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IARC Monograph Evaluates Carbon Nanotubes, Silicon …

IARC Monograph Evaluates Carbon Nanotubes, Silicon Carbide. Volume 111 of the IARC Monographs series, now available from the International Agency for Research on Cancer, evaluates the carcinogenic potential of carbon nanotubes and silicon carbide. Carbon nanotubes exist in one of two forms: as a single graphene cylinder with an outer diameter of

Effect of surface treatment on photoluminescence of …

The authors formed the carbon-silicon carbide coaxial nanotubes by heating silicon powder with multi-walled carbon nanotubes. Next, the nanotubes were subjected to heat treatment in air whereby samples 1 and 4 were subjected to 700 ° C for 2 hours, samples 2 and 5 to 800 ° C for 4 hours, and samples 3 and 6 to 900 ° C for 4 hours.

Phys. Rev. B 73, 245415 (2006) - Ab initio study of …

Silicon carbide nanotubes have a great potential for appliion in chemical sensors in harsh environment or in biological sensors. It is of interest to explore the electronic properties of these nanotubes, and how those are modified in the presence of impurities. It is well known that nitrogen and boron atoms are common contaminations in bulk

Carbon nanotube - Wikipedia

These nanotubes were grown on silicon substrates using an improved chemical vapor deposition (CVD) method and represent electrically uniform arrays of single-walled carbon nanotubes. The shortest carbon nanotube can be considered to be the organic.

Boron Nitride Nanotubes, Silicon Carbide Nanotubes, and …

1/1/2014· Boron nitride nanotubes (BNNTs) and silicon carbide nanotubes (SiCNTs) are of interest to NASA due to their superior thermo-oxidative stability relative to CNTs, which suggests potential use in hostile environments.

A computational study of platinum adsorption on defective and non-defective silicon carbide nanotubes

extreme hardness [1–6]. Lately, silicon carbide nanotubes (SiCNTs) have been successfully synthesized with a silicon (Si) to carbon (C) ratio of 1:1 via the reaction of Si with multi-walled carbon nanotubes (CNTs) [7]. Unlike CNTs, SiCNTs regardless of chirality

:: Journal of the Korean Ceramic Society

We synthesized silicon carbide (β-SiC) nanowires with nano-scale diameter (30 - 400 nm) and micro-scale length (50 - 200 μm) on a porous body using low-grade silica and carbon black powder by carbothermal reduction at 1300 - 1600 C. The SiC nanowires were

Effect of added silicon carbide nanowires and carbon nanotubes on mechanical properties …

In this work, the mechanical properties of 0–3 nanocomposite materials containing silicon carbide nanowires (SiCNWs), carbon nanotubes (CNTs), and natural rubber were studied. The SiCNWs and CNTs were used as reinforcement fiber whereas natural rubber

Phys. Rev. B 71, 085312 (2005) - Strain energy and …

We perform density functional calculations for the geometrics, strain energy, and electronic structures of silicon carbide nanotubes (SiCNT ’s). We find that the strain energy in SiCNT ’s is as higher as 0.686 eV ∕ atom relative to 3 C − SiC for (5,5) SiCNT and decreases with increasing tube diameter.

Molecular dynamics simulation of single-walled silicon …

Molecular dynamics simulation of single-walled silicon carbide nanotubes immersed in water. The structure and dynamics of water confined in single-walled silicon carbon nanotubes (SWSiCNTs) are investigated using molecular dynamics (MD) simulations. The density of water inside SWSiCNTs is reported, and an equation is suggested to predict the

Effect of surface treatment on photoluminescence of …

The authors formed the carbon-silicon carbide coaxial nanotubes by heating silicon powder with multi-walled carbon nanotubes. Next, the nanotubes were subjected to heat treatment in air whereby samples 1 and 4 were subjected to 700 ° C for 2 hours, samples 2 and 5 to 800 ° C for 4 hours, and samples 3 and 6 to 900 ° C for 4 hours.

First-principle studies of the optical properties of silicon carbide nanotubes …

It is reasonable to predict that the novel properties of bulk SiC due to quantum size e ects would also reflect in silicon carbide nanostrctures. The band structure and optical dielectric function of single-walled zigzag, armchair, and chiral silicon carbide nanotubes (SiC-NTs) as well as the singleoneyco SiC sheet have been calculated within density-functional theory in the local-densitypproximation.

