scholarly journals New approach between the Optical Basicity and the Dielectric Constant through the Molar Polarizability for Some Binary Glasses

2011 ◽  
Vol 2 (1) ◽  
pp. 1-7
Author(s):  
Parveen
Keyword(s):  
Dielectric Constant ◽  
Optical Basicity ◽  
New Approach ◽  
Molar Polarizability

Dielectric Constant and Molar Polarizability of Compressed Gaseous and Liquid Fluorine

1972 ◽  
Vol 57 (6) ◽  
pp. 2255-2259 ◽  
Author(s):  
G. C. Straty ◽  
B. A. Younglove
Keyword(s):  
Dielectric Constant ◽  
Molar Polarizability

Optical constant, dielectric constant and molar polarizability spectra of liquid hexane between 4000 and 400 cm−1 at 25 °C

2005 ◽  
Vol 121 (2-3) ◽  
pp. 121-126 ◽  
Author(s):  
C. Dale Keefe ◽  
Jennifer Lynn MacDonald
Keyword(s):  
Dielectric Constant ◽  
Optical Constant ◽  
Molar Polarizability

New Approach for Determining the Complex Dielectric Constant of Vegetation Leaves

1992 ◽  
Author(s):  
S. Trabelsi ◽  
M. Ghomi ◽  
J.C Peuch ◽  
H. Baudrand
Keyword(s):  
Dielectric Constant ◽  
Complex Dielectric Constant ◽  
New Approach

Sulfidization in Alcoholic Solutions: A New Surface Passivation Method for GaAs

1995 ◽  
Vol 378 ◽  
Author(s):  
Vasily N. Bessolov ◽  
Andrew F. Ivankov ◽  
Elena V. Konenkova ◽  
Mikhail V. Lebedev
Keyword(s):  
Dielectric Constant ◽  
Laser Irradiation ◽  
Surface Passivation ◽  
Surface Recombination ◽  
Low Dielectric Constant ◽  
New Approach ◽  
Low Dielectric ◽  
Acids And Bases ◽  
Sulfide Solution ◽  
Photoluminescence Efficiency

AbstractA new approach to GaAs surface passivation is suggested which consists in the treatment of GaAs in sulfide solutions in which different alcohols are used as solvents. It has been found that the photoluminescence efficiency of sulfide-treated GaAs associates with the dielectric constant of the solvent being used. With the decrease of dielectric constant value the PL intensity of sulfidized GaAs increases. Sulfidizing in isopropanol-, butanol- or t-butanol-based solutions leads to the formation of sulfide coat which PL properties remain constant even after strong laser irradiation. The effect of the solvent on the GaAs PL efficiensy is explained whithin the framework of hard and soft acids and bases. Thus the use of alcohol-based sulfide solution with low dielectric constant value greatly reduces surface recombination losses in sulfide-treated GaAs.

Modeling of Microwave Scattering From Cloud Ice Crystal Aggregates and Melting Aggregates: A New Approach

2010 ◽  
Vol 7 (3) ◽  
pp. 572-576 ◽  
Author(s):  
Giovanni Botta ◽  
Kültegin Aydin ◽  
Johannes Verlinde
Keyword(s):  
Dielectric Constant ◽  
Cross Sections ◽  
Melting Process ◽  
Effective Dielectric Constant ◽  
Ice Crystal ◽  
New Approach ◽  
Microwave Scattering ◽  
Spheroidal Shape ◽  
Cloud Ice ◽  
Scattering Cross Sections

Ice crystal aggregates and their melting process are modeled with a new approach for determining their microwave scattering characteristics and are compared with those obtained using effective dielectric constant representations. The aggregates are constructed from columnar crystals of random lengths (with the width being a function of the length), which are composed of a string of touching ice spheres with diameters equal to the column's width. The aggregates are melted using a model that incorporates the primary aspects of experimentally observed features of the melting process. The generalized multiparticle Mie method is used for computing the scattering cross sections of the dry and melting aggregates. The T-matrix method is used for computations involving a bulk representation of each aggregate with an effective dielectric constant model and an oblate spheroidal shape. The 3- and 35.6-GHz backscattering cross sections show significant differences between the two methods for both dry and melting aggregates. For sizes larger than 3 mm, these differences range from several decibels at 3 GHz to well over 7 dB at 35.6 GHz. Significant differences are also observed in the extinction cross sections during the melting process. It is concluded that the effective dielectric constant models of dry and melting ice crystal aggregates do not represent the interactions between the constituent crystals (and water droplets during melting) of the aggregates very well. Hence, bulk models must be used with caution particularly at millimeter wavelengths.

scholarly journals Electronic Polarizability and Optical Basicity of BaO-B2O3-TeO2 Glass System

2021 ◽  
Author(s):  
A. Amat ◽  
M. K. Halimah ◽  
M. Ishak ◽  
S. N. Nazrin ◽  
N. N. Syamimi ◽  
...  
Keyword(s):  
Urbach Energy ◽  
Glass Structure ◽  
Band Gap Energy ◽  
Optical Basicity ◽  
X Ray Diffraction ◽  
Lorenz Equation ◽  
Energy Value ◽  
Molar Polarizability ◽  
Quenching Method ◽  
Oxide Ion

Abstract [(TeO2)0.7(B2O3)0.3]1-x (BaO)x, x = 0.00, 0.05, 0.10, 0.20, 0.25, 0.30 and 0.35 mol fraction glass series were successfully synthesized by conventional melt quenching method. Amorphous phase of all samples was confirmed through X-ray diffraction while optical properties were determined using UV-VIS spectrophotometer. Fourier Transform Infrared (FTIR) analysis showed that the glass structure consisted of TeO3, TeO4, TeO6, BO3 and BO4 structural units. The optical band gap energy, Eopt which was calculated from Tauc’ plots decreased as the amount of BaO increases, whereas, the Urbach energy value increased. The increase in Urbach energy value was attributed to the increase of defects in glass structure. The refractive indices of glass were found to increase along with the increased amount of BaO, due to the high polarization and high density of host material and glass modifier. The molar polarizability, αm, oxide ion polarizability, αo2- and optical basicity, Λ of the glasses are calculated by Lorentz-Lorenz equation. The glasses were found to possess αm values between 8.106 – 8.489 Å3, and αo2- values between 3.303 to 4.772. Meanwhile, optical basicity increases from 0.115 to 0.893.

A new approach to estimate refractive index, electronic polarizability, and optical basicity of binary oxide glasses

2008 ◽  
Vol 403 (13-16) ◽  
pp. 2450-2460 ◽  
Author(s):  
Xinyu Zhao ◽  
Xiaoli Wang ◽  
Hai Lin ◽  
Zhiqiang Wang
Keyword(s):  
Refractive Index ◽  
Binary Oxide ◽  
Optical Basicity ◽  
Oxide Glasses ◽  
Electronic Polarizability ◽  
New Approach
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