us20020054995a1 - graphite platelet nanostructures -

Nanocomposite preparation via in situ polymerization of

Here we report a novel method of intercalation of a quaternary ammonium salt bearing a polymerizable group in between graphite galleries. By the exfoliation of the intercalate during its subsequent polymerization with n-butyl methacrylate, a polymer membrane with homogenously dispersed graphene nanostructures was obtained.

Graphite Nanoparticles / Nanopowder

Graphite (C) Nanopowder, nanodots or nanoparticles are black spherical high surface area graphitic carbon . Nanoscale Graphite Particles are typically 10 - 45 nanometers (nm) with specific surface area (SSA) in the 30 - 50 m 2 /g range and also available with an average particle size of 75 - 100 nm range with a specific surface area of approximately 2 - 10 m 2 /g.

Radar Absorbing Nanocomposites Based MultiLayered Graphene Platelets

JNS 5 (2015) 345-349 Radar Absorbing Nanocomposites Based MultiLayered Graphene Platelets/Epoxy F. Azizi*, H. Jahangiri Young researchers and elite club, Sanandaj branch, Islamic Azad University, Sanandaj, Iran. Abstract Graphene nanostructures were

Self

2011/7/151. Biosens Bioelectron. 2011 Jul 15;26(11):4491-6. doi: 10.1016/j.bios.2011.05.008. Epub 2011 May 11. Self-assembled graphene platelet-glucose oxidase nanostructures for glucose biosensing. Liu S(1), Tian J, Wang L, Luo Y, Lu W, Sun X. Author information: (1)State Key Lab of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of

Growth of Graphite Nanofibers from the Iron−Copper

As the reaction temperature was increased from 600 to 700 C, the structure of the graphite nanofibers underwent a dramatic change from a "platelet" to "tubular" configuration. It is suggested that this transformation is directly associated with the α-Fe to γ-Fe phase change over this temperature range.

Creating Pores on Graphene Platelets by Low‐Temperature KOH

utilized to intercalate between graphene platelets to prevent the restacking. [ 7 ] In addition, noncarbon nanostructures, such as MgO nanospheres, have also been used as spacers and/or templates in the assembly of graphene oxide (GO) platelets followed by

Large Area Patterning of Nanoparticles and

2021/4/8Nanoparticles possess exceptional optical, magnetic, electrical, and chemical properties. Several applications, ranging from surfaces for optical displays and electronic devices, to energy conversion, require large-area patterns of nanoparticles. Often, it is crucial to maintain a defined arrangement and spacing between nanoparticles to obtain a consistent and uniform surface response.

(PDF) Hydrogen storage in carbon nanostructures

Graphite is built up of two-dimensional hexagonal to a tube. A variety of types exists which is either made of sheets of carbon atoms where the carbon carbon distance one layer and therefore called single-walled nanotube in plain is 1.42 A and the distance between the sheets is (SWNT) or more than one layer called multi-walled 3.35 A. nanotube (MWNT) (for details see Ref. [5]).

A comparative study of the field emission properties of

Carbon nanofibers, with platelet arrangement of the graphitic planes parallel to the substrate, exhibit higher emission thresholds around 10 V/μ m. Diamond nanostructures, either modified through ammonia incorporation within the gas phase or not, exhibit the largest emission threshold around 25

One

A one-pot synthesis of graphene oxide (GO) sheets and GO quantum dots using graphite nanofibers (GNF) as starting material is reported. Two types of GNF starting materials, namely herringbone and platelet structures, were used. HRTEM revealed that platelet GNF produces quantum dots typically less than 10 nm in size while herringbone GNF produces relatively larger GO sheets. SAED patterns

PMSE 132

Graphite platelets were modeled as point-like inhomogeneous inclusions. A defect Green's function was employed to simulate the elastic and dielectric properties in a unified manner. The graphite platelets were considered as disk-like inhomogeneities with a diameter of 400 nm and thickness of 100 nm.

Surface Modification of Carbon Nanofibers and

Carbon nanofibers (CNFs), graphene platelets (GPs), and their mixtures were treated by plasma polymerization of propylene. The carbon nanoparticles (CNPs) were previously sonicated in order to deagglomerate and increase the surface area. Untreated and plasma treated CNPs were analyzed by dynamic light scattering (DLS), transmission electron microscopy (TEM), Fourier transform infrared

Radar Absorbing Nanocomposites Based MultiLayered

Graphene nanostructures were synthesized by Hummer method. 1, 3, 5 and 7 wt% of graphene nanostructures were suspended in certain amount of acetone on a mechanical stirrer and stirred then added to epoxy resin. After 4 hours, solution and Graphene

(PDF) Hydrogen storage in carbon nanostructures

Graphite is built up of two-dimensional hexagonal to a tube. A variety of types exists which is either made of sheets of carbon atoms where the carbon carbon distance one layer and therefore called single-walled nanotube in plain is 1.42 A and the distance between the sheets is (SWNT) or more than one layer called multi-walled 3.35 A. nanotube (MWNT) (for details see Ref. [5]).

