Large magnetotransport properties in mixed-dimensional van der Waals heterostructures of graphene foam

Sagar, Rizwan Ur Rehman; Shabbir, Babar; Hasnain, S. M.; Mahmood, Nasir; Zeb, M. Husnain; Shivananju, Bannur Nanjunda; Ahmed, Taimur; Qasim, Irfan; Malik, Muhammad Imran; Khan, Qasim; Shehzad, Khurram; Younis, Adnan; Bao, Qiaoliang

doi:10.1016/j.carbon.2020.01.001

Cited by 15 publications

(6 citation statements)

References 46 publications

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“…Two-dimensional (2D) materials are becoming the first choice in upcoming electronic gadgets after the discovery of the first-ever 2D material named as graphene . Graphene is a unique 2D material with sp 2 -bonded carbon atoms, which is stable at room temperature, thermally and electrically conductive, stronger than steel, and stiffer than diamond; transmits 97.7% of visible light; has a high surface to volume ratio; and has derivatives with excellent versatile properties. − Graphene is already used in transparent conducting electrodes, solar cells, supercapacitors, fuel cells, batteries, photo catalyst, , chemical sensors, biosensors, photonics, and optoelectronics and purification of water . Similarly, numerous 2D materials, including black phosphorus, hexagonal boron nitride (hBN), molybdenum disulfide (MoS 2 ), tungsten disulfide (WS 2 ), molybdenum diselenide (MoSe 2 ), tungsten diselenide (WSe 2 ), and so on, have been discovered and studied in the past decade. − …”

Section: Introductionmentioning

confidence: 99%

Transfer-Free Growth of Bi₂O₂Se on Silicon Dioxide via Chemical Vapor Deposition

Sagar

Aslam

Nairan

et al. 2020

ACS Appl. Electron. Mater.

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The bismuth oxyselenide (Bi2O2Se) is considered as an alternative to graphene (zero band gap), black phosphorus, and molybdenum sulfide (MoS2) due to its sizeable band gap and high carrier mobility. To date, Bi2O2Se is fabricated on the top of mica using two to three sources under dual heating zones inside a chemical vapor deposition tube followed by its transfer on a desired substrate for particular device application. Herein, we have proposed an entirely new growth mechanism to synthesize Bi2O2Se directly on silicon dioxide (SiO2) using single source bismuth selenium (Bi2Se3) to get rid of the transfer process. The as-grown Bi2O2Se flakes were mechanically, structurally, and topographically investigated to ensure the quality of flakes. Young’s modulus ∼ 65 GPa of as-grown Bi2O2Se is thickness dependent, indicating the successful fabrication of Bi2O2Se on SiO2 as the Young’s modulus of Bi2Se3 ∼ 44–58 GPa is far lower than that of Bi2O2Se. The structure of as-synthesized Bi2O2Se provided evidence of successful fabrication of Bi2O2Se on SiO2. The field-effect-transitor device showed n-type semiconducting material with high current on/off ratio (∼108) and field-effect mobility of ∼70 cm2 V–1 s–1 which is comparable to those of traditional transition metal dichalcogenides. Technologically, the transfer-free growth of Bi2O2Se will generate high-quality hybrid material on SiO2, which can play a crucial role in highly efficient electronics.

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Section: Introductionmentioning

confidence: 99%

Transfer-Free Growth of Bi₂O₂Se on Silicon Dioxide via Chemical Vapor Deposition

Sagar

Aslam

Nairan

et al. 2020

ACS Appl. Electron. Mater.

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“…Thus, there are almost no pores in the structures under consideration. Here, the density of the graphene fiber can characterize the porosity: density is close to the diamond density (3.6 g/cm 3 ), but lower, since there is no full sp 3 hybridization and graphene flakes are densely packed but mostly connected by van der Waals bonds.…”

Section: Simulation Detailsmentioning

confidence: 98%

“…As it is well-known, carbon nanostructures provide extraordinary combined mechanical, electrical, thermal properties, especially when talking about carbon whiskers, which have unique strength and electrical conductivity [1]. Graphene, a well-known twodimensional material, gave a fresh concept for new three-dimensional (3D) structures with complex architecture fabricated on the basis of graphene [2][3][4]. Carbon structures with unique electrical, mechanical, and thermal properties are of great interest today [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Between some graphene flakes, new chemical bonds can appear; however, carbon atoms with sp 2 hybridization dominate. Carbon atoms with other hybridization states, such as sp 3 or sp, have small fractions [18]. However, the size and type of structural units can significantly affect the physical and mechanical properties of 3D nanostructures.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Structure Morphology on the Mechanical Properties of Crumpled Graphene Fiber

