High-quality liquid phase-pulsed laser ablation graphene synthesis by flexible graphite exfoliation

Jalili, Mansoureh; Ghanbari, Hajar; Bellah, S. Moemen; Malekfar, Rasoul

doi:10.1016/j.jmst.2018.09.048

Cited by 27 publications

(20 citation statements)

References 49 publications

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“…The carbon materials commonly used in supercapacitors include activated carbon, carbon fiber, carbon nanotubes, and graphene etc . Graphene is a crystalline material arranged along a hexagonal lattice of carbon atoms and extended in two dimensions infinitely enabling it to endow many excellent properties, such as high electrical conductivity and good mechanical properties . Therefore, graphene‐based materials have attracted increasing attention and been widely employed for energy storage and conversion devices .…”

Section: Introductionmentioning

confidence: 99%

Aniline‐grafting graphene oxide/polyaniline composite prepared via interfacial polymerization with high capacitive performance

Wang

et al. 2019

Int J Energy Res

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Summary Polyaniline (PANI), a low‐cost conducting polymer with an excellent specific capacitance and a high conductivity, is a promising organic material served for supercapacitor. However, it tends to curl and swell after constant charge and discharge, resulting in poor cycle stability. In this work, we employed the interfacial polymerization route to construct an aniline‐grafting graphene oxide/PANI (GO‐ANI/PANI) composite. The as‐prepared GO‐ANI/PANI composite shows a high specific capacitance (160.5 F g‐1) at 0.5 A g‐1 under the wide potential range from 0.0 to 1.0 V. Importantly, at a high current density (10 A g‐1), the capacitance retains 86% after 3000 cycles due to the enhanced interaction between GO and PANI and good conductive network. It has been demonstrated that the GO‐ANI/PANI composite has a higher specific capacitance and better stability compared with GO/PANI obtained by common method. This study implies that the composite electrode could be a competitive candidate for high‐performance supercapacitor.

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Section: Introductionmentioning

confidence: 99%

Aniline‐grafting graphene oxide/polyaniline composite prepared via interfacial polymerization with high capacitive performance

Wang

et al. 2019

Int J Energy Res

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“…Broadly, three treatment methods are adopted to obtain modified graphite forms termed as graphene oxide, graphite intercalated compound (GIC) and expanded graphite (EG) [1]. The types of nanographite materials have developed significantly due to the coexistence of different superior properties and numerous innovative synthesis methods [2]. EG is a highly prospective nanographite material due to its unique properties including very low density, high aspect ratio, high porous structure, closest electrical/thermal conductivity and thermal/chemical stability to natural graphite and ease of preparation and low cost.…”

Section: Introductionmentioning

confidence: 99%

The effect of graphite intercalated compound particle size and exfoliation temperature on porosity and macromolecular diffusion in expanded graphite

Goudarzi

Motlagh

2019

Heliyon

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The pore structure of expanded graphite (EG) including pore volume, pore size distribution and surface area is investigated by mercury porosimetry, nitrogen adsorption and SEM. Also, the diffusion of silicone oil molecules as macromolecules with different molecular weights into EG pores is studied. Various EG samples were prepared by the sudden heating of graphite intercalated compound (GIC) with varying particle size of 35, 50, 80 and 200 meshes in an electrical furnace at temperatures of 700, 800 and 900 °C. The EGs were characterized by FTIR to evaluate the presence of functional groups. It was found that the exfoliation process has not significantly introduced oxygen functional groups such as epoxy and carboxyl groups to the EG structure. Therefore the chemical structure of the EG is very close to pristine graphite. The mercury porosimetry results showed a broad range of total pore area from 5 to 31 m2/g for the EGs. The particle size of GIC and exfoliation temperature showed strong effects on the pore size of EG. The mercury intrusion porosimetry and nitrogen adsorption isotherms revealed that μm-pores are dominant as compared with nm-pores in all EG samples. The diffusion of silicone oils as macromolecular guests with three different viscosities was experimentally studied to analyze the diffusion facts of EG as the host. It was observed that as the exfoliation temperature decreases, the sorption capacity decreases; and EG samples prepared from the GICs with smaller particle size have lower sorption capacity. Sorption experiments also showed that the whole pore volume of EG is not filled with silicone oil leading to this fact that EG includes relatively closed pores. A new model was suggested for the sorption capacity of EG as a function of the pore area of EG and the square root of molecular weight of silicone oil.

