Carbon nanotube

Nanosleeves: Morphology transitions of infilled carbon nanotubes

Submitted by Fan Xu on Wed, 03/24/2021 - 09:42

Morphology instability of substrate-supported carbon atomic layers can be harnessed to modulate physical properties and functions, which has drawn interesting attention. Curvature would be a critical factor affecting surface morphology and its stability characteristics. Infilled carbon nanotubes, that is to say carbon monolayers with curved geometry and infilled substrates, namely nanosleeves, widely exist in the literature and have many potential applications.

Real-space density functional theory adapted to cyclic and helical symmetry: Application to torsional deformation of carbon nanotubes

Submitted by Phanish Suryan… on Tue, 01/12/2021 - 23:43

Abstract

A variant of Irving-Kirkwood-Noll formulation for one-dimensional nanostructures

Submitted by Ajeet Kumar on Tue, 12/10/2019 - 17:51

We present a one-dimensional variant of the Irving-Kirkwood-Noll procedure to derive microscopic expressions of internal contact force and moment in one-dimensional nanostructures. We show that these expressions must contain both the potential and kinetic parts: just the potential part does not yield meaningful continuum results. We further specialize these expressions for helically repeating one-dimensional nanostructures for their extension, torsion and bending deformation. As the Irving-Kirkwood-Noll procedure does not yield expressions of stiffnesses, we resort to a thermodynamic equilibrium approach to first obtain the Helmholtz free energy of the supercell of helically repeating nanostructures. We then obtain expressions of axial force, twisting moment, bending moment and the associated stiffnesses by taking the first and second derivatives of the Helmholtz free energy with respect to conjugate strain measures. The derived expressions are used in finite temperature molecular dynamics simulation to study extension, torsion and bending of single-walled carbon nanotubes and their buckling.
The article will soon appear in the Mathematics and Mechanics of Solids. The same can be accessed at the following link: https://www.researchgate.net/publication/337873624_Microscopic_definiti…

Phonons in chiral nanorods and nanotubes: a Cosserat rod based continuum approach

Submitted by Ajeet Kumar on Fri, 05/24/2019 - 01:52

A Cosserat rod based continuum approach is presented to obtain phonon dispersion curves of flexural, torsional, longitudinal, shearing and radial breathing modes in chiral nanorods and nanotubes. Upon substituting the continuum wave form in the linearized dynamic equations of stretched and twisted Cosserat rods, we obtain analytical expression of a coefficient matrix (in terms of the rod's stiffnesses, induced axial force and twisting moment) whose eigenvalues and eigenvectors give us frequencies and mode shapes, respectively, for each of the above phonon modes.

Effects of oscillating pressure on desalination performance of transverse flow CNT membrane

Submitted by Jingjie Yeo on Thu, 04/05/2018 - 17:56

https://doi.org/10.1016/j.desal.2018.03.029 In parallel with recent developments in carbon nanomaterials, there is growing interest in using these nanomaterials for desalination. To date, many studies have affirmed the potential of using such nanomaterials for constant pressure desalination operation. In this work, the performance of such membrane when subjected to oscillatory pressure at sub-nanosecond is investigated in detail.

Ultra-stretchable and skin-mountable strain sensors using carbon nanotubes–Ecoflex nanocomposites

Submitted by mortezaamjadi on Tue, 08/25/2015 - 11:16

Super-stretchable, skin-mountable, and ultra-soft strain sensors are presented by using carbon nanotube percolation network–silicone rubber nanocomposite thin films. The applicability of the
strain sensors as epidermal electronic systems, in which mechanical compliance like human skin and high stretchability (e > 100%) are required, has been explored. The sensitivity of the strain

PostDoctoral Position on polymer composite material modeling - University Paris 13, Paris, France

Submitted by yann.charles on Mon, 03/16/2015 - 12:16

no longer available.

A 12 months post Doctoral position is avalaible on mechanical and numerical modeling fields at LSPM, univ. Paris 13, France.

3 PhD Positions: Carbon Nano-Structured Materials for Aerospace Applications

Submitted by upriyank on Tue, 04/08/2014 - 05:49

job

Carbon nanotube

Carbon Nano-Structured Materials for Aerospace Applications: From Characterization & Multi-scale Modelling to Product Realization- A Holistic Approach