Advanced searches left 3/3

Carbon Nanotubes - Zenodo

Summarized by Plex Scholar
Last Updated: 04 November 2022

* If you want to update the article please login/register

Carbon nanotubes and graphene in context

In context Junjie Chen, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P. R. , Junjie Chen Department of Energy and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan, P. R. , 454000, P. R. , Junjie Chen Department of Energy and graphene a Chen, Junjie Chen Department of Civil Engineering, Henan Mechan, Henan, Henan University, Henan University, Henan, Henan -C. Junjie Chen, ORCID: 0000-002-5022-6863, E-mail address: koncj@gmail. com Carbon nanotubes, also known as buckytubes, are nanoscale hollow tubes made of carbon atoms and are also called buckytubes. Carbon nanotubes are a member of the fullerene family. Although the first fullerene molecules were discovered in 1985 [1], Sumio Iijima's 1991 report of needlelike carbon tubes in Nature was the first public knowledge [2]. Sumio Iijima's carbon nanotubes were made from multi-walled carbon nanotubes synthesized by arc discharge techniques, according to Sumio Iijima. A single-walled carbon nanotube can be characterized as a long tube made by wrapping a single graphene sheet into a one-meter cylindrical cylinder with a diameter of about one nanometer, the ends of which are capped by fullerene cages [5]. Multi-walled carbon nanotube assemblies with different diameters are concentrically aligned single-walled carbon nanotube assemblies with varying diameters [5]. Carbon nanotubes manufactured by multiwalled carbon nanotubes differ from single-walled carbon nanotube tubes not only in their sizes, but also in their physical characteristics. Carbon vapors cool quickly during expansion, and carbon atoms quickly condense to build tubular structures with the help of catalyst particles. When pure graphite is vaporized, multi-walled carbon nanotubes can be synthesized, and single-walled carbon nanotubes are made from graphite-transition metal mixtures. Chemical vapor deposition is the most cost effective method to produce carbon nanotubes on a commercial scale. Applications of carbon nanotubes are designed to solve nanoscale problems. Carbon nanotubes have the potential to be used as nanoscale catalyst supports with high catalytic sensitivity and chemical sensors thanks to their broad surface area, as well as their unique ability to carry any chemical compounds after surface modification. Carbon nanotubes as additives have been used to produce plastic composites with enhanced electrical conductivity and mechanical strength as additives. Graphene is a two-dimensional representation of crystalline carbon, whether as a single layer of carbon atoms forming a honeycomb lattice or several layers [6]. Derivation of graphene isn't a difficult problem by itself; every time someone draws with a pencil on paper, the pencil trace contains a small fraction of single-layer and multilayer graphene. In particular, they found that electrons in graphene have a very high mobility, which means that graphene can also be used in electronic applications. Geim and Novoselov were awarded the Nobel Prize for Physics for their contributions in 2010 [6]. It turned out that single-layer graphene gave an optical comparison with the silicon dioxide that was thick enough to make the graphene visible under a standard optical microscope. Electros in graphene first interact with photons in the visible light frequencies, absorbing around 2. 3 percent of the light's intensity per atomic layer. One can either electron or hole conductivity in graphene that is similar to semiconductor conductivity by applying a gate voltage or using chemical doping by adsorbed atoms and molecules. However, in most semiconductors, electrons and holes do not have permitted quantum states, and, because electrons and holes don't have to occupy such high energies, certain gate voltages and types of chemical doping cannot occupy these states, the semiconductor acts as an insulator. Electron and hole states in graphene relevant for charge-carrier transportation are similar to those of ultra-relativistic quantum particles, i. e. quantum particles travelling at the speed of light. Each atom in sublattice A is flanked by three atoms of sublattice B and vice versa [6]. graphene is also of utmost importance to fundamental science for another reason: it is the first and simplest example of a two-dimensional crystal, that is, a solid material that contains just a single layer of atoms organized in a prescribed pattern [6]. Two-dimensional models are fundamentally different from three-dimensional models in many ways. Other two-dimensional crystals other than graphene can be obtained by exfoliation from other multilayer crystals or by chemical modification of graphene. Geim and Novoselov's work in 2004 [6]], Geim and Novoselov's work in 2004 [6]. In two dimensions, these techniques could result in the production of graphene samples that were macroscopically large in two dimensions but not atomically thin. Graphene provides a slew of new material systems [8], from unique physical appearances to mechanical stability. In particular, the unique physical and mechanical properties of graphene-reinforced polymer matrix composites offer scope for the manufacture of graphene-reinforced polymer matrix composite materials. Statement of competing interest The author declares that there is no conflict of interest. J. R. Heath, S. C. O'Brien, R. F. Helical microtubules of graphitic carbon are embedded in Helical microtubules. Pages 56-58 of Nature, Volume 354, Issue 6348, 1991. Nature, Volume 354, Issue 6348, 1991. One-nm diameter single-shell carbon nanotubes. Pages 603-605, Nature, Volume 363, Issue 6430, 1993, Issue 6430, 1993. Nature, Volume 363, Number 6433, 1993, Issue 6430. Nanotubes of 1-nm diameter in single-shell carbon nanotubes. In atomically thin carbon films, the electric field effect is similar to that of a field. Materials science progress and challenges in superconducttors. B, Volume 1, Issues 3-4, 1988, Pages 283-288. Materials Science and Engineering, B, Volume 1, Issues 3-4, 1988, Pages 283-288.

