Efficient defect healing and ultralow sheet resistance of laser-assisted reduced graphene oxide at ambient conditions

Αντωνέλου, Ασπασία; Sygellou, Labrini; Vrettos, Katerina; Georgakilas, Vasilios; Yannopoulos, Spyros N.

doi:10.1016/j.carbon.2018.07.012

Cited by 28 publications

(18 citation statements)

References 34 publications

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“…Epichlorohydrin (Alfa Aesar, Kandel, Germany), sodium hydroxide (NaOH, Sigma-Aldrich, St Louis city, MO, USA), ammonium hydroxide (NH 3 , CARLO ERBA Reagents S.A.S., Barcelona, Spain), TETA (Sigma-Aldrich, St Louis city, MO, USA), nitric acid (HNO 3 , 65%, CARLO ERBA Reagents S.A.S., Barcelona, Spain), and powder graphite (Sigma-Aldrich, St Louis city, MO, USA) were used without further treatment. GO was prepared in the lab, according to Staudenmaier's method [33] and the synthesis is described in detail, in ref [34].…”

Section: Methodsmentioning

confidence: 99%

Graphene Aerogel Growth on Functionalized Carbon Fibers

2020

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Graphene aerogel (GA) is a lightweight, porous, environmentally friendly, 3D structured material with interesting properties, such as electrical conductivity, a high surface area, and chemical stability, which make it a powerful tool in energy storage, sensing, catalyst support, or environmental applications. However, the poor mechanical stability that often characterizes graphene aerogels is a serious obstacle for their use in such applications. Therefore, we report here the successful mechanical reinforcement of GA with carbon fibers (CFs) by combining reduced graphene oxide (rGO) and CFs in a composite material. The surfaces of the CFs were first successfully desized and enriched with epoxy groups using epichloridrine. Epoxy-functionalized CFs (epoxy-CFs) were further covered by reduced graphene oxide (rGO) nanosheets, using triethylene tetramine (TETA) as a linker. The rGO-covered CFs were finally incorporated into the GA, affording a stiff monolithic aerogel composite. The as-prepared epoxy-CF-reinforced GA was characterized by spectroscopic and microscopic techniques and showed enhanced electrical conductivity and compressive strength. The improved electrical and mechanical properties of the GA-CFs composite could be used, among other things, as electrode material or strain sensor applications.

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Section: Methodsmentioning

confidence: 99%

Graphene Aerogel Growth on Functionalized Carbon Fibers

2020

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“…Professor Tour's group devoted a considerable amount of effort Fig. 1 a Reduction of GO by laser irradiation utilized a Nd-YAG laser (pulse width in the range of ms) with an excitation wavelength of 1064 nm [21]. b Schematic illustration of ultrathin laser-processed graphene-based micro-planar supercapacitors.…”

Section: Laser Synthesis Of Graphene From Polymermentioning

confidence: 99%

“…It turned out that high-quality graphene-like structures with efficient defect healing and ultralow sheet resistance were produced by the laser-induced reduction of GO (Fig. 1 a) [ 21 ], while the thermal reduction and chemical reduction methods cannot provide a high conductivity for the as-prepared rGO. This was because that the high temperature induced by laser (> 2500 °C) was able not only to remove oxygen-containing species but also in favor of eliminating the structural defects in the formed rGO, which would result in a high conductivity for the rGO by laser-assisted reduction method.…”

Section: Laser As the Synthetic Techniquementioning

confidence: 99%

Laser Synthesis and Microfabrication of Micro/Nanostructured Materials Toward Energy Conversion and Storage

et al. 2021

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Nanomaterials are known to exhibit a number of interesting physical and chemical properties for various applications, including energy conversion and storage, nanoscale electronics, sensors and actuators, photonics devices and even for biomedical purposes. In the past decade, laser as a synthetic technique and laser as a microfabrication technique facilitated nanomaterial preparation and nanostructure construction, including the laser processing-induced carbon and non-carbon nanomaterials, hierarchical structure construction, patterning, heteroatom doping, sputtering etching, and so on. The laser-induced nanomaterials and nanostructures have extended broad applications in electronic devices, such as light–thermal conversion, batteries, supercapacitors, sensor devices, actuators and electrocatalytic electrodes. Here, the recent developments in the laser synthesis of carbon-based and non-carbon-based nanomaterials are comprehensively summarized. An extensive overview on laser-enabled electronic devices for various applications is depicted. With the rapid progress made in the research on nanomaterial preparation through laser synthesis and laser microfabrication technologies, laser synthesis and microfabrication toward energy conversion and storage will undergo fast development.

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“…In order to produce large volumes of high‐quality rGO at low cost, a millisecond Nd‐YAG at 1064 nm was employed to achieve reduction of GO by Antonelou et al. [ 48 ] An exploration of various reduction methods of GO to rGO took place with some interesting results; high‐quality graphene‐like structures has been achieved with the laser based approach with resistivity lower than that of the chemical and thermal routes by almost two orders of magnitude. The authors suggested that by employing the particular irradiation conditions, are able to accomplish almost complete removal of oxygen‐containing species and exceptional healing of defects.…”

Section: Graphene‐based Materialsmentioning

confidence: 99%

Advanced Photonic Processes for Photovoltaic, Energy Storage, and Environmental Systems

Maragkaki

Savva

Stratakis

2021

Advanced Sustainable Systems

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On account of the increasing energy demand, there is a need for worldwide exploration for new materials and methods in developing other energy sources and storage technologies. With the development of portable electronics, integrated graphene‐based systems have attracted increasing attention due to their environmental friendliness, mechanical flexibility, and lightweight features. In this review, the latest advances in laser‐directed design and fabrication of integrated graphene‐based devices, along with state‐of‐the‐art applications in energy storage and solar cell technologies are comprehensively summarized. Recent advances in this field give promising and clean solutions offering an answer to the increasing concern of global warming and the growing energy demand in developed nations. The perspectives and challenges in designing and improving future graphene integrated devices are also discussed.

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Efficient defect healing and ultralow sheet resistance of laser-assisted reduced graphene oxide at ambient conditions

Cited by 28 publications

References 34 publications

Graphene Aerogel Growth on Functionalized Carbon Fibers

Graphene Aerogel Growth on Functionalized Carbon Fibers

Laser Synthesis and Microfabrication of Micro/Nanostructured Materials Toward Energy Conversion and Storage

Advanced Photonic Processes for Photovoltaic, Energy Storage, and Environmental Systems

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