Dimension, strength and chemical and thermal stability of a single C-C bond in carbon nanotubes

Article Abstract:

For single-walled carbon nanotubes (SWCNTs), given the known product of the Young's modulus Y and the wall thickness t and the known temperature of tip-end melting (T(sub m) = 1593 K) as well as their functional dependence on atomic coordination and bonding energy, the dimension and strength of a C-C bond in a SWCNT are determined. The solution reveals that the C-C bond is ~0.142 nm thick and ~0.125 nm long with a 68% increase in binding energy, with respect to the bulk graphite values.

Energy metabolism, Bioenergetics, Graphite, Carbon compounds, Chemical properties

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Impact of bond order loss on surface and nanosolid mechanics

Article Abstract:

An analytical solution demonstrated that a competition between bond order loss and the associated bond strength gain of the lower coordinated atoms near edge of a surface dictates the mechanics of the surface and hence, a nanosolid. It concluded that the bond loss lowers the activation energy for atomic dislocation, whereas bond strength gain enhances the energy density or mechanical strength in the region near the surface.

Science & research, Research, Nanotechnology, Chemical bonds

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Determinants of thermal conductivity and diffusivity in nanostructural semiconductors

Article Abstract:

A unified nanothermodynamic model was developed to study the origin of the size effects in the thermal conductivity and diffusivity of nanostructural semiconductors. The results provide insight into the fundamental understanding of high-performance nanostructural semiconductors which could be used in optoelectronic and thermoelectric devices.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Silicon, Semiconductors, Thermal properties, Diffusion, Diffusion (Physics), Heat, Semiconductors (Materials), Heat conduction

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