Liquid-phase exfoliated graphene self-assembled films: Low-frequency noise and thermal-electric characterization

Usca, Gabriela Tubon; Hernandez-Ambato, Jorge; Pace, Calogero; Caputi, Lorenzo; Tavolaro, Adalgisa

doi:10.1016/j.apsusc.2016.01.115

Cited by 16 publications

(5 citation statements)

References 43 publications

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“…Among them, the liquid-phase exfoliation is the most commonly used method to prepare graphene by sonication at a low cost and with minimal environmental impact. However, this method mostly involves the use of high-boiling point solvents, e.g., N-methyl-pyrrolidone (NMP) [8] and a long sonication time to reach high concentrations of dispersed graphene [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Few-Layer Graphene Dispersions from Hydrothermally Expanded Graphite

et al. 2019

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In this study, we propose a novel approach to prepare few-layer graphene (FLG) dispersions, which is realized by exfoliating natural graphite flakes in a surfactant aqueous solution under hydrothermal treatment and liquid-phase exfoliation. In order to obtain stable and well-dispersed FLG dispersions, pristine graphite is hydrothermally expanded in a hexadecyltrimethylammonium bromide (CTAB) aqueous solution at 180 °C for 15 h, followed by sonication up to 3 h. In comparison to long-time sonication methods, the present method is significantly efficient, and most importantly, does not involve the use of an oxidizing agent and hazardous media, which will make it more competent in the scalable production of graphene.

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Section: Introductionmentioning

confidence: 99%

Preparation of Few-Layer Graphene Dispersions from Hydrothermally Expanded Graphite

et al. 2019

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“…The liquid exfoliation method has been reported as a simple and feasible approach in high yield production of 2D materials. Various 2D nanosheets, including graphene, TMDs, and phosphorene , have been successfully synthesized with the liquid exfoliation method. In this method, powders of layered materials are sonicated with solvents including N -methylpyrrolidone (NMP), dimethylformamide (DMF), and isopropyl alcohol (IPA) for several hours to obtain the dispersions that contain nanosheets with different thicknesses and sizes .…”

Section: Introductionmentioning

confidence: 99%

Liquid Exfoliation Few-Layer SnSe Nanosheets with Tunable Band Gap

Huang

Lin

et al. 2017

J. Phys. Chem. C

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Two-dimensional (2D) materials have recently drawn tremendous attention because of their novel properties and potential applications in high-speed transistors, solar cells, and catalysts. Few-layer SnSe is a new member of the 2D family with excellent performance in optoelectronic and thermoelectric devices. It is necessary to synthesize few-layer SnSe nanosheets in large scale for various applications. In this work, we develop a scalable liquid-phase exfoliation method to synthesize high-quality crystalline SnSe nanosheets. The morphology and microstructure of SnSe nanosheets are systematically investigated with high-resolution transmission electron microscopy, atomic force microscopy, and Raman spectroscopy. The thinnest nanosheets are bilayered. The optical absorption properties of SnSe nanosheets from near-infrared to ultraviolet light are studied. It is worth noting that the band gap of the nanosheets monotonically increases with the reduction of the nanosheet thickness. The electronic structure of SnSe nanosheets with various thicknesses is calculated by first-principles calculations, the evolution of the band gap as a function of the nanosheet thickness is confirmed, and the mechanism of the band gap evolution is discussed. Our work paves the way for the scalable synthesis of 2D SnSe with tunable optical absorption and band gap, which has potential for use in photoelectronic and photocatalytic applications.

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“…When the NBA molar ratio reaches 1 : 4, the graphene content is only 0.09 mg/mL, and when the molar ratio reaches 1 : 3, it is only one-72nd, and it also shows that this ratio will make the n-butanol molecule internal self-bonding generated, so that the individual DMF solution can be stripped to obtain graphene, but different mixed solutions can neither guarantee the dispersion stability of graphene nor the stability of the graphene diffusion liquid, so different mixed solutions can affect graphene. The diffusion concentration produced a great difference [13]. This type of research lacks data support, and the conclusions drawn are still open to question.…”

Section: Introductionmentioning

confidence: 97%

Mathematical Model and Simulation Calculation Method Based on the Exfoliation of Single‐Layer Graphene from Dispersed Carbon Nanotubes

Sha

Zhao

2022

Journal of Nanomaterials

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Graphene is a two-dimensional material with excellent performance and unique structure. Since its successful manufacturing in 2004, it has quickly become a research hotspot in the fields of materials, chemistry, physics, and engineering. This article focuses on the study of exfoliated single-layer graphene based on dispersed carbon nanotubes and understands the related theories of carbon nanotubes and exfoliated single-layer graphene on the basis of literature data. The mathematical model and simulation calculation method are analyzed, and then, the effect of the single-layer graphene peeling based on the dispersed carbon nanotubes is tested, mainly to the experimental verification of the peeling process parameters and the influence of the dispersant on the peeling effect, and then, the peeled graphite quality of the graphene was tested, and the test results showed that the thickness of single-layer pure graphene is 0.6-0.9 nm, and the experimental statistics show that the graphene of single-layer and double-layer occupies 81% of the experimental sample; most of the single-layer graphene exfoliated based on dispersed carbon nanotubes in this paper is single-layer, two-layer graphene, and a relatively small amount of multilayer graphene.

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Liquid-phase exfoliated graphene self-assembled films: Low-frequency noise and thermal-electric characterization

Cited by 16 publications

References 43 publications

Preparation of Few-Layer Graphene Dispersions from Hydrothermally Expanded Graphite

Preparation of Few-Layer Graphene Dispersions from Hydrothermally Expanded Graphite

Liquid Exfoliation Few-Layer SnSe Nanosheets with Tunable Band Gap

Mathematical Model and Simulation Calculation Method Based on the Exfoliation of Single‐Layer Graphene from Dispersed Carbon Nanotubes

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