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Carbon Nanotubes - Crossref

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Last Updated: 04 January 2023

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Histopathological Effects on Gills of Nile Tilapia ( Oreochromis niloticus , Linnaeus, 1758) Exposed to Pb and Carbon Nanotubes

Abstract: Long-Term research has been focusing on fish since heavy metals' effects have been present in fish. The aim of this research was to investigate histopathologic changes in Nile tilapia's gills to see if lead, carbon nanotubes, and Pb-carbon nanotubes could have harmful effects, as well as determining water quality in monitoring programs. For this, tilapia were exposed to Pb, carbon nanotubes, and Pb+carbon nanotubes for four days. We conclude that the oxidized multi-walled carbon nanotubes increased the acute lead toxicity in Nile tilapias.

Source link: https://doi.org/10.1017/s1431927616012009


Characterization of Functionalized Multiwalled Carbon Nanotubes for Use in an Enzymatic Sensor

Abstract Carbon nanotubes have been found to be a material with a great promise for the fabrication of biosensors. This paper describes microscopy and spectroscopy techniques to characterize raw and chemically modified multiwall carbon nanotubes prepared by chemical vapor deposition with the intention of using them as the active transducer in bioprocessing sensors. MWCNT's surface was simultaneously treated and functionalized by an acid mixture containing HNO 3 u2013H 2 SO 4 and amyloglucosidase applied to the chemically modified MWCNT surface.

Source link: https://doi.org/10.1017/s143192761401304x


High-Energy Resolution Electron Energy-Loss Spectroscopy Study of Interband Transitions Characteristic to Single-Walled Carbon Nanotubes

Abstract An electron energy-loss spectroscopic study using a monochromator transmission electron microscope was conducted to investigate the dielectric response of isolated single-walled carbon nanotubes exposed to interband transitions typical to chiral structures. SWCNT spectra obtained from isolated SWCNTs showed dramatic peaks below 0 matricon energy of 5 eV, which could be traced to SWCNTs' typical interband transitions. An origin of the shoulder structures was identified as a result of the surface dipole mode along the SWCNT's circumference direction, according to simulations of EELS spectra using the continuum dielectric theory.

Source link: https://doi.org/10.1017/s1431927614000580


EBSD Analysis of Tungsten-Filament Carburization During the Hot-Wire CVD of Multi-Walled Carbon Nanotubes

Abstract The deposition process is a significant issue for a stable deposition process, which is a component of a hot-wire chemical vapor deposition conditions of multi-walled carbon nanotubes. At filament temperatures above 1,400°C, the grain size of the recrystallizing W-core and W 2 C phase expands from the perimeter inwardly, and this phenomenon is exacerbated at filament temperatures above 1,400°C. The rise in the W 2 C and recrystallized W-core grain size from the perimeter inwardly is attributed to a thermal gradient within the filament, which in turn leads to the hardness measurements and crack formation.

Source link: https://doi.org/10.1017/s1431927613014001


The Origin of Long-Period Lattice Spacings Observed in Iron-Carbide Nanowires Encapsulated by Multiwall Carbon Nanotubes

Fe 3 C is unheardsomely long-period lattice spacings, u03b1-Fe, and u03b3-Fe are among the few occasions that have been traditionally banned for lattice spacings in these nanowires, causing confusion since experiments from lattice spacings of u22650. 4 nm were kinematically forbidden for Fe 3 C, more than 50,000 p. m. These forbidden reflections findings from dynamic scattering of the incident beam have been first recorded in bulk Fe 3 C crystals, according to Observation of these forbidden reflections. These reflections can result in major intensities for crystals containing glide planes like Fe3 C with space groups Pnma or Pbmn, with small amounts of beam tilt.

Source link: https://doi.org/10.1017/s1431927613001918


Effect of Electron Beam Irradiation and Heating on the Structural Stability of Sulphide-Filled Carbon Nanotubes

In recent years, there has been an increasing interest in characterisation techniques capable of measuring the response of nanostructured materials such as quantum dots and nanotubes to externally applied stimuli. In addition, recent advances in sample holder design and manufacturing have opened the door to unprecedented number of new in situ experiments. As a result, varied reports are increasingly populating the in situ TEM literature investigating such topics as temperature-dependent structural phase shifts of nanoparticles or dopant diffusion in nanoscaled batteries.

Source link: https://doi.org/10.1017/s1431927612013049


Microscopy Studies of Carbon Nanotubes/Ferroelectric Composites for Microelectronics

Top-down approaches for continuous scaling-down of semiconductor parts and components is getting more accessible and costly, and hence bottom-up plans, e. g. , the development of functional nano-structures using nanowires or nanotubes is being investigated rather than patterning and etching. The manufacture of one-dimension ferroelectric nanostructures has been investigated in recent years as a cap for future 3D memories, but many challenges remain to be overcome, particularly in terms of fabrication and characterization. The manufacture of ferroelectrics multi-walled carbon nanotubes composites was synthesised by chemical solution deposition technique, namely sol gel, in this work.

Source link: https://doi.org/10.1017/s1431927612013190


Fabrication of Selective Metal Contacts on Single-Walled Carbon Nanotubes for Device Applications

Atomic Force Microscopy combines electron beam and optical lithography to produce nanofabrication methods for single-walled carbon nanotubes based on a combination of electron beam and optical lithography. Using lithography patterns as examples, Atomic Force Microscopy in tapping mode was used to CVD sample characterization, CNT deposition, and localize and index the nanotubes on substrate, making it possible to selectively build metallic contacts on the CNTs.

Source link: https://doi.org/10.1017/s1431927605051007


Structure Determination of Atomically Controlled Crystal Architectures Grown within Single Wall Carbon Nanotubes

In allowing the reconstruction of the specimen's dynamic wavefunction at the specimen exit plane and simultaneously reducing the aberrations present in the objective lens, Indirect high resolution electron microscopy using one of several potential data-set geometries has advantages over conventional high resolution imaging in enabling the recovery of the specimen's peak wavefunction and eliminating the aberrations present in the objective lens.

Source link: https://doi.org/10.1017/s1431927605050385


Selected-Area Growth of Carbon Nanotubes by the Combination of Focused Ion Beam and Chemical Vapor Deposition Techniques

In this article, we discuss a method for growing carbon nanotubes in a more manageable manner, which allows us to synthesize nanotubes in a more scalable manner. CVD of hydrocarbon gases completed the development of carbon nanotubes on the intended substrates. This manufacturing process has the advantage of locating carbon nanotubes in specific locations. This could lead to the direct synthesis of carbon nanotubes onto virtually every substrate material, allowing the manufacture of carbon nanotube-based devices.

Source link: https://doi.org/10.1017/s1431927603030460

* 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