Effect of added silicon carbide nanowires and carbon nanotubes on mechanical properties …

In this work, the mechanical properties of 0–3 nanocomposite materials containing silicon carbide nanowires (SiCNWs), carbon nanotubes (CNTs), and natural rubber were studied. The SiCNWs and CNTs were used as reinforcement fiber whereas natural rubber

Carcinogenicity of fluoro-edenite, silicon carbide fibres and whiskers, and carbon nanotubes

fluoro-edenite, silicon carbide (SiC) fibres and whiskers, and carbon nanotubes (CNTs) including single-walled (SWCNTs) and multi-walled (MWCNTs) types. These assessments will be published as Volume 111 of the IARC Monographs.1 Fluoro-edenite was first

Microwave Irradiation Assisted Synthesis of Silicon …

Meanwhile, scanning electron microscopy revealed that tubular structure of carbon nanotube was retained after microwave irradiation and energy dispersive x-ray spectroscopy shown the silicon carbide nanotube consist of only elemental C and Si and thus

A DFT study on the N2O reduction by CO molecule over …

Abstract. In this work, we study the nitrous oxide (N 2 O) reduction by CO over zigzag (6,0) silicon carbide nanotubes (SiCNT) and nanosheets (SiCNS) by means of density functional theory calculations. Different N 2 O and CO adsorption configurations are examined over these surfaces. The results indie that the adsorption of N 2 O via a [3 +

Silicon carbide nanotubes and nanotubular fibers: …

Published data on silicon carbide nanotubes (SiC-NT) are analyzed. According to theoretical calculations, single-layer SiC-NTs do not dissociate, but they have not yet been detected experimentally. According to the experimental data, metastable SiC-NTs with walls consisting of several layers and nanotube fibers were produced.

PROCESSING, MICROSTRUCTURE, AND PROPERTIES OF CARBON NANOTUBE AND SILICON CARBIDE …

In order to investigate the use of multi-wall carbon nanotubes (MWCNTs) as fibrous reinforcement for silicon carbide (SiC), various sample discs were fabried via spark plasma sintering (SPS). Seven sample discs were made at the Army Research Lab (ARL

Preparation of silicon carbide nanotubes by hydrothermal …

5/6/2006· The SiC nanotubes were characterized by x-ray diffraction, energy dispersive x-ray spectrum, selected area electron diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, and Raman and infrared spectra. The results show that the samples are SiC nanotubes composed with crystalline β - Si C structure and some

Carcinogenicity of fluoro-edenite, silicon carbide fibres and whiskers, and carbon nanotubes

fluoro-edenite, silicon carbide (SiC) fibres and whiskers, and carbon nanotubes (CNTs) including single-walled (SWCNTs) and multi-walled (MWCNTs) types. These assessments will be published as Volume 111 of the IARC Monographs.1 Fluoro-edenite was first

Preparation of silicon carbide nanotubes by …

The SiC nanotubes with small inner pores have an outer diameter of less than 10 nm and length of micrometers. The structures of SiC nanotubes are hollow inner pores, multiwall crystalline SiC layers, and thin amorphous silicon oxide outer layers. The

Synthesis of novel hybrid carbon nanomaterials inside …

For the first time, Tomitsugu Taguchi and his colleagues successfully synthesized a novel hybrid carbon nanomaterial inside silicon carbide by ion irradiation of the C-SiC coaxial nanotube. Through ion irradiation of the C-SiC coaxial nanotube, novel microstructural change that are considered promising processes for the synthesis of novel carbon nanomaterials were developed.

Carbon nanotube - Wikipedia

These nanotubes were grown on silicon substrates using an improved chemical vapor deposition (CVD) method and represent electrically uniform arrays of single-walled carbon nanotubes. The shortest carbon nanotube can be considered to be the organic.

Silicon carbide nanotubes growth: an original approach

Because of their unique properties, silicon carbide nanotubes (SiC-NTs) have aroused particular research interest. In this letter, a new approach to fabrie SiC-NTs via the

Delivery of Cisplatin Anti-Cancer Drug from Carbon, …

3/7/2017· For the effect of nanotube composition, the results indied that silicon carbide nanotube has the least efficiency for drug release, due to its strong drug-nanotube. Also, the most important acting forces on drug delivery are van der Waals interactions.

Formation of silicon carbide nanotubes and nanowires …

A new type of multiwalled silicon carbide nanotube (SiCNT), with 3.5-4.5 Å interlayer spacings, was observed in addition to the previously known β-SiC (cubic zinc blende structure) nanowires and the biaxial SiC-SiO x nanowires.

Synthesis of Silicon Carbide Nanotubes - Taguchi - 2005 - …

Single‐phase silicon carbide (SiC) nanotubes were successfully synthesized by the reaction of carbon nanotubes with silicon powder at 1200 C for 100 h. X‐ray diffraction patterns indied that most of the carbon from the carbon nanotubes that were reacted with silicon at …

Silicon Carbide Nanotubes As Potential Gas Sensors for …

Silicon Carbide Nanotubes Serving as a Highly Sensitive Gas Chemical Sensor for Formaldehyde. The Journal of Physical Chemistry C 2011, 115 (21) , 10388-10393. DOI: 10.1021/jp2005937. R. …