Source link: https://zenodo.org/record/7213566


Influence of graphene nanoplates and multiwall carbon nanotubes on rheology, structure, and properties relationship of poly (lactic acid)

At the ternary nanocomposites, and GNP and MWCNT to PLA, the integrant nanocomposites and MWCNT, leading to the decrease of the linear viscoelastic range and critical strain. We discovered that XRD can be used as a fast and unambiguous way to determine the homogeneity of the nanocomposites in terms of carbon filler dispersion in a polymer matrix as a measure of homogeneity of the nanocomposites. The successful reinforced effect of PLA composites on the polymer matrix of both fillers was reinforced by the MWCNT and GNP additions, which demonstrated the enduring reinforcement effect of PLA composites on the polymer matrix of both fillers.

Source link: https://zenodo.org/record/7097030


Optical Property Tuning of Single-Wall Carbon Nanotubes by Endohedral Encapsulation of a Wide Variety of Dielectric Molecules

Demonstrated by direct encapsulation of single-wall carbon nanotubes' optical properties of single-wall carbon nanotubes is properties with a tunable encapsulation of guest molecules with widely dissimilar static dielectric constants. Over 30 distinct compounds, ranging from 1. 8 to 109, are introduced in large diameter SWCNTs and more than ten compounds, demonstrating energy savings;a monotonic energy decrease  of the optical transitions with increased magnitude of the dielectric constant. Comparisons are shown with predictions from existence theory, and specific guest molecule/SWCNT chirality combinations that defy the general trend and theory have been established. Low dielectric constants have a significant rise in the fluorescence intensity and line narrowing, with long linear alkane packed SWCNTs exhibiting emission intensities that rival those of empty SWCNTs.

Source link: https://zenodo.org/record/7034275


Diameter-dependent single- and double-file stacking of squaraine dye molecules inside chirality-sorted single-wall carbon nanotubes

Through the mutual association of limited dyes and host SWCNTs, the filling of single-wall carbon nanotubes with dye molecules has become a novel way to add new functionality. The encapsulated dye molecules produce highly cohesive molecular arrays in particular cases, and these result in a severely altered optical properties of dye molecules. The dye molecules' absorption wavelength  of the dye can be traced to a unique SWCNT diameter dependence, which can be traced to the specific stacking of the dye inside the host SWCNTs, based on the specific stacking of the dye molecules.

Source link: https://zenodo.org/record/7031172


The role of the bile salt surfactant sodium deoxycholate in aqueous two-phase separation of single-wall carbon nanotubes revealed by systematic parameter variations

We present a systematic analysis of the choice and concentration of specific surfactants on the ATP sorting process by undertaking a series of single-step ATP separations in which each time regular and individual parameters are individually varied, as well as monitoring every SWCNT chirality between both phases with sophisticated wavelength-dependent spectroscopy. The separation order in a regularly changing pattern as a result of SWCNT diameter is determined by these systematic molecules fitting around the SWCNT circumference's circumference.

Source link: https://zenodo.org/record/7031127


Synthesis and characterization of MgB2 superconductors with carbon nanotubes (CNTs) and tin (Sn) addition

Due to its excellent mechanical properties and carbon nanotube's low density, MgB2/CNT is a promising candidate for superconducting wire application. However, strong interfacial link between the CNT reinforcement and the MgB2 matrix is difficult to handle. This paper, therefore, explores magnesium diboride superconductors' synthesis and characterization with carbon nanotubes and tin addition. Each sample was obtained by weighing the raw material first, then hand grinding with agate mortars for 3 hours. Sample A1's grain boundaries were more precise than B2's, according to a SEM morphological report. The potential effects of MgB2 on critical current density and magnetic density in several industrial applications, such as Magnetic Resonance Imaging, magnetic levitation, and transformers, need to be investigated for future studies.

Source link: https://zenodo.org/record/6983751


Selective Ion Capturing via Carbon Nanotubes Charging

A charge disbalance and propagation of this effect into a thin-layer membrane domain under mildly polarization conditions can occur. A selective ion capture from the solution is expected, owing to the charge generation on the CNTs lattice and the exceptional selectivity and rapid establishment of new concentration profiles provided by the thin-layer membrane. Through either a potentiometric potassium-selective sensor or an optode confronted to the actuator device, a 10-fold decrease from the initial potassium content in the thin-layer solution was detected. One potential use of this strategy is the removal of ionic interferences in a sample by means of an actuator, which can help improve the accuracy of analytical tests of a charged or neutral target in the sample.

Source link: https://zenodo.org/record/6786165


Electromagnetic and optical responses of a composite material comprising individual single-walled carbon-nanotubes with a polymer coating

It is also a convenient model system to demonstrate experimentally the fundamental problems relating to carbon nanotube electromagnetics, such as the effects of inter-tube electron tunneling on the localized plasmon resonance in the terahertz range or the infrared absorption enhancements of polymer molecules attached to the nanotube surface, as shown by the above. Application of p-CNT based composites as dielectric media in the terahertz regime differs from the fundamentals to applied carbon nanotube electromagnetics.

Source link: https://zenodo.org/record/6647322


Carbon nanotubes for cardiac tissue regeneration: State of the art and perspectives

Although the nanomaterial grows on top of the nanomaterial, integration of CNTs with polymeric scaffolds is a promising heart regeneration tactic, as shown in these pages, their behavior has a boosting effect on cardiomyocytes' behavior, as well as their synchronous contractility when grown on top of the nanomaterial. Pure CNTs have attracted attention lately for their ability to produce innovative CNTs without using additional fillers, as shown by the conductive characteristics of pure CNTs. Overall, engineered CNT builds are demonstrating their ability to create new platforms that can interface, repair, or improve cardiac tissue's results.

Source link: https://zenodo.org/record/6137493

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions