A pulse radiolysis study of H atom reactions with aliphatic alcohols: evaluation of kinetics by direct optical absorption measurement

2001 ◽  
Vol 3 (13) ◽  
pp. 2622-2624 ◽  
Author(s):  
M. S. Alam ◽  
B. S. M. Rao ◽  
E. Janata
Keyword(s):  
Optical Absorption ◽  
Pulse Radiolysis ◽  
Absorption Measurement ◽  
Aliphatic Alcohols ◽  
Optical Absorption Measurement

Gap states density in a-Si:H deduced from subgap optical absorption measurement on Schottky solar cells

1984 ◽  
Vol 83 (2) ◽  
pp. 617-623 ◽  
Author(s):  
M. Vaněček ◽  
A. Abrahám ◽  
O. Štika ◽  
J. Stuchlík ◽  
J. Kočka
Keyword(s):  
Solar Cells ◽  
Optical Absorption ◽  
Absorption Measurement ◽  
Optical Absorption Measurement ◽  
Gap States

Irradiation Effect of Gamma Ray on Electrical Characteristics of Perfluorosulfonic Acid Polymer Membrane

2012 ◽  
Vol 9 (3) ◽  
Author(s):  
Ghasem Forozani ◽  
Pezhman Shamshiri ◽  
Nasrin Sheikh
Keyword(s):  
Electrical Conductivity ◽  
Optical Absorption ◽  
Gamma Ray ◽  
Absorption Measurement ◽  
Irradiation Effect ◽  
Peroxy Radicals ◽  
Perfluorosulfonic Acid ◽  
Absorption Bands ◽  
Optical Absorption Measurement ◽  
Order Of Magnitude

Perfluorosulfonic acid polymer membranes, such as Nafion®, Aciplex®, and Flemion®, are attracting great attention as electrolyte membranes for fuel cells because they have high proton conductivity. In this paper, the effect of γ rays on the electrical properties of perfluorosulfonic acid membranes by applying a variable voltage and measuring the current and dimension of the sample have been investigated. In order to understand the irradiation effects on conductivity changes, we have used optical absorption measurement in the wavelength of 190 ∼ 500 nm. The results show that the electrical conductivity has been increased by increasing the absorption dose, and intensity of the absorption bands have increased by increasing the absorption dose. The electrical conductivities of the irradiated membranes at room temperature are enhanced about one order of magnitude higher than the conductivities of an unirradiated membrane. Moreover, an optical absorption measurement shows that the structures of the membranes are modified by γ radiation. Intensity absorption bands associated to fluorocarbon and peroxy radicals and C=O groups increased with increasing the dose. The change in electrical conductivity seems to be related to the high production of peroxy radicals in the irradiated membrane.

Near-Infrared Photodetection with Molecular Beam Epitaxy Grown Extended InGaAs

2005 ◽  
Vol 883 ◽  
Author(s):  
Jun-Xian Fu ◽  
Xiaojun Yu ◽  
Yu-Hsuan Kuo ◽  
James S Harris
Keyword(s):  
Electron Microscope ◽  
Molecular Beam Epitaxy ◽  
Optical Absorption ◽  
Molecular Beam ◽  
Near Infrared ◽  
Absorption Measurement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Optical Absorption Measurement ◽  
Infrared Photodetection

AbstractStrain-balanced InxGa1-xAs/InyGa1-yAs superlattices and fractional monolayer In0.532Ga0.468As/InAs superlattices were grown by solid-source molecular beam epitaxy (SSMBE) in order to extend the photodetection wavelength range beyond 1.7μm. Material qualities were characterized by transmitted electron microscope (TEM), X-ray diffraction (XRD), roomtemperature photoluminesecence (RTPL) and optical absorption measurement.

Solid state properties of hydroxyurea: Optical absorption measurement and DFT calculations

2019 ◽  
Vol 125 (13) ◽  
pp. 134901
Author(s):  
Bruno P. Silva ◽  
Romelia P. G. Lemes ◽  
Geancarlo Zanatta ◽  
Regina Claudia Rodrigues dos Santos ◽  
Pedro de Lima-Neto ◽  
...  
Keyword(s):  
Solid State ◽  
Optical Absorption ◽  
Dft Calculations ◽  
Absorption Measurement ◽  
Optical Absorption Measurement
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