Optical properties of coatings of oxidized graphite and its intercalated compound with ammonium dodecahydro-closo-dodecaborate

2010 ◽  
Vol 84 (8) ◽  
pp. 1395-1400 ◽  
Author(s):  
V. I. Saldin ◽  
A. A. Karpenko ◽  
A. K. Tsvetnikov
Keyword(s):  
Optical Properties ◽  
Properties Of Coatings ◽  
Oxidized Graphite

Optical Properties of Films of Graphite Oxide, Reduced Graphite Oxide and its Intercalated Compounds with Ammonium Dodecahydro-closo-Dodecaborate

2013 ◽  
Vol 302 ◽  
pp. 170-175 ◽  
Author(s):  
Alexander A. Karpenko ◽  
Vitaly I. Saldin
Keyword(s):  
Optical Properties ◽  
Optical Density ◽  
Graphite Oxide ◽  
Light Radiation ◽  
Intercalated Compounds ◽  
Reduced Graphite Oxide ◽  
Before And After ◽  
Carbon Release ◽  
Oxidized Graphite ◽  
Transmission And Absorption

The influence of light radiation with different wavelengths (546, 380, 365 nm) on the coatings of oxidized graphite and its intercalated compound with ammonium dodecahydrododecaborate (NH4)2B12H12 was studied. The transmission and absorption spectra of the coatings were measured before and after irradiation. It was shown that the optical density of the coatings increased because of carbon release (blackening), which was especially strong during UV irradiation. Under the same conditions (wavelength, power, time), the change in the optical density was much larger for the intercalated compound than for oxidized graphite. This can be explained by the presence of the anion B12H12 2- in the former. It is not appropriate to refer to graphite oxide or reduced graphite oxide simply as graphene since their properties are substantially different.

Optical Properties of Coatings. Effect of Pigment Concentration

AIAA Journal ◽  
1971 ◽  
Vol 9 (10) ◽  
pp. 1895-1898 ◽  
Author(s):  
H. C. HOTTEL ◽  
A. F. SAROFIM ◽  
W. H. DALZELL ◽  
I. A. VASALOS
Keyword(s):  
Optical Properties ◽  
Pigment Concentration ◽  
Properties Of Coatings

Adjustable optical properties of coatings based on cermet thin films near the percolation threshold

1989 ◽  
Vol 157 (1) ◽  
pp. 555-560 ◽  
Author(s):  
C. Sella ◽  
A. Bichri ◽  
J.C. Martin ◽  
J. Lafait ◽  
K. Driss-Khodja ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Percolation Threshold ◽  
Properties Of Coatings

Optical properties of coatings effect of pigment concentration

1970 ◽  
Author(s):  
W. DALZELL ◽  
H. HOTTEL ◽  
A. SAROFIM ◽  
I. VASALOS
Keyword(s):  
Optical Properties ◽  
Pigment Concentration ◽  
Properties Of Coatings

Optical Properties of Coatings with Cu and Copper Oxide Colloidal Particles in a SiO2 Matrix

1998 ◽  
Vol 287-288 ◽  
pp. 489-492 ◽  
Author(s):  
F.J. Espinoza-Beltrán ◽  
R. Bernal ◽  
J. Manzanares-Martínez ◽  
F.J. García-Rodrígez ◽  
J.F. Pérez-Robles ◽  
...  
Keyword(s):  
Optical Properties ◽  
Copper Oxide ◽  
Colloidal Particles ◽  
Properties Of Coatings

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).

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