Graphene, the Swiss Army Knife of Nanomaterials Science

Ferrand, Amelie; Siaj, Mohamed; Claverie, Jérôme P.

doi:10.1021/acsanm.0c02055

Cited by 12 publications

(6 citation statements)

References 199 publications

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“…The integration of graphene and its derivatives has been previously documented [15][16][17][18][19][20][21]. Nevertheless, investigations on SPEs have been scarce in comparison, as most research focuses on modifying glassy carbon electrodes, with only a small number of studies concerning their application in the determination of other estrogens.…”

Section: Modifier/electrodementioning

confidence: 99%

Graphene-Based Electrodes for Monitoring of Estradiol

et al. 2023

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This study explores the potential use of graphene-based electrodes in the electrochemical determination of estradiol using amperometric techniques as a simple, enzyme-free approach. Graphene, a carbon-based nanomaterial, has been extensively investigated in materials science as a sensing material. Its remarkable properties, such as its high electron mobility and conductivity, robust mechanical characteristics, and good surface-to-volume ratio, have led to its adoption in numerous applications, including electrochemical sensing. Estradiol is a crucial sex hormone that affects metabolism and reproduction. However, excessive amounts may disrupt endocrine functions. Electrochemical sensors suffer from electrode fouling, leading to passivation that ultimately affects performance. We exploit the inherent properties of various types of graphene-based electrodes, including graphene screen-printed electrodes (GHSPE), electrochemically exfoliated graphene-modified electrodes (EEFGHSPE), and 3D graphene foam screen-printed electrodes (3D-GFSPE), for the amperometric studies. The electrochemical properties and structural characteristics of these sensors are evaluated using cyclic voltammetry and scanning electron microscopy. The analytical performance of these sensors is at an applied potential of +0.65 V (vs. Ag/AgCl) over the concentration range 0.83 to 4.98 μM estradiol. Sensitivities of 0.151 µAµM−1 cm−2, 0.429 µAµM−1 cm−2, and 0.273 µA µM−1 cm−2, with detection limits of 0.0041 µM, 0.097 µM, and 0.018 µM (S/N = 3), are found for GHPSPE, 3D-GFSPE and EEFGHSPE, respectively. The possibility of amperometrically determining the estradiol levels in a potable tap water sample are then investigated over the concentration range 0.83–4.98 µM.

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Section: Modifier/electrodementioning

confidence: 99%

Graphene-Based Electrodes for Monitoring of Estradiol

et al. 2023

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“…Since its discovery in 2004, graphene in both pristine and oxidized forms has been proposed for a wide variety of applications, ranging from nanocomposite material development to biomedical applications. − This two-dimensional (2D) material’s unique combination of characteristics, such as a high surface-to-volume ratio, excellent electrical properties, chemical resistance, thermal stability, and solubility in aqueous solutions, makes graphene oxide (GO) of particular interest for biomedical applications including label-free biosensing and, more recently, as a drug delivery carrier. ,,− For example, feasibility studies have shown that GO can be used as a drug carrier for the treatment of cancer, multiple sclerosis, and Alzheimer’s disease; in gene therapy; as an early disease-detecting biosensor for Parkinson’s disease, Alzheimer’s disease, and cancer; in glucose immunosensing; as a grafting composite for tissue engineering; and in cell imaging among other applications. ,,,− …”

Section: Introductionmentioning

confidence: 99%

Biocompatible Graphene Oxide Nanosheets Densely Functionalized with Biologically Active Molecules for Biosensing Applications

Lehner

Benz

Moshkalev

et al. 2021

ACS Appl. Nano Mater.

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Graphene oxide (GO) has immense potential for widespread use in diverse in vitro and in vivo biomedical applications owing to its thermal and chemical resistance, excellent electrical properties and solubility, and high surface-to-volume ratio. However, development of GO-based biological nanocomposites and biosensors has been hampered by its poor intrinsic biocompatibility and difficult covalent biofunctionalization across its lattice. Many studies exploit the strategy of chemically modifying GO by noncovalent and reversible attachment of (bio)molecules or sole covalent biofunctionalization of residual moieties at the lattice edges, resulting in a low coating coverage and a largely bioincompatible composite. Here, we address these problems and present a facile yet powerful method for the covalent biofunctionalization of GO using colamine (CA) and the poly(ethylene glycol) cross-linker that results in a vast improvement in the biomolecular coating density and heterogeneity across the entire GO lattice. We further demonstrate that our biofunctionalized GO with CA as the cross-linker provides superior nonspecific biomolecule adhesion suppression with increased biomarker detection sensitivity in a DNA-biosensing assay compared to the (3-aminopropyl)triethoxysilane cross-linker. Our optimized biofunctionalization method will aid the development of GO-based in situ applications including biosensors, tissue nanocomposites, and drug carriers.

