scholarly journals Effect of different carbon allotropes on optical properties of CoCuMnOx solar selective coating

2021 ◽  
pp. 101086
Author(s):  
Fatma Taha ◽  
Nahed El Mahallawy ◽  
Madiha Shoeib
Keyword(s):  
Optical Properties ◽  
Selective Coating ◽  
Carbon Allotropes

scholarly journals On the structural stability and optical properties of germanium-based schwarzites: a density functional theory investigation

2020 ◽  
Vol 22 (28) ◽  
pp. 16286-16293
Author(s):  
Raphael M. Tromer ◽  
Levi C. Felix ◽  
Cristiano F. Woellner ◽  
Douglas S. Galvao
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Structural Stability ◽  
Density Functional ◽  
Functional Theory ◽  
3D Structures ◽  
Carbon Allotropes ◽  
2D And 3D

Since graphene was synthesized the interest in building new 2D and 3D structures based on carbon allotropes has been growing every day.

Optical properties and thermal stability of Ag/TiAlONM/TiAlOND/AlON spectral selective coating

Vacuum ◽  
2020 ◽  
Vol 175 ◽  
pp. 109244 ◽  
Author(s):  
Miao Du ◽  
Ke Xu ◽  
Lei Hao ◽  
Jing Mi ◽  
Qinghe Yu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Optical Properties ◽  
Selective Coating ◽  
Thermal Stability Of

scholarly journals Optical Properties of Carbon Doped by Nano Particle Titanium Dioxide to Enhance Solar Energy Absorption

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Rasheed NA
Keyword(s):  
Optical Properties ◽  
Solar Energy ◽  
Near Infrared ◽  
Energy Gap ◽  
Spray Pyrolysis Method ◽  
Indirect Transition ◽  
Selective Coating ◽  
Carbon Doped ◽  
Indirect Band Gap ◽  
Flat Plate Collector

The optical properties of carbon doped titanium oxide TiO2 were studied. The specimen prepared by utilizing spray pyrolysis method. The absorption coefficient, extinction coefficient, direct, indirect band gap, Urbach’s energy and high-frequency dielectric consistent with real and imaginary were investigated in the optical absorption spectral range of 200-1000 nm. The results showed the carbon is influenced TiO2 and has a semiconductor behavior; the energy gap was 3.15 eV of indirect transition and 3.2 eV for direct transition. The examination for the influence of TiO2 was an extension on the microstructure of carbon and it has an electrical behavior of the composite was distinguished. The modification of the substance structure of carbon by TiO2 doping permits photocatalytic movement of carbon towards the visible light and near infrared (NIR); this doped was gotten in a dry place at ambient temperature and its effect was expected from the physical properties of the energy gap, the advantages exhibited high absorption for spectral selective coating surfaces for operation by utilizing this coating on flat plate collector to give a high absorptivity from the solar energy respect to the incidence solar radiation.

scholarly journals Electronic and optical properties of novel carbon allotropes

Carbon ◽  
2016 ◽  
Vol 101 ◽  
pp. 77-85 ◽  
Author(s):  
Zhanyu Wang ◽  
F. Dong ◽  
B. Shen ◽  
R.J. Zhang ◽  
Y.X. Zheng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic And Optical Properties ◽  
Carbon Allotropes

Optical properties and thermal stability evaluation of solar absorbers enhanced by nanostructured selective coating films

2021 ◽  
Vol 377 ◽  
pp. 939-957 ◽  
Author(s):  
Bo Liu ◽  
Chunyu Wang ◽  
Shahab Bazri ◽  
Irfan Anjum Badruddin ◽  
Yasin Orooji ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Optical Properties ◽  
Stability Evaluation ◽  
Coating Films ◽  
Selective Coating ◽  
Solar Absorbers

scholarly journals Electronic and optical properties of novel carbon allotropes

2015 ◽  
Author(s):  
Zhanyu Wang ◽  
S.Y. Wang ◽  
R. J. Zhang ◽  
Y. X. Zheng ◽  
L.Y. Chen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic And Optical Properties ◽  
Carbon Allotropes

Design of objective lens for 200-kV high-resolution electron microscopes

1983 ◽  
Vol 41 ◽  
pp. 314-315
Author(s):  
K. Tsuno ◽  
T. Honda ◽  
Y. Harada ◽  
M. Naruse
Keyword(s):  
Optical Properties ◽  
Computer Technology ◽  
Axial Magnetic Field ◽  
Chromatic Aberration ◽  
Objective Lens ◽  
Resolution Electron ◽  
Correction Of Astigmatism ◽  
Three Stages ◽  
Electron Microscopes ◽  
Stage 1

Developement of computer technology provides much improvements on electron microscopy, such as simulation of images, reconstruction of images and automatic controll of microscopes (auto-focussing and auto-correction of astigmatism) and design of electron microscope lenses by using a finite element method (FEM). In this investigation, procedures for simulating the optical properties of objective lenses of HREM and the characteristics of the new lens for HREM at 200 kV are described.The process for designing the objective lens is divided into three stages. Stage 1 is the process for estimating the optical properties of the lens. Firstly, calculation by FEM is made for simulating the axial magnetic field distributions Bzc of the lens. Secondly, electron ray trajectory is numerically calculated by using Bzc. And lastly, using Bzc and ray trajectory, spherical and chromatic aberration coefficients Cs and Cc are numerically calculated. Above calculations are repeated by changing the shape of lens until! to find an optimum aberration coefficients.

Optical Properties of HVEM Accelerators

1975 ◽  
Vol 33 ◽  
pp. 180-181
Author(s):  
A. Strojnik ◽  
J.W. Scholl ◽  
V. Bevc
Keyword(s):  
Optical Properties ◽  
Electron Accelerator ◽  
Systematic Investigation ◽  
Electron Source ◽  
High Brightness ◽  
The Past ◽  
Wide Range ◽  
Optical Behavior

The electron accelerator, as inserted between the electron source (injector) and the imaging column of the HVEM, is usually a strong lens and should be optimized in order to ensure high brightness over a wide range of accelerating voltages and illuminating conditions. This is especially true in the case of the STEM where the brightness directly determines the highest resolution attainable. In the past, the optical behavior of accelerators was usually determined for a particular configuration. During the development of the accelerator for the Arizona 1 MEV STEM, systematic investigation was made of the major optical properties for a variety of electrode configurations, number of stages N, accelerating voltages, 1 and 10 MEV, and a range of injection voltages ϕ0 = 1, 3, 10, 30, 100, 300 kV).

Sign in / Sign up

Export Citation Format

Share Document