Graphene Nanoribbons from Electrostatic-Force-Controlled Electric Unzipping of Single- and Multi-Walled Carbon Nanotubes

Zheng, Qi-Fang; Guo, Yuanyuan; Liang, Yue; Shen, Qing

doi:10.1021/acsanm.0c00710

Cited by 17 publications

(6 citation statements)

References 56 publications

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“…The first one was synthesized via oxidative cyclodehydrogenation with FeCl 3 . Orthodichlorobenzene [55], perfluorinated aromatic solvents [56], and even low-boiling solvents like chloroform and isopropanol [57,58] are employed to disperse G. G on SiO 2 /Si substrates exhibits electrostatic interaction between HOPG and the Si substrate [59]. HOPG has also been subjected to pulsed neodymium-doped yttrium aluminum garnet (Nd:YAG) laser exfoliation in order to create FG [60,61].…”

Section: Chemical Exfoliationmentioning

confidence: 99%

Recent Advances in the Synthesis of Graphene and Its Derivative Materials

Aafreen,

Verma,

Saeed

2024

Nanotechnology and Nanomaterials

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Graphene (G) is a 2D material of sp2 hybridized carbon atoms, discovered by Geim and Novoselov in 2004. The material presents a wide range of peculiar electronics and thermal, optical, mechanical, structural, and surface properties, which have attracted considerable interest from researchers and technologists. The conevntional techniques for graphenization have presented some drawbacks including low yield, costliness, high chances of contamination, and their time-consuming nature. These limitations have led to proliferation of research, which has led to the discovery of more advanced techniques for G synthesis over the years. At the moment, trending approaches to G production include chemical vapor disposition (CVD), epitaxial growth on silicon carbide (SiC), G oxide reduction, chemical synthesis, electrochemical synthesis, and laser-induced graphenization. There is a growing demand to produce G in large quantities and good quality. Nonetheless, because the conventional techniques have presented significant difficulties and imperfections in large-scale G production, various investigations have been conducted to identify new techniques for manufacturing cost-effective, large-scale, and high-quality G with novel applications such as energy storage, sensors, drug delivery, and biomedical devices. Each technique can be used for certain applications and has its own advantages. This chapter deals with the two approaches (top-down and bottom-up) for the synthesis of G and their procedure, limitations, and applications.

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Section: Chemical Exfoliationmentioning

confidence: 99%

Recent Advances in the Synthesis of Graphene and Its Derivative Materials

Aafreen,

Verma,

Saeed

2024

Nanotechnology and Nanomaterials

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“…One of the most recent techniques for producing graphene involves un-zipping of carbon nanotubes (CNT) to produce graphene nanoribbons (GNRs) in a controlled way with precise dimensions. The multiwall carbon nanotubes (MWCNTs) were unzipped by various experimental methods, such as using a mixture of acids, 118 a catalytic cutting method, 119 electric zipping, 120 and H-based unzipping, 121 etc. CNTs were utilized as the starting material for the catalytic cutting method.…”

Section: Recent Advances In Graphene Synthesis Techniquesmentioning

confidence: 99%

Graphene Properties, Synthesis and Applications: A Review

Urade

Lahiri

Suresh

2022

JOM

150

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We have evaluated some of the most recent breakthroughs in the synthesis and applications of graphene and graphene-based nanomaterials. This review includes three major categories. The first section consists of an overview of the structure and properties, including thermal, optical, and electrical transport. Recent developments in the synthesis techniques are elaborated in the second section. A number of top–down strategies for the synthesis of graphene, including exfoliation and chemical reduction of graphene oxide, are discussed. A few bottom–up synthesis methods for graphene are also covered, including thermal chemical vapor deposition, plasma-enhanced chemical vapor deposition, thermal decomposition of silicon, unzipping of carbon nanotubes, and others. The final section provides the recent innovations in graphene applications and the commercial availability of graphene-based devices.

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“…Carbon nanotubes (CNTs) are considered one of the carbon forms where the carbon atoms are arranged in a hexagonal honeycomb structure within a cylindrical tube shape that opens from both the upper and downside. , Single-walled carbon nanotubes (SWCNTs), double-walled carbon nanotubes (DWCNTs), and multiwalled carbon nanotubes (MWCNTs) are the three main categories of CNTs based on their wall count (MWCNTs) . Because of the unique characteristics of CNTs, including but not limited to hydrophobicity, high transparency, high conductivity, high electron mobility, flexibility, and other superlative features, they were organized as excellent candidates for employment in PSCs. , The main challenges for producing CNTs are energy consumption, high-temperature processing, expensive instruments, and low yield production rate % .…”

Section: Introductionmentioning

confidence: 99%

Multiwalled Carbon Nanotubes as Hole Collectors in Inverted Perovskite Solar Cells

Elseman,

Al-Gamal

2024

ACS Appl. Nano Mater.

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Carbon nanotubes (CNTs) are known for their unique photoelectric and mechanical properties, but their manufacturing process often requires high thermal energy. This study presents a simple solvothermal method to produce multiwalled carbon nanotubes (MWCNTs) from acetyl ferrocene at a low temperature of 250 °C. The synthesized MWCNTs were fully characterized and elucidated through X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy. The MWCNTs were then incorporated into poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PE-DOT:PSS) at different weight ratios (2.5, 5, and 10%) as a hole transporter in perovskite solar cells. The results of UV−vis spectroscopy showed that MWCNTs/ PEDOT:PSS did not affect the photon transmission to the perovskite layer. Photoluminescent analysis for PEDOT:PSS and optimal MWCNTs significantly reduced light emission by 93.3% for 5% MWCNTs in PEDOT:PSS. The device with the optimized 5% MWCNTs/PEDOT:PSS hole collector achieved an efficiency of 18.09%, compared to 16.51% for pristine PEDOT:PSS. This work demonstrates a promising approach for enhancing the efficiency of inverted planar perovskite-based devices through the use of MWCNTs prepared at low temperatures using a simple solution process.

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Graphene Nanoribbons from Electrostatic-Force-Controlled Electric Unzipping of Single- and Multi-Walled Carbon Nanotubes

Cited by 17 publications

References 56 publications

Recent Advances in the Synthesis of Graphene and Its Derivative Materials

Recent Advances in the Synthesis of Graphene and Its Derivative Materials

Graphene Properties, Synthesis and Applications: A Review

Multiwalled Carbon Nanotubes as Hole Collectors in Inverted Perovskite Solar Cells

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