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نتایج جستجو برای Multi-walled carbon nanotubes

تعداد نتایج: 403974  
2007
R. C. Batra, A. Sears,

Molecular mechanics (MM) simulations have been carried out to determine energetically favorable double-walled carbon nanotube (DWNT) structures, and analyze their infinitesimal extensional, torsional, radial expansion/contraction, and bending deformations. Loads are applied either to one wall or simultaneously to both walls of an open-ended DWNT. These results are compared against single-walled...

2009
Vladimir Zavalniuk, Sergey Marchenko,

A simplified theory of the telescopic oscillations in multiwalled carbon nanotube is developed. The explicit expressions for the telescopic force constants (longitudinal rigidity) and frequencies for telescopic oscillations are derived depending on interacting tubes diameters and lengths. The contribution of small-amplitude telescopic oscillations to low temperature characteristics of nanotubes...

2007
Chuanyong Qu, Xiaoqiao He, Qing-Hua Qin,

carbon nanotube is investigated based on an elastic multi-layer shell model with van der Waals interaction taken into consideration. The multi-walled carbon nanotube is described as an individual elastic shell and the interlayer friction is negligible between the inner and outer tubes in the proposed model. And the Donnell equations of cylindrical shells are employed to describe the nonlinear b...

Journal: :Physical chemistry chemical physics : PCCP 2013
Anindya Majumder, Maryam Khazaee, Jörg Opitz, Eckhard Beyer, Larysa Baraban, Gianaurelio Cuniberti,

Here we present a hybrid approach to functionalize multi-walled carbon nanotubes in aqueous solution, exploring a non-covalent binding strategy. We focus on formation of hybrid complexes consisting of carbon nanotubes decorated by single stranded DNA, non-covalently attached using surfactants as intermediate layers. Unlike single walled carbon nanotubes, revealing easy side wall wrapping of DNA...

Background: Natural organic matters (NOMs) have the main role in formation of trihalomethanes. These compounds are in natural water sources due to biological activities. In the presented study, adsorption and separation of humic acid as an index of natural organic matters using multi-walled carbon nanotubes is evaluated. Methods: The experiments were carried out in bath adsorption reactors wit...

2013
Sebastien Nanot, Nicholas A. Thompson, Ji-Hee Kim, Xuan Wang, William D. Rice, Erik H. Hároz, Yogeeswaran Ganesan, Cary L. Pint, Junichiro Kono,

Single-walled carbon nanotubes (SWCNTs) are hollow, long cylinders with extremely large aspect ratios, made of one atomic sheet of carbon atoms in a honeycomb lattice. They possess extraordinary thermal, mechanical, and electrical properties and are considered as one of the most promising nanomaterials for applications and basic research. This chapter describes the structural, electronic, vibra...

Journal: :international journal of environmental research 0
a. p. toropova, istituto di ricerche farmacologiche m..., istituto di ricerche farmacologiche m..., departament d'enginyeria informa..., interdisciplinary nanotoxicity center..., interdisciplinary nanotoxicity center...,

the study was carried out to develop an efficient approach for prediction the genotoxicity of carbon nanotubes. the experimental data on the bacterial reverse mutation test (ta100) on multi-walled carbon nanotubes (mwcnts) was collected from the literature and examined as an endpoint. by means of the optimal descriptors calculated with the monte carlo method a mathematical model of the endpoint...

2012
Tursun Abdiryim, Aminam Ubul, Ruxangul Jamal, Adalet Rahman,

The polyaniline/single-walled carbon nanotubes (PANI/SWNTs) composites with a content of SWNTs varying from 8 wt% to 32 wt% were synthesized using a solid-state synthesis method. The structure and morphology of the samples were characterized by fourier transform infrared (FTIR) spectra, ultraviolet-visible (UV-vis) absorption spectra, X-ray diffraction (XRD) and transmission electron microscopy...

2013
Anindya Majumder, Maryam Khazaee, Joerg Opitz, Eckhard Beyer, Larysa Baraban, Gianaurelio Cuniberti,

1. Comparative study of carbon nanotube dispersion using surfactants Aqueous carbon nanotube dispersions were obtained by sonication tip using two cationic (DTAB and CTAB) and three anionic surfactants (SDDBS, SDS and SC). UV-Vis spectroscopy is a versatile method for characterizing the dispersion quality of CNTs in a solution. Bundles of MWCNTs are not active in the wavelength region between 2...

2010
G Venkata Ramana, Balaji Padya, R Naresh Kumar,

Carbon nanotubes (CNTs ) are considered to be one of the novel reinforcement for developing advanced nanocomposites due to their outstanding thermo-mechanical properties. Multi-walled carbon nanotubes (MWCNTs ) are developed by arc discharge method. To enhance the dispersion of CNTs in polymer matrix, CNTs are modified with chemical treatment and processed by ultrasonication process. Surface ch...