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“…Optical modification methods have been widely used to improve the direct synthesis of large‐area 2D materials. Among these methods, we focus on laser‐assisted CVD (LCVD), [ 14,45–54 ] optical synthesis of TMDs, [ 55 ] laser‐assisted liquid phase exfoliation (LPE), [ 56,57 ] laser‐induced graphene synthesis, [ 58,59 ] and highly controllable laser ablation and thinning [ 24–28,60–64 ] of a bulk material down to a monolayer. As all of these methods use lasers as the light sources, the processes are easily tuned with laser parameters, such as power, [ 50–52,65 ] fluence, [ 65 ] wavelength, [ 47,50–54 ] scanning speed, [ 49,50,52 ] illumination time, [ 51,54 ] and thermal cycle time.…”

Section: Laser‐based Synthesis and Fabricationmentioning

confidence: 99%

“…Laser-assisted liquid phase exfoliation typically utilizes the thermal energy of light to exfoliate 2D materials [56,57,65] (Figure 3d). Light with sufficient energy can be used to break the CC bonds of the material via ablation, and the fluence of the light can be used to tune the fragment size.…”

Section: Laser-assisted Lpementioning

confidence: 99%

“…[65] The biggest advantages of laser-assisted liquid phase exfoliation are its simplicity and fast processing speed, which is 3 times faster than the conventional liquid phase exfoliation. [56] Moreover, tunable laser parameters provide control over flake size [56,57] and morphology. [65] Additionally, using lasers with extremely short pulse duration circumvents the disruptive thermal effects, for example, reducing defects that are typically created with continuous wave lasers.…”

Section: Laser-assisted Lpementioning

confidence: 99%

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Optical Modification of 2D Materials: Methods and Applications

2022

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on the same chip, which is promising for integrated electronics or photonics applications, [7] such as lasers, [8][9][10] optical modulators, [11] and photodetectors. [12] Indeed, 2D materials are an excellent candidate for postsilicone electronics due to their unique properties, versatile scaling of channel length, reduced device dimensionalities, and the possibility of creating circuits nearly at the atomic level. [13] Currently, some of the biggest challenges for 2D material synthesis include the lack of large-scale manufacturing and the necessity of harsh or arduous microand nanofabrication methods. Typical fabrication methods are based on chemical vapor deposition (CVD) and mechanical exfoliation from bulk crystals. The former involves a process that results in layers with relatively high concentrations of atomic impurities, [14] and the latter is limited in producing large area flakes. [14] Further fabrication steps for the incorporation of 2D materials into integrated devices typically require processes like electron-beam lithography and reactive ion etching, [15] both of which can be harmful to flakes that are atomically thin.All-optical processing of 2D materials has been demonstrated to overcome limitations of the conventional synthesis methods. It is time-and cost-effective, and it is also a promising fabrication alternative over CVD and mechanical exfoliation. Optical modification processes offer selectivity, locality, directionality, tunability, less harmful conditions, and on-demand functionalities, such as optical doping, [16][17][18][19] oxidation, [20][21][22][23] optical thinning, [24][25][26][27][28] and phase change. [29][30][31][32] Additionally, almost all of the optical modification and fabrication methods can be used for laser-direct writing (LDW) of patterns and structures at the microscale. [33][34][35][36] The high precision of LDW is particularly advantageous in the evolving world of nanofabrication. Lasers allow local modification of 2D material electronic bandgap, [37] thickness, [25] strain, [33,[38][39][40] and chemical composition, [19,41,42] even beyond the diffraction limit. [33] The created structures and patterns can often be directly used for applications in sensors, [22] energyprocessing devices, [43] and holography [44] (Figure 1). All the major demonstrations using LDW on 2D materials are listed in Table 1. Here, we review the optically assisted synthesis and fabrication methods of 2D materials, and their state-of-theart applications, providing detailed descriptions and features of optically engineered devices using 2D materials. We have straightforwardly introduced light-matter interactions and 2D-material-light interactions, and we also present our perspectives on this emerging field.2D materials are under extensive research due to their remarkable properties suitable for various optoelectronic, photonic, and biological applications, yet their conventional fabrication methods are typically harsh and costineffective. Optical modification is demonstrated as an effective an...

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High-quality liquid phase-pulsed laser ablation graphene synthesis by flexible graphite exfoliation

Cited by 27 publications

References 49 publications

Aniline‐grafting graphene oxide/polyaniline composite prepared via interfacial polymerization with high capacitive performance

Aniline‐grafting graphene oxide/polyaniline composite prepared via interfacial polymerization with high capacitive performance

The effect of graphite intercalated compound particle size and exfoliation temperature on porosity and macromolecular diffusion in expanded graphite

Optical Modification of 2D Materials: Methods and Applications

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