Highly-efficient fabrication of nanoscrolls from functionalized graphene oxide by Langmuir–Blodgett method

Gao, Yan; Chen, Xiaoqiang; Xu, Hao; Zou, Yunlong; Gu, Renpeng; Xu, Mingsheng; Jen, Alex K.‐Y.; Chen, Hongzheng

doi:10.1016/j.carbon.2010.08.007

Cited by 91 publications

(79 citation statements)

References 40 publications

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“…Concurrent with unique electronic properties, the appropriate layer spacing of nanoscrolls might allow for energy storage applications 8,9 . Despite fascinating properties and a handful of theoretical studies of graphene nanoscrolls [10][11][12][13][14] , only few experimental studies [15][16][17][18] are reported for rGOx nanoscrolls. Viculis et al 17 showed that exfoliation of graphite by alkali metals followed by very strong sonication led to the formation of nanoscrolls, whereas Wang et al 18 showed that the aggregation of Ag particles on graphene sheets together with high-power sonication initiated the rolling of the rGOx nanoscrolls.…”

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confidence: 99%

“…Viculis et al 17 showed that exfoliation of graphite by alkali metals followed by very strong sonication led to the formation of nanoscrolls, whereas Wang et al 18 showed that the aggregation of Ag particles on graphene sheets together with high-power sonication initiated the rolling of the rGOx nanoscrolls. However, in none of these studies a thorough explanation is given on how and why the graphene sheets form rolled structures, and with few exceptions 15 the efficiency is low.…”

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confidence: 99%

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Formation of nitrogen-doped graphene nanoscrolls by adsorption of magnetic γ-Fe2O3 nanoparticles

et al. 2013

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Graphene nanoscrolls are Archimedean-type spirals formed by rolling single-layer graphene sheets. Their unique structure makes them conceptually interesting and understanding their formation gives important information on the manipulation and characteristics of various carbon nanostructures. Here we report a 100% efficient process to transform nitrogen-doped reduced graphene oxide sheets into homogeneous nanoscrolls by decoration with magnetic g-Fe 2 O 3 nanoparticles. Through a large number of control experiments, magnetic characterization of the decorated nanoparticles, and ab initio calculations, we conclude that the rolling is initiated by the strong adsorption of maghemite nanoparticles at nitrogen defects in the graphene lattice and their mutual magnetic interaction. The nanoscroll formation is fully reversible and upon removal of the maghemite nanoparticles, the nanoscrolls return to open sheets. Besides supplying information on the rolling mechanism of graphene nanoscrolls, our results also provide important information on the stabilization of iron oxide nanoparticles.

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Formation of nitrogen-doped graphene nanoscrolls by adsorption of magnetic γ-Fe2O3 nanoparticles

et al. 2013

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“…103 The assembly properties of GO were controlled further by tuning the pH and platelet aspect ratio (thus, varying the amphiphilicity of the structures). [105][106][107] Graphene composites exploiting p-p interactions Exploiting p-p interactions between graphene and other aromatic molecules during synthesis can effectively organize materials that are otherwise not processable. One such class of novel, innovative materials is seen in 2D porous covalent organic frameworks prepared by the condensation of aromatic hydroxyl-and boronic acid-rich structures (Figure 7a), and isolated as crystals of p-stacked sheets.…”

Section: Go At Interfacesmentioning

confidence: 99%

Nanoscale assembly into extended and continuous structures and hybrid materials

Emrick

Pentzer

2013

NPG Asia Mater

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Harnessing synthetic power to create novel materials with unique assembly properties is of fundamental interest for pushing the limits of molecular and macromolecular assembly, while further holding the potential for improving electronic and medical device performance. Controlling the assembly of aromatic molecules into nanostructures provides routes towards continuous and extended structures with performance that is improved markedly over that of their individual molecular components, opening possibilities for the formation of composites that have tailored interactions with other materials and thus improved applications. This review covers recent advances in the synthesis of conjugated materials, their controlled assembly into nanoscale architectures and implementation into devices. Specifically, we discuss the solution-based assembly of polythiophene into nanowire fibrils, the formation of columnar stacks of hexabenzocoronene liquid crystals and the preparation of functionalized solution processible graphene for nanocomposite formation.

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“…Inspired by this, we synthesized alkyl-functionalized graphene materials by the ring-opening amination of epoxy groups on the basal plane of GO with octadecylamine ( Figure 3) [74]. Octadecylamine-functionalized GO (ODA-GO) is hydrophobic and can be dispersed well in many organic solvents as single sheets.…”

Section: Covalent Surface Modification Of Go For Graphenebased Materialsmentioning

confidence: 99%

“…Chemical reduction of GO to rGO results in conductivity but also poor dispersibility because of - stacking interactions, which make individual rGO sheets almost inaccessible for modification or functionalization [74]. Currently, there are several methods used to prevent aggregation of rGO and graphene composites [87][88][89].…”

Section: Graphene-based Hybrid Nanomaterialsmentioning

confidence: 99%

Unique synthesis of graphene-based materials for clean energy and biological sensing applications

Gao²,

Yang³

et al. 2012

Chin. Sci. Bull.

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Graphene has unique physical properties, and a variety of proof-of-concept devices based on graphene have been demonstated. A prerequisite for the application of graphene is its production in a controlled manner because the number of graphene layers and the defects in these layers significantly influence transport properties. In this paper, we briefly review our recent work on the controlled synthesis of graphene and graphene-based composites, the development of methods to characterize graphene layers, and the use of graphene in clean energy applications and for rapid DNA sequencing. For example, we have used Auger electron spectroscopy to characterize the number and structure of graphene layers, produced single-layer graphene over a whole Ni film substrate, synthesized well-dispersed reduced graphene oxide that was uniformly grafted with unique gold nanodots, and fabricated graphene nanoscrolls. We have also explored applications of graphene in organic solar cells and direct, ultrafast DNA sequencing. Finally, we address the challenges that graphene still face in its synthesis and clean energy and biological sensing applications.

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Highly-efficient fabrication of nanoscrolls from functionalized graphene oxide by Langmuir–Blodgett method

Cited by 91 publications

References 40 publications

Formation of nitrogen-doped graphene nanoscrolls by adsorption of magnetic γ-Fe2O3 nanoparticles

Formation of nitrogen-doped graphene nanoscrolls by adsorption of magnetic γ-Fe2O3 nanoparticles

Nanoscale assembly into extended and continuous structures and hybrid materials

Unique synthesis of graphene-based materials for clean energy and biological sensing applications

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