scholarly journals Optical Properties of Ultrashort Semiconducting Single-Walled Carbon Nanotube Capsules Down to Sub-10 nm

2008 ◽  
Vol 130 (20) ◽  
pp. 6551-6555 ◽  
Author(s):  
Xiaoming Sun ◽  
Sasa Zaric ◽  
Dan Daranciang ◽  
Kevin Welsher ◽  
Yuerui Lu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Carbon Nanotube ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon

Length-dependent optical properties of single-walled carbon nanotube samples

2013 ◽  
Vol 422 ◽  
pp. 255-263 ◽  
Author(s):  
Anton V. Naumov ◽  
Dmitri A. Tsyboulski ◽  
Sergei M. Bachilo ◽  
R. Bruce Weisman
Keyword(s):  
Optical Properties ◽  
Carbon Nanotube ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon

First Principles and Finite Element Predictions of Radiative Properties of Nanostructure Arrays: Single-Walled Carbon Nanotube Arrays

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Aaron Sisto ◽  
Xiulin Ruan ◽  
Timothy S. Fisher
Keyword(s):  
Finite Element ◽  
Optical Properties ◽  
Carbon Nanotube ◽  
First Principles ◽  
Density Functional ◽  
Radiative Properties ◽  
Classical Electrodynamics ◽  
Gw Approximation ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon

Recent advances in nanofabrication technology have facilitated the development of arrays of nanostructures in the classical or quantum confinement regime, e.g., single-walled carbon nanotube (SWCNT) arrays with long-range order across macroscopic dimensions. So far, an accurate generalized method of modeling radiative properties of these systems has yet to be realized. In this work, a multiscale computational approach combining first-principles methods based on density functional theory (DFT) and classical electrodynamics simulations based on the finite element method (FEM) is described and applied to the calculations of optical properties of macroscopic SWCNT arrays. The first-principles approach includes the use of the GW approximation and Bethe–Salpeter methods to account for excited electron states, and the accuracy of these approximations is assessed through evaluation of the absorption spectra of individual SWCNTs. The fundamental mechanisms for the unique characteristics of extremely low reflectance and high absorptance in the near-IR are delineated. Furthermore, opportunities to tune the optical properties of the macroscopic array are explored.

scholarly journals Vibrational and Optical Properties of Single-Walled Carbon Nanotube-Semiconducting Polymers Composites (abstract)

2009 ◽  
Author(s):  
M. Baïtoul ◽  
M. Zekriti ◽  
Beverly Karplus Hartline ◽  
Renee K. Horton ◽  
Catherine M. Kaicher
Keyword(s):  
Optical Properties ◽  
Carbon Nanotube ◽  
Semiconducting Polymers ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon

scholarly journals First-Principles Study on Electronic and Optical Properties of Single-Walled Carbon Nanotube Under an External Electric Field

2021 ◽  
Author(s):  
Abdelhafid NAJIM ◽  
Omar BAJJOU ◽  
Khalid RAHMANI ◽  
Mohammed khenfouch
Keyword(s):  
Optical Properties ◽  
Carbon Nanotube ◽  
Electric Field ◽  
Absorption Coefficient ◽  
Band Gap ◽  
External Electric Field ◽  
Density Of States ◽  
Single Walled Carbon Nanotube ◽  
Electronic And Optical Properties ◽  
Single Walled Carbon

Abstract In this study, the electronic and optical properties of one-dimensional (1D) Single-Walled Carbon Nanotube (SWCNT) nanostructures, under an external electric field (𝐸𝑒𝑥𝑡 ) effects applied in z direction, are investigated using density functional theory (DFT) calculations. The Visualizer module of Material Studio software used to construct single-layer nanotube. Then, we use the CASTEP code for optimize and calculate the band structure, density of states and optical properties of carboxyl group substitution on Single-Walled Carbon Nanotube (SWCNT/Carboxyl). The 𝐸𝑒𝑥𝑡 effects lead to modulate the band gap and change the total density of states (TDOS), partial density of states (PDOS), absorption coefficient, dielectric function, optical conductivity, refractive index and loss function. The application of an 𝐸𝑒𝑥𝑡 effect on SWCNT/Carboxyl structure, lead to close its band gap. The peaks of TDOS around the fermi level are very weak. The absorption coefficient increases in visible range and decreases in ultraviolet (UV) domain, by reason of increased an 𝐸𝑒𝑥𝑡 effects. It is found that electronic structures and optical properties of SWCNT/Carboxyl, could be affected by the 𝐸𝑒𝑥𝑡 effects. All these results provide the important information for understanding and controlling the electronic and optical properties of 1D-crystals by an 𝐸𝑒𝑥𝑡 effects. This study can provide certain theoretical basis for our future experimental work of optoelectronic properties of SWCNT/Carboxyl material.

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