin C in food products [ 19 ] and As(III) in water [ 20 ], have been here investigated for the electrocatalytic detection of N 2 H 4 and 4-NP, and after modification with Hg 2+ ions imprinted polycurcumin (polyCM) films, for the electroanalytical quantification of Hg 2+ by differential pulse voltammetry.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Sensors Based on Au Nanoparticles Decorated Pyrene-Reduced Graphene Oxide for Hydrazine, 4-Nitrophenol and Hg2+ Detection in Water

Mejri

Mandriota²,

Elfil³

et al. 2022

Molecules

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Monitoring hazardous chemical compounds such as hydrazine (N2H4), 4-nitrophenol (4-NP) and Hg2+ in natural water resources is a crucial issue due to their toxic effects on human health and catastrophic impact on the environment. Electrochemical nanostructured platforms integrating hybrid nanocomposites based on graphene derivatives and inorganic nanoparticles (NPs) are of great interest for such a purpose. In this work, disposable screen-printed carbon electrodes (SPCEs) have been modified with a hybrid nanocomposite formed by reduced graphene oxide (RGO), functionalized by 1-pyrene carboxylic acid (PCA), and decorated by colloidal Au NPs. These hybrid platforms have been tested for the electrocatalytic detection of N2H4 and 4-NP by differential pulse voltammetry and have been modified with an electropolymerized film of Hg2+ ions imprinted polycurcumin for the electroanalytical detection of Hg2+ by DPV. LODs, lower and in line with the lowest ones reported for state-of-the-art electrochemical sensors, integrating similar Au-graphene <nanocomposites, have been estimated. Additionally, good repeatability, reproducibility, and storage stability have been assessed, as well as a high selectivity in the presence of a 100-fold higher concentration of interfering species. The applicability of the proposed platforms for the detection of the compounds in real complex matrices, such as tap and river water samples, has been effectively demonstrated.

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Gold nanoparticles modified graphene platforms for highly sensitive electrochemical detection of vitamin C in infant food and formulae

Cited by 45 publications

References 38 publications

Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

Au Nanoparticles Decorated Graphene-Based Hybrid Nanocomposite for As(III) Electroanalytical Detection

Nano-engineered screen-printed electrodes: A dynamic tool for detection of viruses

Electrochemical Sensors Based on Au Nanoparticles Decorated Pyrene-Reduced Graphene Oxide for Hydrazine, 4-Nitrophenol and Hg2+ Detection in Water

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