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“…Graphene (Gr) is well known for its high electrical and thermal conductivities, − high optical transparency, and extremely high tensile strength . MoS 2 consists of one layer of molybdenum atoms sandwiched between two layers of sulfur atoms and exists in either a semiconducting phase (2H-MoS 2 ) or a metallic phase (1T-MoS 2 ). , 2H-MoS 2 is a direct band gap (1.9 eV) semiconductor, making it a great candidate for electronic, photonic energy harvesting, and photocatalysis applications. − …”

Section: Introductionmentioning

confidence: 99%

“Simple-Stir” Heterolayered MoS₂/Graphene Nanosheets for Zn–Air Batteries

Puglia

Malhotra

Chivukula

et al. 2021

ACS Appl. Nano Mater.

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A facile, one-pot, top-down, protein-assisted, simply-stir method to produce aqueous suspensions of MoS 2 /graphene hybrid (MoS 2 /Gr) nanoplatelets of up to 14 mg mL −1 for applications in sustainable, next-generation batteries is reported here. Bovine serum albumin (BSA) served as the exfoliant to rapidly produce high concentrations of the hybrid by simply stirring on a desk top stirrer without any specialized equipment. The reactor is amenable for continuous flow, allowing for scale-up to produce large quantities, 24/7, with minimal human intervention. Raman spectroscopy, X-ray diffraction, ultraviolet−visible spectroscopy, and energy-dispersive X-ray spectroscopy indicated the coexistence of both MoS 2 and graphene nanosheets in a majority of flakes. The Raman spectra indicated low defect, 3−4 layer graphene sheets with very low oxidation levels, as well as 4−8 layer MoS 2 flakes. The exfoliation mechanism was studied as a function of the concentrations of bulk MoS 2 , graphite, protein, as well as the stirring speed, pH, and temperature. The reaction orders with respect to these parameters were determined. Temperature dependence data indicated a thermal energy barrier of 19.1 kJ/mol, but the rpm dependence gave an extremely low shear energy barrier of 22.2 nJ/mol. One unique insight gained here is that the lateral destacking of the platelets via translational excitation induced by stirring populates higher translational states in the direction along the solvent flow. Thus, stirring is very efficient in destacking the platelets at a low energy cost, a mechanism for efficient exfoliation of two-dimensional materials. The cyclic voltammograms of the MoS 2 /Gr hybrid with a 1:13 mole ratio showed enhanced oxygen reduction activities, nearly double that of Gr nanosheets or ∼25-fold that of MoS 2 nanosheets, and vastly higher than those of both the bulk phases. The hybrid with a 1:13 mole ratio was used to fabricate flexible, functional, and bioabsorbable/biodegradable Zn−air batteries with high open circuit voltages (1.4 V) and high specific energy of up to 130 W h kg −1 , establishing practical applications of the hybrids over the individual nanosheets.

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Graphene, the Swiss Army Knife of Nanomaterials Science

Abstract: Figure 1. Many uses of GBNs, with applications in environmental protection and remediation, separation technologies, sensing, biomedical diagnostics, catalysis, functional materials, electronic devices and processes, and finally energy-related technologies.

Cited by 12 publications

References 199 publications

Graphene-Based Electrodes for Monitoring of Estradiol

Graphene-Based Electrodes for Monitoring of Estradiol

Biocompatible Graphene Oxide Nanosheets Densely Functionalized with Biologically Active Molecules for Biosensing Applications

“Simple-Stir” Heterolayered MoS₂/Graphene Nanosheets for Zn–Air Batteries

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Graphene, the Swiss Army Knife of Nanomaterials Science

Abstract: Figure 1. Many uses of GBNs, with applications in environmental protection and remediation, separation technologies, sensing, biomedical diagnostics, catalysis, functional materials, electronic devices and processes, and finally energy-related technologies.

Cited by 12 publications

References 199 publications

Graphene-Based Electrodes for Monitoring of Estradiol

Graphene-Based Electrodes for Monitoring of Estradiol

Biocompatible Graphene Oxide Nanosheets Densely Functionalized with Biologically Active Molecules for Biosensing Applications

“Simple-Stir” Heterolayered MoS2/Graphene Nanosheets for Zn–Air Batteries

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Product

Resources

About

“Simple-Stir” Heterolayered MoS₂/Graphene Nanosheets for Zn–Air Batteries