Baimova

Polyakova

Shcherbinin

2021

Fibers

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Crumpled graphene fiber is a promising structure to be a graphene precursor to enhance the production and mechanical properties of various carbon fibers. The primary goal of the present work is to study the crumpled graphene of different morphologies using molecular dynamics simulations to find the effect of the structural peculiarities on the mechanical properties, such as the tensile strength, elastic modulus, and deformation characteristics. Mono- and poly-disperse structures are considered under uniaxial tension along two different axes. As it is found, both structures are isotropic and stress–strain curves for tension along different directions are very similar. Young’s modulus of crumpled graphene is close, about 50 and 80 GPa; however, the strength of the polydisperse structure is bigger at the elastic regime. While a monodisperse structure can in-elastically deform until high tensile strength of 90 GPa, structure analysis showed that polydisperse crumpled graphene fiber pores appeared two times faster than the monodisperse ones.

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“…Sagar et al reported on CVD-grown a-Carbon with a negative MR magnitude of 2.7% and an angular MR of 9.5%. Due to the low band gap value of 0.6 eV, the un-doped non-crystalline a-Carbon is a very poor semiconductor, which makes it a weak contender for many optoelectronic applications [22,23]. The structure of a-Carbon has substantial consequences in its magnetotransport uses, since a-Carbon involves a short-range ordered structure rather than long-range ordered structures [24].…”

Section: Introductionmentioning

confidence: 99%

Substrate Impact on MR Characteristics of Carbon Nano Films Explored via AFM and Raman Analysis

et al. 2021

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Recent advances in the fabrication and classification of amorphous carbon (a-Carbon) thin films play an active part in the field of surface materials science. In this paper, a pulsed laser deposition (PLD) technique through controlling experimental parameters, including deposition time/temperature and laser energy/frequency, has been employed to examine the substrate effect of amorphous carbon thin film fabrication over SiO2 and glass substrates. In this paper, we have examined the structural and magnetoresistance (MR) properties of these thin films. The intensity ratio of the G-band and D-band (ID/IG) were 1.1 and 2.4, where the C(sp2) atomic ratio for the thin films samples that were prepared on glass and SiO2 substrates, were observed as 65% and 85%, respectively. The MR properties were examined under a magnetic field ranging from −9 T to 9 T within a 2-K to 40-K temperature range. A positive MR value of 15% was examined at a low temperature of 2 K for the thin films grown on SiO2 substrate at a growth temperature of 400 °C using a 300 mJ/pulse laser frequency. The structural changes may tune the magnetoresistance properties of these a-Carbon materials. These results were demonstrated to be highly promising for carbon-based spintronics and magnetic sensors.

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Large magnetotransport properties in mixed-dimensional van der Waals heterostructures of graphene foam

Cited by 15 publications

References 46 publications

Transfer-Free Growth of Bi₂O₂Se on Silicon Dioxide via Chemical Vapor Deposition

Transfer-Free Growth of Bi₂O₂Se on Silicon Dioxide via Chemical Vapor Deposition

Effect of the Structure Morphology on the Mechanical Properties of Crumpled Graphene Fiber

Substrate Impact on MR Characteristics of Carbon Nano Films Explored via AFM and Raman Analysis

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Large magnetotransport properties in mixed-dimensional van der Waals heterostructures of graphene foam

Cited by 15 publications

References 46 publications

Transfer-Free Growth of Bi2O2Se on Silicon Dioxide via Chemical Vapor Deposition

Transfer-Free Growth of Bi2O2Se on Silicon Dioxide via Chemical Vapor Deposition

Effect of the Structure Morphology on the Mechanical Properties of Crumpled Graphene Fiber

Substrate Impact on MR Characteristics of Carbon Nano Films Explored via AFM and Raman Analysis

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Product

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Transfer-Free Growth of Bi₂O₂Se on Silicon Dioxide via Chemical Vapor Deposition

Transfer-Free Growth of Bi₂O₂Se on Silicon Dioxide via Chemical Vapor Deposition