scholarly journals A New Resistance Formulation for Carbon Nanotubes

2008 ◽  
Vol 2008 ◽  
pp. 1-3 ◽  
Author(s):  
Ji-Huan He
Keyword(s):  
Carbon Nanotubes ◽  
Theoretical Prediction ◽  
Experimental Observation ◽  
Conductive Polymers ◽  
Molecular Wires ◽  
Nerve Fibers ◽  
Fractal Approach ◽  
New Formulation

A new resistance formulation for carbon nanotubes is suggested using fractal approach. The new formulation is also valid for other nonmetal conductors including nerve fibers, conductive polymers, and molecular wires. Our theoretical prediction agrees well with experimental observation.

scholarly journals Theoretical prediction by DFT and experimental observation of heterocation-doping effects on hydrogen adsorption and migration over the CeO2(111) surface

2021 ◽  
Author(s):  
Kota Murakami ◽  
Yuta Mizutani ◽  
Hiroshi Sampei ◽  
Atsushi Ishikawa ◽  
Yuta Tanaka ◽  
...  
Keyword(s):  
Theoretical Prediction ◽  
Experimental Observation ◽  
Ionic Radius ◽  
Hydrogen Adsorption ◽  
Strong Binding ◽  
Doping Effects ◽  
Small Ionic Radius ◽  
And Migration

The addition of dopants with a small ionic radius led to strong binding of H atoms, and the balance of H+ reactivity (mobility) and H+ coverage was fundamentally important for high H+ conductivity and catalysis involving surface protonics.

scholarly journals FRACTAL APPROACH TO MECHANICAL AND ELECTRICAL PROPERTIES OF GRAPHENE/SIC COMPOSITES

2021 ◽  
Vol 19 (2) ◽  
pp. 271
Author(s):  
Yu-Ting Zuo ◽  
Hong-Jun Liu
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Properties ◽  
Fractal Theory ◽  
Bright Light ◽  
Fractal Dimensions ◽  
Mechanical Analysis ◽  
New Era ◽  
Fractal Approach ◽  
Mechanical And Electrical Properties ◽  
Sic Composites

Graphene and carbon nanotubes have a Steiner minimum tree structure, which endows them with extremely good mechanical and electronic properties. A modified Hall-Petch effect is proposed to reveal the enhanced mechanical strength of the SiC/graphene composites, and a fractal approach to its mechanical analysis is given.  Fractal laws for the electrical conductivity of graphene, carbon nanotubes and graphene/SiC composites are suggested using the two-scale fractal theory. The Steiner structure is considered as a cascade of a fractal pattern. The theoretical results show that the two-scale fractal dimensions and the graphene concentration play an important role in enhancing the mechanical and electrical properties of graphene/SiC composites. This paper sheds a bright light on a new era of the graphene-based materials.

Unsymmetrical Buckling of Thin Shallow Spherical Shells

1964 ◽  
Vol 31 (3) ◽  
pp. 447-457 ◽  
Author(s):  
Nai-Chien Huang
Keyword(s):  
Eigenvalue Problem ◽  
Theoretical Prediction ◽  
Experimental Observation ◽  
Large Range ◽  
Geometrical Parameters ◽  
Spherical Shells

The axisymmetrical snapping of clamped shallow spherical shells has been studied by many authors. There is found to be a discrepancy between the experimental observation of the buckling pressure and their theoretical prediction. In this paper, a study is made of the buckling pressure based on the initiation of unsymmetrical deflection. An eigenvalue problem is formulated and the buckling pressures for shells of a large range of geometrical parameters are obtained numerically. The present work reduces the gap between experiment and theory.

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