Dispersion degree and sheet spacing control of graphene products via oxygen functionalities and its effect on electrical conductivities of P3HT-graphene composite coatings

Becerra-Paniagua, Dulce K.; Cabrera-Germán, D.; Díaz-Cruz, Evelyn B.; Sotelo-Lerma, M.; Hu, Hailin

doi:10.1007/s10854-020-04489-y

Cited by 5 publications

(4 citation statements)

References 63 publications

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“…However, its reduction strength is not comparable to hydrazine. The obtained rGO products have a C/O range of 2.7–6. , Up to now, the most effective reductants for GO reduction have been hydroiodic acid or metal iodide. The rGO samples reduced by 55% hydroiodic acid (HI) at 100 °C for 1 h reached a C/O ratio higher than 12 and a high conductivity of 29,800 S m –1 .…”

Section: Introductionmentioning

confidence: 99%

Tuning the Oxygen Content of Reduced Graphene Oxide and Effects on Its Properties

2021

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The need to recover the graphene properties in terms of electrical and thermal conductivity calls for the application of reduction processes leading to the removal of oxygen atoms from the graphene oxide sheet surface. The recombination of carbon−carbon double bonds causes a partial recovery of the original graphene properties mainly limited by the presence of residual oxygen atoms and lattice defects. However, the loss of polar oxygen-based functional groups renders the material dispersibility rather complicated. In addition, oxygen-containing functional groups are reaction sites useful to further bind active molecules to engineer the reduced graphene sheets. For these reasons, a variety of chemical processes are described in the literature to reduce the graphene oxide. However, it is greatly important to select a chemical process enabling a thin modulation of the residual oxygen content thus tuning the properties of the final product. In this work, we will present a chemicalprocessing technique based on the hydroiodic acid to carefully control the degree of residual oxidation. Graphene oxides were reduced using hydroiodic acid with concentrations from 0.06 to 0.95 mol L −1 . Their properties were characterized in detail and tested, and the results showed that their oxygen content was finely tuned from 33.6 to 10.7 atom %. This allows carefully tailoring the material properties with respect to the desired application, which is exemplified by the variation of the bulk resistance from 92 Ω to 14.8 MΩ of the film from the obtained rGO.

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Section: Introductionmentioning

confidence: 99%

Tuning the Oxygen Content of Reduced Graphene Oxide and Effects on Its Properties

2021

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“…8b). On the other hand, graphene sheets are relatively short, giving a size of 250 to 550 nm (Becerra-Paniagua et al, 2019;Becerra-Paniagua et al, 2020). Consequently, they can be randomly distributed within the P3HT matrices, as suggested by the higher surface roughness observed in the P3HT-rGO films (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Graphene oxide (GO) products were synthesized using a modified Tour method (Becerra-Paniagua et al, 2019). Reduced graphene oxide (rGO) products were produced by chemical reduction of GO (Becerra-Paniagua et al, 2020). Commercial products of single-walled carbon nanotubes (CNT, Sigma-Aldrich) were used as purchased.…”

Section: Deposition Of Different P3ht Thin Filmsmentioning

confidence: 99%

A comparative study of different poly(3-hexylthiophene)–carbon based hole transport layers on the stability of perovskite solar cells prepared under ambient conditions

Arias-Ramos

Hernández-Guzmán²,

Camacho-Cáceres³

et al. 2023

RMIQ

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“…The G band at 1579 cm −1 corresponded to the ordered network of sp 2 carbon atoms. The D" band at 1454 cm −1 was related to the amorphous phase [24,25]. The I D /I G ratio of RGO was measured as 1.00, whereas GO had an I D /I G ratio equal to 1.20 [26].…”

Section: Characteristics Of Rgomentioning

confidence: 97%

L-Glutamate Biosensor for In Vitro Investigations: Application in Brain Extracts

Razumiene,

Leo,

Gureviciene

et al. 2023

Chemosensors

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Investigations of L-glutamate release in living organisms can help to identify novel L-glutamate-related pathophysiological pathways, since abnormal transmission of L-glutamate can cause many neurological diseases. For the first time, a nitrogen-modified graphene oxide (GO) sample (RGO) is prepared through a simple and facile one-pot hydrothermal reduction of GO in the presence of 20 wt.% of the dye malachite green and is used for amperometric biosensing. The biosensor demonstrates adequate stability and is easy to prepare and calibrate. The biosensor detects the current generated during the electrooxidation of hydrogen peroxide released in the L-glutamate that is converted to the alpha-ketoglutarate catalyzed by L-glutamate oxidase. The biosensor consists of a semipermeable membrane, with L-glutamate oxidase (EC 1.4.3.11) immobilized in albumin and RGO and the working Pt electrode. First, the basic version of the L-glutamate biosensor is examined in PBS to investigate its sensitivity, reliability, and stability. To demonstrate the applicability of the L-glutamate biosensor in the analysis of complex real samples, quantification of L-glutamate in bovine brain extract is performed and the accuracy of the biosensor is confirmed by alternative methods. The enhanced version of the L-glutamate biosensor is applied for L-glutamate release investigations in a newly developed strain of rats (DAT-knockout, DAT-KO).

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Dispersion degree and sheet spacing control of graphene products via oxygen functionalities and its effect on electrical conductivities of P3HT-graphene composite coatings

Cited by 5 publications

References 63 publications

Tuning the Oxygen Content of Reduced Graphene Oxide and Effects on Its Properties

Tuning the Oxygen Content of Reduced Graphene Oxide and Effects on Its Properties

A comparative study of different poly(3-hexylthiophene)–carbon based hole transport layers on the stability of perovskite solar cells prepared under ambient conditions

L-Glutamate Biosensor for In Vitro Investigations: Application in Brain Extracts

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