Graphene Oxide: Structural Analysis and Application as a Highly Transparent Support for Electron Microscopy

Wilson, Neil R.; Pandey, P. N.; Beanland, Richard; Young, Robert J.; Kinloch, Ian A.; Gong, Lei; Liu, Zheng; Suenaga, Kazu; Rourke, Jonathan P.; York, Stephen J.; Sloan, Jeremy

doi:10.1021/nn900694t

Cited by 658 publications

(497 citation statements)

References 47 publications

(85 reference statements)

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“…2a) similar to the method described in ref. 35. The precision of the lattice parameter measurement is at least 0.6% (that is, limited by the Au calibration), although individual reflections on ED patterns recorded from monolayer graphene and fluorographene samples can be measured with a precision of B0.15%.…”

Section: Methodsmentioning

confidence: 99%

Atomically resolved imaging of highly ordered alternating fluorinated graphene

et al. 2014

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One of the most desirable goals of graphene research is to produce ordered two-dimensional (2D) chemical derivatives of suitable quality for monolayer device fabrication. Here we reveal, by focal series exit wave reconstruction (EWR), that C 2 F chair is a stable graphene derivative and demonstrates pristine long-range order limited only by the size of a functionalized domain. Focal series of images of graphene and C 2 F chair formed by reaction with XeF 2 were obtained at 80 kV in an aberration-corrected transmission electron microscope. EWR images reveal that single carbon atoms and carbon-fluorine pairs in C 2 F chair alternate strictly over domain sizes of at least 150 nm 2 with electron diffraction indicating ordered domains Z0.16 mm 2 . Our results also indicate that, within an ordered domain, functionalization occurs on one side only as theory predicts. In addition, we show that electron diffraction provides a quick and easy method for distinguishing between graphene, C 2 F chair and fully fluorinated stoichiometric CF 2D phases.

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Section: Methodsmentioning

confidence: 99%

Atomically resolved imaging of highly ordered alternating fluorinated graphene

et al. 2014

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“…18 The C:O ratio of the prepared sample was estimated from X-ray photoelectron spectroscopy (XPS) (ESCA-3400, SHIMAZU) and found to be ca. 1.5:1, which is consistent with the previous reports.…”

Section: Sample Preparationmentioning

confidence: 99%

On the Formal Redox Potential of Oxygen Reduction Reaction at Iron Phthalocyanine/Graphene Composite Electrode in Alkaline Media

Ohtsuka

Kitamura

2015

Electrochemistry

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The redox reaction of iron phthalocyanine (FePc) combined with electrochemically-reduced graphene oxide (ER-GO) was investigated as a function of FePc fraction. A FePc/ER-GO/GC electrode was fabricated and the redox response of Fe 3+/2+ couple was analyzed by cyclic voltammetry. The formal potential was observed to change with the FePc fraction, and the most positive value was obtained at the full monolayer coverage. The onset potential of oxygen reduction reaction at the fabricated electrode shifted linearly with the formal potential of FePc. Such a coverage-dependent potential shift was explained in terms of the electronic interaction between FePc and substrate graphene surface based on the X-ray photoelectron spectroscopy as well as the theoretical DFT calculation of a model adsorption system.

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“…[9][10][11] Among the nanosized composites, graphene can work as a high-performance supporting material because of its two-dimensional structure; therefore, it has various applications in fields like photocatalysis, sensing, and optics. [5][6][7]9,[11][12][13][14][15][16][17] Nanosized metal particles can be dispersed homogeneously on the plane of graphene, and charge transfer at the interface of these hybrid materials can provide a synergistic effect inducing properties that are dissimilar from those of each individual component. 13,[18][19][20][21] Therefore, in this study, the photocatalytic activity of nanosized palladium-graphene composites was evaluated in the degradation of organic dyes methylene blue (MB), methyl orange (MO), rhodamine B (RhB), and brilliant green (BG) using a UV-vis spectrophotometer under ultraviolet light at 254 nm.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Nanosized Palladium-Graphene Composites and Photocatalytic Degradation of Various Organic Dyes

Kim¹,

Ko²

2016

Elastomers and Composites

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Nanosized palladium particles were synthesized using palladium(II) chloride, trisodium citrate dihydrate, and sodium borohydride under stirring condition. Nanosized palladium-graphene composites were prepared from palladium nanoparticles, and graphene was enclosed with polyallylamine under stirring condition for 1 h followed by ultrasonication for 3 h. Nanosized palladium-graphene composites were heated in an electric furnace at 700 °C for 2 h and characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. UV-vis spectrophotometry was used to evaluate the nanosized palladium-graphene composites as a catalyst in the photocatalytic degradation of various organic dyes such as methylene blue, methyl orange, rhodamine B, and brilliant green under ultraviolet light at 254 nm.

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Graphene Oxide: Structural Analysis and Application as a Highly Transparent Support for Electron Microscopy

Cited by 658 publications

References 47 publications

Atomically resolved imaging of highly ordered alternating fluorinated graphene

Atomically resolved imaging of highly ordered alternating fluorinated graphene

On the Formal Redox Potential of Oxygen Reduction Reaction at Iron Phthalocyanine/Graphene Composite Electrode in Alkaline Media

Preparation of Nanosized Palladium-Graphene Composites and Photocatalytic Degradation of Various Organic Dyes

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