(PDF) Graphite Nanoplatelets/Multiwalled Carbon

Graphite was treated Thu, 27 Dec with conc. nitric2012 21:16:47 acid and sulphuric acid in the volumetric ratio of 1:3 for 3 days Further, ruthenium oxide (RuO2 ) nanoparticles were dec- orated on this hybrid structure using chemical route followed by calcination.

Recent advances in experimental basic research on

2016/4/28Soon after the discovery of the two-dimensional gas of massless Dirac fermions in graphene by Novoselov, Geim et al [] and the subsequent experimental observation of the quantum Hall effect and Berry phase in graphene by Kim et al [] as well as the demonstration of chiral tunneling and the Klein paradox in graphene by Katsnelson, Novoselov and Geim [], the research activities on graphene have

Functionalized Graphite Platelets and Lead Sulfide

A photoactive electrode comprising lead sulfide (PbS) and cadmium sulfide (CdS) quantum dots (QDs) and functionalized graphite platelets (FGPs) was prepared by assembling them onto titanium dioxide (TiO2), which functioned as the wide band gap semiconducting scaffold. The QDs were cumulatively capable of harvesting portions of visible and infrared regions of solar spectrum, and FGP served as

A comparative study of the field emission properties of

Carbon nanofibers, with platelet arrangement of the graphitic planes parallel to the substrate, exhibit higher emission thresholds around 10 V/μ m. Diamond nanostructures, either modified through ammonia incorporation within the gas phase or not, exhibit the largest emission threshold around 25

Mechanical characterization of graphite/epoxy

2007/9/1The graphite platelets were approximated as ellipsoidal inclusions with average lateral size (a 1 = a 2) and thickness (a 3) obtained by scanning electronic microscopy. Three different batches of graphite platelet/epoxy composites were prepared, as-received graphite 100GNP/Epoxy, exfoliated graphite 100GNP/Epoxy, and expanded graphite 40GNP/Epoxy.

One

A one-pot synthesis of graphene oxide (GO) sheets and GO quantum dots using graphite nanofibers (GNF) as starting material is reported. Two types of GNF starting materials, namely herringbone and platelet structures, were used. HRTEM revealed that platelet GNF produces quantum dots typically less than 10 nm in size while herringbone GNF produces relatively larger GO sheets. SAED patterns

US20020054995A1

Separated graphite nanostructures are formed of thin graphite platelets having an aspect ratio of at least 1,500:1. The platelets have an angular geometric structure and may be fully independent from an original graphite particle, or partially attached to the particle.

Nanomaterials

Carbon source precursors for high-grade, clean, and low-carbon refractories were obtained by in situ exfoliation of flake graphite (FG) and phenolndash;formaldehyde resin (PF) composites with three-roll milling (TRM) for the fabrication of graphite nanoplatelets. In addition, by using Ni(NO3)2middot;6H2O as a catalyst in the pyrolysis process, multidimensional carbon nanostructures were

Synthesis, toxicity, biocompatibility, and biomedical

Graphene is a two-dimensional atomic crystal, and since its development it has been applied in many novel ways in both research and industry. Graphene possesses unique properties, and it has been used in many applications including sensors, batteries, fuel

(PDF) Graphite Nanoplatelets/Multiwalled Carbon

Graphite was treated Thu, 27 Dec with conc. nitric2012 21:16:47 acid and sulphuric acid in the volumetric ratio of 1:3 for 3 days Further, ruthenium oxide (RuO2 ) nanoparticles were dec- orated on this hybrid structure using chemical route followed by calcination.

Synergetic effects of graphene platelets and carbon

2011/3/1A remarkable synergetic effect between the multi-graphene platelets (MGPs) and multi-walled carbon nanotubes (MWCNTs) in improving the mechanical properties and thermal conductivity of epoxy composites is demonstrated. Stacking of individual two-dimensional

Growth of Graphite Nanofibers from the Iron−Copper

As the reaction temperature was increased from 600 to 700 C, the structure of the graphite nanofibers underwent a dramatic change from a "platelet" to "tubular" configuration. It is suggested that this transformation is directly associated with the α-Fe to γ-Fe phase change over this temperature range.

Synthesis of graphene platelets by chemical and

2013/10/1Another popular and cost effective method is by chemical modification of natural graphite . In general, graphite is oxidized using one of the established methods: Brodie's method using potassium chlorate and fuming nitric acid [10], Staudenmaier method using concentrated sulphuric or nitric acid and chlorate [11], or Hummer's method using potassium permanganate and sulphuric acid [12] to

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